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@@ -1,375 +1,414 b'' | |||||
1 | """Analysis of text input into executable blocks. |
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1 | """Analysis of text input into executable blocks. | |
2 |
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2 | |||
3 | This is a simple example of how an interactive terminal-based client can use |
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3 | The main class in this module, :class:`InputSplitter`, is designed to break | |
4 | this tool:: |
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4 | input from either interactive, line-by-line environments or block-based ones, | |
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5 | into standalone blocks that can be executed by Python as 'single' statements | |||
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6 | (thus triggering sys.displayhook). | |||
5 |
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7 | |||
6 | bb = BlockBreaker() |
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8 | For more details, see the class docstring below. | |
7 | while not bb.interactive_block_ready(): |
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8 | bb.push(raw_input('>>> ')) |
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9 | print 'Input source was:\n', bb.source, |
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10 | """ |
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9 | """ | |
11 | #----------------------------------------------------------------------------- |
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10 | #----------------------------------------------------------------------------- | |
12 | # Copyright (C) 2010 The IPython Development Team |
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11 | # Copyright (C) 2010 The IPython Development Team | |
13 | # |
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12 | # | |
14 | # Distributed under the terms of the BSD License. The full license is in |
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13 | # Distributed under the terms of the BSD License. The full license is in | |
15 | # the file COPYING, distributed as part of this software. |
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14 | # the file COPYING, distributed as part of this software. | |
16 | #----------------------------------------------------------------------------- |
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15 | #----------------------------------------------------------------------------- | |
17 |
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16 | |||
18 | #----------------------------------------------------------------------------- |
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17 | #----------------------------------------------------------------------------- | |
19 | # Imports |
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18 | # Imports | |
20 | #----------------------------------------------------------------------------- |
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19 | #----------------------------------------------------------------------------- | |
21 | # stdlib |
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20 | # stdlib | |
22 | import codeop |
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21 | import codeop | |
23 | import re |
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22 | import re | |
24 | import sys |
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23 | import sys | |
25 |
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24 | |||
26 | #----------------------------------------------------------------------------- |
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25 | #----------------------------------------------------------------------------- | |
27 | # Utilities |
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26 | # Utilities | |
28 | #----------------------------------------------------------------------------- |
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27 | #----------------------------------------------------------------------------- | |
29 |
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28 | |||
30 | # FIXME: move these utilities to the general ward... |
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29 | # FIXME: move these utilities to the general ward... | |
31 |
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30 | |||
32 | # compiled regexps for autoindent management |
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31 | # compiled regexps for autoindent management | |
33 | dedent_re = re.compile(r'^\s+raise|^\s+return|^\s+pass') |
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32 | dedent_re = re.compile(r'^\s+raise|^\s+return|^\s+pass') | |
34 | ini_spaces_re = re.compile(r'^([ \t\r\f\v]+)') |
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33 | ini_spaces_re = re.compile(r'^([ \t\r\f\v]+)') | |
35 |
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34 | |||
36 |
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35 | |||
37 | def num_ini_spaces(s): |
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36 | def num_ini_spaces(s): | |
38 | """Return the number of initial spaces in a string. |
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37 | """Return the number of initial spaces in a string. | |
39 |
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38 | |||
40 | Note that tabs are counted as a single space. For now, we do *not* support |
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39 | Note that tabs are counted as a single space. For now, we do *not* support | |
41 | mixing of tabs and spaces in the user's input. |
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40 | mixing of tabs and spaces in the user's input. | |
42 |
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41 | |||
43 | Parameters |
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42 | Parameters | |
44 | ---------- |
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43 | ---------- | |
45 | s : string |
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44 | s : string | |
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45 | ||||
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46 | Returns | |||
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47 | ------- | |||
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48 | n : int | |||
46 | """ |
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49 | """ | |
47 |
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50 | |||
48 | ini_spaces = ini_spaces_re.match(s) |
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51 | ini_spaces = ini_spaces_re.match(s) | |
49 | if ini_spaces: |
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52 | if ini_spaces: | |
50 | return ini_spaces.end() |
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53 | return ini_spaces.end() | |
51 | else: |
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54 | else: | |
52 | return 0 |
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55 | return 0 | |
53 |
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56 | |||
54 |
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57 | |||
55 | def remove_comments(src): |
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58 | def remove_comments(src): | |
56 | """Remove all comments from input source. |
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59 | """Remove all comments from input source. | |
57 |
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60 | |||
58 | Note: comments are NOT recognized inside of strings! |
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61 | Note: comments are NOT recognized inside of strings! | |
59 |
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62 | |||
60 | Parameters |
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63 | Parameters | |
61 | ---------- |
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64 | ---------- | |
62 | src : string |
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65 | src : string | |
63 | A single or multiline input string. |
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66 | A single or multiline input string. | |
64 |
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67 | |||
65 | Returns |
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68 | Returns | |
66 | ------- |
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69 | ------- | |
67 | String with all Python comments removed. |
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70 | String with all Python comments removed. | |
68 | """ |
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71 | """ | |
69 |
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72 | |||
70 | return re.sub('#.*', '', src) |
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73 | return re.sub('#.*', '', src) | |
71 |
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74 | |||
72 |
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75 | |||
73 | def get_input_encoding(): |
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76 | def get_input_encoding(): | |
74 | """Return the default standard input encoding.""" |
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77 | """Return the default standard input encoding.""" | |
75 | return getattr(sys.stdin, 'encoding', 'ascii') |
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78 | return getattr(sys.stdin, 'encoding', 'ascii') | |
76 |
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79 | |||
77 | #----------------------------------------------------------------------------- |
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80 | #----------------------------------------------------------------------------- | |
78 | # Classes and functions |
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81 | # Classes and functions | |
79 | #----------------------------------------------------------------------------- |
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82 | #----------------------------------------------------------------------------- | |
80 |
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83 | |||
81 |
class |
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84 | class InputSplitter(object): | |
82 | # Command compiler |
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85 | """An object that can split Python source input in executable blocks. | |
83 | compile = None |
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86 | ||
84 | # Number of spaces of indentation |
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87 | This object is designed to be used in one of two basic modes: | |
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88 | ||||
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89 | 1. By feeding it python source line-by-line, using :meth:`push`. In this | |||
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90 | mode, it will return on each push whether the currently pushed code | |||
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91 | could be executed already. In addition, it provides a method called | |||
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92 | :meth:`push_accepts_more` that can be used to query whether more input | |||
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93 | can be pushed into a single interactive block. | |||
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94 | ||||
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95 | 2. By calling :meth:`split_blocks` with a single, multiline Python string, | |||
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96 | that is then split into blocks each of which can be executed | |||
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97 | interactively as a single statement. | |||
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98 | ||||
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99 | This is a simple example of how an interactive terminal-based client can use | |||
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100 | this tool:: | |||
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101 | ||||
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102 | isp = InputSplitter() | |||
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103 | while isp.push_accepts_more(): | |||
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104 | indent = ' '*isp.indent_spaces | |||
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105 | prompt = '>>> ' + indent | |||
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106 | line = indent + raw_input(prompt) | |||
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107 | isp.push(line) | |||
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108 | print 'Input source was:\n', isp.source_reset(), | |||
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109 | """ | |||
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110 | # Number of spaces of indentation computed from input that has been pushed | |||
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111 | # so far. This is the attributes callers should query to get the current | |||
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112 | # indentation level, in order to provide auto-indent facilities. | |||
85 | indent_spaces = 0 |
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113 | indent_spaces = 0 | |
86 | # Mark when input has changed indentation all the way back to flush-left |
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114 | # String, indicating the default input encoding. It is computed by default | |
87 | full_dedent = False |
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115 | # at initialization time via get_input_encoding(), but it can be reset by a | |
88 | # String, indicating the default input encoding |
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116 | # client with specific knowledge of the encoding. | |
89 | encoding = '' |
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117 | encoding = '' | |
90 | # String where the current full source input is stored, properly encoded |
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118 | # String where the current full source input is stored, properly encoded. | |
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119 | # Reading this attribute is the normal way of querying the currently pushed | |||
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120 | # source code, that has been properly encoded. | |||
91 | source = '' |
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121 | source = '' | |
92 | # Code object corresponding to the current source |
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122 | # Code object corresponding to the current source. It is automatically | |
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123 | # synced to the source, so it can be queried at any time to obtain the code | |||
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124 | # object; it will be None if the source doesn't compile to valid Python. | |||
93 | code = None |
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125 | code = None | |
94 | # Boolean indicating whether the current block is complete |
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95 | is_complete = None |
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96 | # Input mode |
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126 | # Input mode | |
97 | input_mode = 'append' |
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127 | input_mode = 'append' | |
98 |
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128 | |||
99 | # Private attributes |
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129 | # Private attributes | |
100 |
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130 | |||
101 | # List |
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131 | # List with lines of input accumulated so far | |
102 | _buffer = None |
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132 | _buffer = None | |
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133 | # Command compiler | |||
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134 | _compile = None | |||
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135 | # Mark when input has changed indentation all the way back to flush-left | |||
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136 | _full_dedent = False | |||
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137 | # Boolean indicating whether the current block is complete | |||
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138 | _is_complete = None | |||
103 |
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139 | |||
104 | def __init__(self, input_mode=None): |
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140 | def __init__(self, input_mode=None): | |
105 |
"""Create a new |
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141 | """Create a new InputSplitter instance. | |
106 |
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142 | |||
107 | Parameters |
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143 | Parameters | |
108 | ---------- |
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144 | ---------- | |
109 | input_mode : str |
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145 | input_mode : str | |
110 |
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146 | |||
111 | One of 'append', 'replace', default is 'append'. This controls how |
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147 | One of 'append', 'replace', default is 'append'. This controls how | |
112 | new inputs are used: in 'append' mode, they are appended to the |
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148 | new inputs are used: in 'append' mode, they are appended to the | |
113 | existing buffer and the whole buffer is compiled; in 'replace' mode, |
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149 | existing buffer and the whole buffer is compiled; in 'replace' mode, | |
114 | each new input completely replaces all prior inputs. Replace mode is |
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150 | each new input completely replaces all prior inputs. Replace mode is | |
115 | thus equivalent to prepending a full reset() to every push() call. |
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151 | thus equivalent to prepending a full reset() to every push() call. | |
116 |
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152 | |||
117 | In practice, line-oriented clients likely want to use 'append' mode |
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153 | In practice, line-oriented clients likely want to use 'append' mode | |
118 | while block-oriented ones will want to use 'replace'. |
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154 | while block-oriented ones will want to use 'replace'. | |
119 | """ |
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155 | """ | |
120 | self._buffer = [] |
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156 | self._buffer = [] | |
121 | self.compile = codeop.CommandCompiler() |
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157 | self._compile = codeop.CommandCompiler() | |
122 | self.encoding = get_input_encoding() |
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158 | self.encoding = get_input_encoding() | |
123 |
self.input_mode = |
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159 | self.input_mode = InputSplitter.input_mode if input_mode is None \ | |
124 | else input_mode |
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160 | else input_mode | |
125 |
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161 | |||
126 | def reset(self): |
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162 | def reset(self): | |
127 | """Reset the input buffer and associated state.""" |
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163 | """Reset the input buffer and associated state.""" | |
128 | self.indent_spaces = 0 |
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164 | self.indent_spaces = 0 | |
129 | self._buffer[:] = [] |
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165 | self._buffer[:] = [] | |
130 | self.source = '' |
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166 | self.source = '' | |
131 | self.code = None |
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167 | self.code = None | |
132 | self.is_complete = False |
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168 | self._is_complete = False | |
133 | self.full_dedent = False |
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169 | self._full_dedent = False | |
134 |
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170 | |||
135 | def source_reset(self): |
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171 | def source_reset(self): | |
136 | """Return the input source and perform a full reset. |
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172 | """Return the input source and perform a full reset. | |
137 | """ |
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173 | """ | |
138 | out = self.source |
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174 | out = self.source | |
139 | self.reset() |
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175 | self.reset() | |
140 | return out |
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176 | return out | |
141 |
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177 | |||
142 | def push(self, lines): |
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178 | def push(self, lines): | |
143 | """Push one ore more lines of input. |
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179 | """Push one ore more lines of input. | |
144 |
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180 | |||
145 | This stores the given lines and returns a status code indicating |
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181 | This stores the given lines and returns a status code indicating | |
146 | whether the code forms a complete Python block or not. |
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182 | whether the code forms a complete Python block or not. | |
147 |
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183 | |||
148 |
Any exceptions generated in compilation are allowed |
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184 | Any exceptions generated in compilation are swallowed, but if an | |
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185 | exception was produced, the method returns True. | |||
149 |
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186 | |||
150 | Parameters |
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187 | Parameters | |
151 | ---------- |
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188 | ---------- | |
152 | lines : string |
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189 | lines : string | |
153 | One or more lines of Python input. |
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190 | One or more lines of Python input. | |
154 |
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191 | |||
155 | Returns |
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192 | Returns | |
156 | ------- |
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193 | ------- | |
157 | is_complete : boolean |
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194 | is_complete : boolean | |
158 | True if the current input source (the result of the current input |
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195 | True if the current input source (the result of the current input | |
159 | plus prior inputs) forms a complete Python execution block. Note that |
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196 | plus prior inputs) forms a complete Python execution block. Note that | |
160 |
this value is also stored as a |
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197 | this value is also stored as a private attribute (_is_complete), so it | |
161 | time. |
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198 | can be queried at any time. | |
162 | """ |
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199 | """ | |
163 | if self.input_mode == 'replace': |
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200 | if self.input_mode == 'replace': | |
164 | self.reset() |
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201 | self.reset() | |
165 |
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202 | |||
166 | # If the source code has leading blanks, add 'if 1:\n' to it |
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203 | # If the source code has leading blanks, add 'if 1:\n' to it | |
167 | # this allows execution of indented pasted code. It is tempting |
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204 | # this allows execution of indented pasted code. It is tempting | |
168 | # to add '\n' at the end of source to run commands like ' a=1' |
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205 | # to add '\n' at the end of source to run commands like ' a=1' | |
169 | # directly, but this fails for more complicated scenarios |
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206 | # directly, but this fails for more complicated scenarios | |
170 | if not self._buffer and lines[:1] in [' ', '\t']: |
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207 | if not self._buffer and lines[:1] in [' ', '\t']: | |
171 | lines = 'if 1:\n%s' % lines |
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208 | lines = 'if 1:\n%s' % lines | |
172 |
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209 | |||
173 | self._store(lines) |
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210 | self._store(lines) | |
174 | source = self.source |
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211 | source = self.source | |
175 |
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212 | |||
176 | # Before calling compile(), reset the code object to None so that if an |
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213 | # Before calling _compile(), reset the code object to None so that if an | |
177 | # exception is raised in compilation, we don't mislead by having |
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214 | # exception is raised in compilation, we don't mislead by having | |
178 | # inconsistent code/source attributes. |
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215 | # inconsistent code/source attributes. | |
179 | self.code, self.is_complete = None, None |
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216 | self.code, self._is_complete = None, None | |
180 |
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217 | |||
181 | self._update_indent(lines) |
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218 | self._update_indent(lines) | |
182 | try: |
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219 | try: | |
183 | self.code = self.compile(source) |
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220 | self.code = self._compile(source) | |
184 | # Invalid syntax can produce any of a number of different errors from |
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221 | # Invalid syntax can produce any of a number of different errors from | |
185 | # inside the compiler, so we have to catch them all. Syntax errors |
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222 | # inside the compiler, so we have to catch them all. Syntax errors | |
186 | # immediately produce a 'ready' block, so the invalid Python can be |
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223 | # immediately produce a 'ready' block, so the invalid Python can be | |
187 | # sent to the kernel for evaluation with possible ipython |
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224 | # sent to the kernel for evaluation with possible ipython | |
188 | # special-syntax conversion. |
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225 | # special-syntax conversion. | |
189 | except (SyntaxError, OverflowError, ValueError, TypeError, |
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226 | except (SyntaxError, OverflowError, ValueError, TypeError, | |
190 | MemoryError): |
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227 | MemoryError): | |
191 | self.is_complete = True |
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228 | self._is_complete = True | |
192 | else: |
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229 | else: | |
193 | # Compilation didn't produce any exceptions (though it may not have |
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230 | # Compilation didn't produce any exceptions (though it may not have | |
194 | # given a complete code object) |
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231 | # given a complete code object) | |
195 | self.is_complete = self.code is not None |
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232 | self._is_complete = self.code is not None | |
196 |
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233 | |||
197 | return self.is_complete |
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234 | return self._is_complete | |
198 |
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235 | |||
199 |
def |
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236 | def push_accepts_more(self): | |
200 |
"""Return whether a block of interactive input |
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237 | """Return whether a block of interactive input can accept more input. | |
201 |
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238 | |||
202 | This method is meant to be used by line-oriented frontends, who need to |
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239 | This method is meant to be used by line-oriented frontends, who need to | |
203 | guess whether a block is complete or not based solely on prior and |
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240 | guess whether a block is complete or not based solely on prior and | |
204 |
current input lines. The |
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241 | current input lines. The InputSplitter considers it has a complete | |
205 | interactive block when *all* of the following are true: |
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242 | interactive block and will not accept more input only when either a | |
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243 | SyntaxError is raised, or *all* of the following are true: | |||
206 |
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244 | |||
207 | 1. The input compiles to a complete statement. |
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245 | 1. The input compiles to a complete statement. | |
208 |
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246 | |||
209 | 2. The indentation level is flush-left (because if we are indented, |
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247 | 2. The indentation level is flush-left (because if we are indented, | |
210 | like inside a function definition or for loop, we need to keep |
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248 | like inside a function definition or for loop, we need to keep | |
211 | reading new input). |
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249 | reading new input). | |
212 |
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250 | |||
213 | 3. There is one extra line consisting only of whitespace. |
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251 | 3. There is one extra line consisting only of whitespace. | |
214 |
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252 | |||
215 | Because of condition #3, this method should be used only by |
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253 | Because of condition #3, this method should be used only by | |
216 | *line-oriented* frontends, since it means that intermediate blank lines |
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254 | *line-oriented* frontends, since it means that intermediate blank lines | |
217 | are not allowed in function definitions (or any other indented block). |
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255 | are not allowed in function definitions (or any other indented block). | |
218 |
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256 | |||
219 | Block-oriented frontends that have a separate keyboard event to |
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257 | Block-oriented frontends that have a separate keyboard event to | |
220 | indicate execution should use the :meth:`split_blocks` method instead. |
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258 | indicate execution should use the :meth:`split_blocks` method instead. | |
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259 | ||||
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260 | If the current input produces a syntax error, this method immediately | |||
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261 | returns False but does *not* raise the syntax error exception, as | |||
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262 | typically clients will want to send invalid syntax to an execution | |||
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263 | backend which might convert the invalid syntax into valid Python via | |||
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264 | one of the dynamic IPython mechanisms. | |||
221 | """ |
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265 | """ | |
222 | #print 'complete?', self.source # dbg |
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223 | #if self.full_dedent: |
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224 | # True |
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225 |
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266 | |||
226 | if not self.is_complete: |
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267 | if not self._is_complete: | |
227 | return False |
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|||
228 | if self.indent_spaces==0: |
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229 | return True |
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268 | return True | |
230 | last_line = self.source.splitlines()[-1] |
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269 | ||
231 | if not last_line or last_line.isspace(): |
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270 | if self.indent_spaces==0: | |
232 | return True |
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|||
233 | else: |
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234 | return False |
|
271 | return False | |
235 |
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272 | |||
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273 | last_line = self.source.splitlines()[-1] | |||
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274 | return bool(last_line and not last_line.isspace()) | |||
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275 | ||||
236 | def split_blocks(self, lines): |
|
276 | def split_blocks(self, lines): | |
237 | """Split a multiline string into multiple input blocks. |
|
277 | """Split a multiline string into multiple input blocks. | |
238 |
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278 | |||
239 | Note: this method starts by performing a full reset(). |
|
279 | Note: this method starts by performing a full reset(). | |
240 |
|
280 | |||
241 | Parameters |
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281 | Parameters | |
242 | ---------- |
|
282 | ---------- | |
243 | lines : str |
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283 | lines : str | |
244 | A possibly multiline string. |
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284 | A possibly multiline string. | |
245 |
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285 | |||
246 | Returns |
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286 | Returns | |
247 | ------- |
|
287 | ------- | |
248 | blocks : list |
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288 | blocks : list | |
249 | A list of strings, each possibly multiline. Each string corresponds |
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289 | A list of strings, each possibly multiline. Each string corresponds | |
250 | to a single block that can be compiled in 'single' mode (unless it |
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290 | to a single block that can be compiled in 'single' mode (unless it | |
251 | has a syntax error).""" |
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291 | has a syntax error).""" | |
252 |
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292 | |||
253 | # This code is fairly delicate. If you make any changes here, make |
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293 | # This code is fairly delicate. If you make any changes here, make | |
254 | # absolutely sure that you do run the full test suite and ALL tests |
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294 | # absolutely sure that you do run the full test suite and ALL tests | |
255 | # pass. |
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295 | # pass. | |
256 |
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296 | |||
257 | self.reset() |
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297 | self.reset() | |
258 | blocks = [] |
|
298 | blocks = [] | |
259 |
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299 | |||
260 | # Reversed copy so we can use pop() efficiently and consume the input |
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300 | # Reversed copy so we can use pop() efficiently and consume the input | |
261 | # as a stack |
|
301 | # as a stack | |
262 | lines = lines.splitlines()[::-1] |
|
302 | lines = lines.splitlines()[::-1] | |
263 | # Outer loop over all input |
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303 | # Outer loop over all input | |
264 | while lines: |
|
304 | while lines: | |
265 | # Inner loop to build each block |
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305 | # Inner loop to build each block | |
266 | while True: |
|
306 | while True: | |
267 | # Safety exit from inner loop |
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307 | # Safety exit from inner loop | |
268 | if not lines: |
|
308 | if not lines: | |
269 | break |
|
309 | break | |
270 | # Grab next line but don't push it yet |
|
310 | # Grab next line but don't push it yet | |
271 | next_line = lines.pop() |
|
311 | next_line = lines.pop() | |
272 | # Blank/empty lines are pushed as-is |
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312 | # Blank/empty lines are pushed as-is | |
273 | if not next_line or next_line.isspace(): |
|
313 | if not next_line or next_line.isspace(): | |
274 | self.push(next_line) |
|
314 | self.push(next_line) | |
275 | continue |
|
315 | continue | |
276 |
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316 | |||
277 | # Check indentation changes caused by the *next* line |
|
317 | # Check indentation changes caused by the *next* line | |
278 | indent_spaces, full_dedent = self._find_indent(next_line) |
|
318 | indent_spaces, _full_dedent = self._find_indent(next_line) | |
279 |
|
319 | |||
280 | # If the next line causes a dedent, it can be for two differnt |
|
320 | # If the next line causes a dedent, it can be for two differnt | |
281 | # reasons: either an explicit de-dent by the user or a |
|
321 | # reasons: either an explicit de-dent by the user or a | |
282 | # return/raise/pass statement. These MUST be handled |
|
322 | # return/raise/pass statement. These MUST be handled | |
283 | # separately: |
|
323 | # separately: | |
284 | # |
|
324 | # | |
285 | # 1. the first case is only detected when the actual explicit |
|
325 | # 1. the first case is only detected when the actual explicit | |
286 | # dedent happens, and that would be the *first* line of a *new* |
|
326 | # dedent happens, and that would be the *first* line of a *new* | |
287 | # block. Thus, we must put the line back into the input buffer |
|
327 | # block. Thus, we must put the line back into the input buffer | |
288 | # so that it starts a new block on the next pass. |
|
328 | # so that it starts a new block on the next pass. | |
289 | # |
|
329 | # | |
290 | # 2. the second case is detected in the line before the actual |
|
330 | # 2. the second case is detected in the line before the actual | |
291 | # dedent happens, so , we consume the line and we can break out |
|
331 | # dedent happens, so , we consume the line and we can break out | |
292 | # to start a new block. |
|
332 | # to start a new block. | |
293 |
|
333 | |||
294 | # Case 1, explicit dedent causes a break |
|
334 | # Case 1, explicit dedent causes a break | |
295 | if full_dedent and not next_line.startswith(' '): |
|
335 | if _full_dedent and not next_line.startswith(' '): | |
296 | lines.append(next_line) |
|
336 | lines.append(next_line) | |
297 | break |
|
337 | break | |
298 |
|
338 | |||
299 | # Otherwise any line is pushed |
|
339 | # Otherwise any line is pushed | |
300 | self.push(next_line) |
|
340 | self.push(next_line) | |
301 |
|
341 | |||
302 | # Case 2, full dedent with full block ready: |
|
342 | # Case 2, full dedent with full block ready: | |
303 | if full_dedent or \ |
|
343 | if _full_dedent or \ | |
304 |
self.indent_spaces==0 and self. |
|
344 | self.indent_spaces==0 and not self.push_accepts_more(): | |
305 | break |
|
345 | break | |
306 | # Form the new block with the current source input |
|
346 | # Form the new block with the current source input | |
307 | blocks.append(self.source_reset()) |
|
347 | blocks.append(self.source_reset()) | |
308 |
|
348 | |||
309 | return blocks |
|
349 | return blocks | |
310 |
|
350 | |||
311 | #------------------------------------------------------------------------ |
|
351 | #------------------------------------------------------------------------ | |
312 | # Private interface |
|
352 | # Private interface | |
313 | #------------------------------------------------------------------------ |
|
353 | #------------------------------------------------------------------------ | |
314 |
|
354 | |||
315 | def _find_indent(self, line): |
|
355 | def _find_indent(self, line): | |
316 | """Compute the new indentation level for a single line. |
|
356 | """Compute the new indentation level for a single line. | |
317 |
|
357 | |||
318 | Parameters |
|
358 | Parameters | |
319 | ---------- |
|
359 | ---------- | |
320 | line : str |
|
360 | line : str | |
321 | A single new line of non-whitespace, non-comment Python input. |
|
361 | A single new line of non-whitespace, non-comment Python input. | |
322 |
|
362 | |||
323 | Returns |
|
363 | Returns | |
324 | ------- |
|
364 | ------- | |
325 | indent_spaces : int |
|
365 | indent_spaces : int | |
326 | New value for the indent level (it may be equal to self.indent_spaces |
|
366 | New value for the indent level (it may be equal to self.indent_spaces | |
327 | if indentation doesn't change. |
|
367 | if indentation doesn't change. | |
328 |
|
368 | |||
329 | full_dedent : boolean |
|
369 | full_dedent : boolean | |
330 | Whether the new line causes a full flush-left dedent. |
|
370 | Whether the new line causes a full flush-left dedent. | |
331 | """ |
|
371 | """ | |
332 | indent_spaces = self.indent_spaces |
|
372 | indent_spaces = self.indent_spaces | |
333 | full_dedent = self.full_dedent |
|
373 | full_dedent = self._full_dedent | |
334 |
|
374 | |||
335 | inisp = num_ini_spaces(line) |
|
375 | inisp = num_ini_spaces(line) | |
336 | if inisp < indent_spaces: |
|
376 | if inisp < indent_spaces: | |
337 | indent_spaces = inisp |
|
377 | indent_spaces = inisp | |
338 | if indent_spaces <= 0: |
|
378 | if indent_spaces <= 0: | |
339 | #print 'Full dedent in text',self.source # dbg |
|
379 | #print 'Full dedent in text',self.source # dbg | |
340 | full_dedent = True |
|
380 | full_dedent = True | |
341 |
|
381 | |||
342 | if line[-1] == ':': |
|
382 | if line[-1] == ':': | |
343 | indent_spaces += 4 |
|
383 | indent_spaces += 4 | |
344 | elif dedent_re.match(line): |
|
384 | elif dedent_re.match(line): | |
345 | indent_spaces -= 4 |
|
385 | indent_spaces -= 4 | |
346 | if indent_spaces <= 0: |
|
386 | if indent_spaces <= 0: | |
347 | full_dedent = True |
|
387 | full_dedent = True | |
348 |
|
388 | |||
349 | # Safety |
|
389 | # Safety | |
350 | if indent_spaces < 0: |
|
390 | if indent_spaces < 0: | |
351 | indent_spaces = 0 |
|
391 | indent_spaces = 0 | |
352 | #print 'safety' # dbg |
|
392 | #print 'safety' # dbg | |
353 |
|
393 | |||
354 | return indent_spaces, full_dedent |
|
394 | return indent_spaces, full_dedent | |
355 |
|
395 | |||
356 | def _update_indent(self, lines): |
|
396 | def _update_indent(self, lines): | |
357 | for line in remove_comments(lines).splitlines(): |
|
397 | for line in remove_comments(lines).splitlines(): | |
358 | if line and not line.isspace(): |
|
398 | if line and not line.isspace(): | |
359 | self.indent_spaces, self.full_dedent = self._find_indent(line) |
|
399 | self.indent_spaces, self._full_dedent = self._find_indent(line) | |
360 |
|
400 | |||
361 | def _store(self, lines): |
|
401 | def _store(self, lines): | |
362 | """Store one or more lines of input. |
|
402 | """Store one or more lines of input. | |
363 |
|
403 | |||
364 | If input lines are not newline-terminated, a newline is automatically |
|
404 | If input lines are not newline-terminated, a newline is automatically | |
365 | appended.""" |
|
405 | appended.""" | |
366 |
|
406 | |||
367 | if lines.endswith('\n'): |
|
407 | if lines.endswith('\n'): | |
368 | self._buffer.append(lines) |
|
408 | self._buffer.append(lines) | |
369 | else: |
|
409 | else: | |
370 | self._buffer.append(lines+'\n') |
|
410 | self._buffer.append(lines+'\n') | |
371 | self._set_source() |
|
411 | self._set_source() | |
372 |
|
412 | |||
373 | def _set_source(self): |
|
413 | def _set_source(self): | |
374 | self.source = ''.join(self._buffer).encode(self.encoding) |
|
414 | self.source = ''.join(self._buffer).encode(self.encoding) | |
375 |
|
@@ -1,276 +1,346 b'' | |||||
1 |
"""Tests for the |
|
1 | """Tests for the inputsplitter module. | |
2 | """ |
|
2 | """ | |
3 | #----------------------------------------------------------------------------- |
|
3 | #----------------------------------------------------------------------------- | |
4 | # Copyright (C) 2010 The IPython Development Team |
|
4 | # Copyright (C) 2010 The IPython Development Team | |
5 | # |
|
5 | # | |
6 | # Distributed under the terms of the BSD License. The full license is in |
|
6 | # Distributed under the terms of the BSD License. The full license is in | |
7 | # the file COPYING, distributed as part of this software. |
|
7 | # the file COPYING, distributed as part of this software. | |
8 | #----------------------------------------------------------------------------- |
|
8 | #----------------------------------------------------------------------------- | |
9 |
|
9 | |||
10 | #----------------------------------------------------------------------------- |
|
10 | #----------------------------------------------------------------------------- | |
11 | # Imports |
|
11 | # Imports | |
12 | #----------------------------------------------------------------------------- |
|
12 | #----------------------------------------------------------------------------- | |
13 | # stdlib |
|
13 | # stdlib | |
14 | import unittest |
|
14 | import unittest | |
15 |
|
15 | |||
16 | # Third party |
|
16 | # Third party | |
17 | import nose.tools as nt |
|
17 | import nose.tools as nt | |
18 |
|
18 | |||
19 | # Our own |
|
19 | # Our own | |
20 |
from IPython.core import |
|
20 | from IPython.core import inputsplitter as isp | |
|
21 | ||||
|
22 | #----------------------------------------------------------------------------- | |||
|
23 | # Semi-complete examples (also used as tests) | |||
|
24 | #----------------------------------------------------------------------------- | |||
|
25 | def mini_interactive_loop(raw_input): | |||
|
26 | """Minimal example of the logic of an interactive interpreter loop. | |||
|
27 | ||||
|
28 | This serves as an example, and it is used by the test system with a fake | |||
|
29 | raw_input that simulates interactive input.""" | |||
|
30 | ||||
|
31 | from IPython.core.inputsplitter import InputSplitter | |||
|
32 | ||||
|
33 | isp = InputSplitter() | |||
|
34 | # In practice, this input loop would be wrapped in an outside loop to read | |||
|
35 | # input indefinitely, until some exit/quit command was issued. Here we | |||
|
36 | # only illustrate the basic inner loop. | |||
|
37 | while isp.push_accepts_more(): | |||
|
38 | indent = ' '*isp.indent_spaces | |||
|
39 | prompt = '>>> ' + indent | |||
|
40 | line = indent + raw_input(prompt) | |||
|
41 | isp.push(line) | |||
|
42 | ||||
|
43 | # Here we just return input so we can use it in a test suite, but a real | |||
|
44 | # interpreter would instead send it for execution somewhere. | |||
|
45 | src = isp.source_reset() | |||
|
46 | print 'Input source was:\n', src | |||
|
47 | return src | |||
21 |
|
48 | |||
22 | #----------------------------------------------------------------------------- |
|
49 | #----------------------------------------------------------------------------- | |
23 | # Test utilities, just for local use |
|
50 | # Test utilities, just for local use | |
24 | #----------------------------------------------------------------------------- |
|
51 | #----------------------------------------------------------------------------- | |
25 |
|
52 | |||
26 | def assemble(block): |
|
53 | def assemble(block): | |
27 | """Assemble a block into multi-line sub-blocks.""" |
|
54 | """Assemble a block into multi-line sub-blocks.""" | |
28 | return ['\n'.join(sub_block)+'\n' for sub_block in block] |
|
55 | return ['\n'.join(sub_block)+'\n' for sub_block in block] | |
29 |
|
56 | |||
|
57 | ||||
|
58 | def pseudo_input(lines): | |||
|
59 | """Return a function that acts like raw_input but feeds the input list.""" | |||
|
60 | ilines = iter(lines) | |||
|
61 | def raw_in(prompt): | |||
|
62 | try: | |||
|
63 | return next(ilines) | |||
|
64 | except StopIteration: | |||
|
65 | return '' | |||
|
66 | return raw_in | |||
|
67 | ||||
30 | #----------------------------------------------------------------------------- |
|
68 | #----------------------------------------------------------------------------- | |
31 | # Tests |
|
69 | # Tests | |
32 | #----------------------------------------------------------------------------- |
|
70 | #----------------------------------------------------------------------------- | |
33 | def test_spaces(): |
|
71 | def test_spaces(): | |
34 | tests = [('', 0), |
|
72 | tests = [('', 0), | |
35 | (' ', 1), |
|
73 | (' ', 1), | |
36 | ('\n', 0), |
|
74 | ('\n', 0), | |
37 | (' \n', 1), |
|
75 | (' \n', 1), | |
38 | ('x', 0), |
|
76 | ('x', 0), | |
39 | (' x', 1), |
|
77 | (' x', 1), | |
40 | (' x',2), |
|
78 | (' x',2), | |
41 | (' x',4), |
|
79 | (' x',4), | |
42 | # Note: tabs are counted as a single whitespace! |
|
80 | # Note: tabs are counted as a single whitespace! | |
43 | ('\tx', 1), |
|
81 | ('\tx', 1), | |
44 | ('\t x', 2), |
|
82 | ('\t x', 2), | |
45 | ] |
|
83 | ] | |
46 |
|
84 | |||
47 | for s, nsp in tests: |
|
85 | for s, nsp in tests: | |
48 |
nt.assert_equal( |
|
86 | nt.assert_equal(isp.num_ini_spaces(s), nsp) | |
49 |
|
87 | |||
50 |
|
88 | |||
51 | def test_remove_comments(): |
|
89 | def test_remove_comments(): | |
52 | tests = [('text', 'text'), |
|
90 | tests = [('text', 'text'), | |
53 | ('text # comment', 'text '), |
|
91 | ('text # comment', 'text '), | |
54 | ('text # comment\n', 'text \n'), |
|
92 | ('text # comment\n', 'text \n'), | |
55 | ('text # comment \n', 'text \n'), |
|
93 | ('text # comment \n', 'text \n'), | |
56 | ('line # c \nline\n','line \nline\n'), |
|
94 | ('line # c \nline\n','line \nline\n'), | |
57 | ('line # c \nline#c2 \nline\nline #c\n\n', |
|
95 | ('line # c \nline#c2 \nline\nline #c\n\n', | |
58 | 'line \nline\nline\nline \n\n'), |
|
96 | 'line \nline\nline\nline \n\n'), | |
59 | ] |
|
97 | ] | |
60 |
|
98 | |||
61 | for inp, out in tests: |
|
99 | for inp, out in tests: | |
62 |
nt.assert_equal( |
|
100 | nt.assert_equal(isp.remove_comments(inp), out) | |
63 |
|
101 | |||
64 |
|
102 | |||
65 | def test_get_input_encoding(): |
|
103 | def test_get_input_encoding(): | |
66 |
encoding = |
|
104 | encoding = isp.get_input_encoding() | |
67 | nt.assert_true(isinstance(encoding, basestring)) |
|
105 | nt.assert_true(isinstance(encoding, basestring)) | |
68 | # simple-minded check that at least encoding a simple string works with the |
|
106 | # simple-minded check that at least encoding a simple string works with the | |
69 | # encoding we got. |
|
107 | # encoding we got. | |
70 | nt.assert_equal('test'.encode(encoding), 'test') |
|
108 | nt.assert_equal('test'.encode(encoding), 'test') | |
71 |
|
109 | |||
72 |
|
110 | |||
73 |
class |
|
111 | class InputSplitterTestCase(unittest.TestCase): | |
74 | def setUp(self): |
|
112 | def setUp(self): | |
75 |
self. |
|
113 | self.isp = isp.InputSplitter() | |
76 |
|
114 | |||
77 | def test_reset(self): |
|
115 | def test_reset(self): | |
78 |
|
|
116 | isp = self.isp | |
79 |
|
|
117 | isp.push('x=1') | |
80 |
|
|
118 | isp.reset() | |
81 |
self.assertEqual( |
|
119 | self.assertEqual(isp._buffer, []) | |
82 |
self.assertEqual( |
|
120 | self.assertEqual(isp.indent_spaces, 0) | |
83 |
self.assertEqual( |
|
121 | self.assertEqual(isp.source, '') | |
84 |
self.assertEqual( |
|
122 | self.assertEqual(isp.code, None) | |
85 |
self.assertEqual( |
|
123 | self.assertEqual(isp._is_complete, False) | |
86 |
|
124 | |||
87 | def test_source(self): |
|
125 | def test_source(self): | |
88 |
self. |
|
126 | self.isp._store('1') | |
89 |
self. |
|
127 | self.isp._store('2') | |
90 |
self.assertEqual(self. |
|
128 | self.assertEqual(self.isp.source, '1\n2\n') | |
91 |
self.assertTrue(len(self. |
|
129 | self.assertTrue(len(self.isp._buffer)>0) | |
92 |
self.assertEqual(self. |
|
130 | self.assertEqual(self.isp.source_reset(), '1\n2\n') | |
93 |
self.assertEqual(self. |
|
131 | self.assertEqual(self.isp._buffer, []) | |
94 |
self.assertEqual(self. |
|
132 | self.assertEqual(self.isp.source, '') | |
95 |
|
133 | |||
96 | def test_indent(self): |
|
134 | def test_indent(self): | |
97 |
|
|
135 | isp = self.isp # shorthand | |
98 |
|
|
136 | isp.push('x=1') | |
99 |
self.assertEqual( |
|
137 | self.assertEqual(isp.indent_spaces, 0) | |
100 |
|
|
138 | isp.push('if 1:\n x=1') | |
101 |
self.assertEqual( |
|
139 | self.assertEqual(isp.indent_spaces, 4) | |
102 |
|
|
140 | isp.push('y=2\n') | |
103 |
self.assertEqual( |
|
141 | self.assertEqual(isp.indent_spaces, 0) | |
104 |
|
|
142 | isp.push('if 1:') | |
105 |
self.assertEqual( |
|
143 | self.assertEqual(isp.indent_spaces, 4) | |
106 |
|
|
144 | isp.push(' x=1') | |
107 |
self.assertEqual( |
|
145 | self.assertEqual(isp.indent_spaces, 4) | |
108 | # Blank lines shouldn't change the indent level |
|
146 | # Blank lines shouldn't change the indent level | |
109 |
|
|
147 | isp.push(' '*2) | |
110 |
self.assertEqual( |
|
148 | self.assertEqual(isp.indent_spaces, 4) | |
111 |
|
149 | |||
112 | def test_indent2(self): |
|
150 | def test_indent2(self): | |
113 |
|
|
151 | isp = self.isp | |
114 | # When a multiline statement contains parens or multiline strings, we |
|
152 | # When a multiline statement contains parens or multiline strings, we | |
115 | # shouldn't get confused. |
|
153 | # shouldn't get confused. | |
116 |
|
|
154 | isp.push("if 1:") | |
117 |
|
|
155 | isp.push(" x = (1+\n 2)") | |
118 |
self.assertEqual( |
|
156 | self.assertEqual(isp.indent_spaces, 4) | |
119 |
|
157 | |||
120 | def test_dedent(self): |
|
158 | def test_dedent(self): | |
121 |
|
|
159 | isp = self.isp # shorthand | |
122 |
|
|
160 | isp.push('if 1:') | |
123 |
self.assertEqual( |
|
161 | self.assertEqual(isp.indent_spaces, 4) | |
124 |
|
|
162 | isp.push(' pass') | |
125 |
self.assertEqual( |
|
163 | self.assertEqual(isp.indent_spaces, 0) | |
126 |
|
164 | |||
127 | def test_push(self): |
|
165 | def test_push(self): | |
128 |
|
|
166 | isp = self.isp | |
129 |
|
|
167 | self.assertTrue(isp.push('x=1')) | |
130 | self.assertTrue(bb.is_complete) |
|
|||
131 |
|
168 | |||
132 | def test_push2(self): |
|
169 | def test_push2(self): | |
133 |
|
|
170 | isp = self.isp | |
134 |
|
|
171 | self.assertFalse(isp.push('if 1:')) | |
135 | self.assertFalse(bb.is_complete) |
|
|||
136 | for line in [' x=1', '# a comment', ' y=2']: |
|
172 | for line in [' x=1', '# a comment', ' y=2']: | |
137 |
|
|
173 | self.assertTrue(isp.push(line)) | |
138 | self.assertTrue(bb.is_complete) |
|
|||
139 |
|
174 | |||
140 | def test_push3(self): |
|
175 | def test_push3(self): | |
141 | """Test input with leading whitespace""" |
|
176 | """Test input with leading whitespace""" | |
142 |
|
|
177 | isp = self.isp | |
143 |
|
|
178 | isp.push(' x=1') | |
144 |
|
|
179 | isp.push(' y=2') | |
145 |
self.assertEqual( |
|
180 | self.assertEqual(isp.source, 'if 1:\n x=1\n y=2\n') | |
146 |
|
181 | |||
147 | def test_replace_mode(self): |
|
182 | def test_replace_mode(self): | |
148 |
|
|
183 | isp = self.isp | |
149 |
|
|
184 | isp.input_mode = 'replace' | |
150 |
|
|
185 | isp.push('x=1') | |
151 |
self.assertEqual( |
|
186 | self.assertEqual(isp.source, 'x=1\n') | |
152 |
|
|
187 | isp.push('x=2') | |
153 |
self.assertEqual( |
|
188 | self.assertEqual(isp.source, 'x=2\n') | |
154 |
|
189 | |||
155 |
def test_ |
|
190 | def test_push_accepts_more(self): | |
156 |
|
|
191 | isp = self.isp | |
157 |
|
|
192 | isp.push('x=1') | |
158 |
self.assert |
|
193 | self.assertFalse(isp.push_accepts_more()) | |
159 |
|
194 | |||
160 |
def test_ |
|
195 | def test_push_accepts_more2(self): | |
161 |
|
|
196 | isp = self.isp | |
162 |
|
|
197 | isp.push('if 1:') | |
163 |
self.assert |
|
198 | self.assertTrue(isp.push_accepts_more()) | |
164 |
|
|
199 | isp.push(' x=1') | |
165 |
self.assert |
|
200 | self.assertTrue(isp.push_accepts_more()) | |
166 |
|
|
201 | isp.push('') | |
167 |
self.assert |
|
202 | self.assertFalse(isp.push_accepts_more()) | |
168 |
|
203 | |||
169 |
def test_ |
|
204 | def test_push_accepts_more3(self): | |
170 |
|
|
205 | isp = self.isp | |
171 |
|
|
206 | isp.push("x = (2+\n3)") | |
172 |
self.assert |
|
207 | self.assertFalse(isp.push_accepts_more()) | |
173 |
|
208 | |||
174 |
def test_ |
|
209 | def test_push_accepts_more4(self): | |
175 |
|
|
210 | isp = self.isp | |
176 | # When a multiline statement contains parens or multiline strings, we |
|
211 | # When a multiline statement contains parens or multiline strings, we | |
177 | # shouldn't get confused. |
|
212 | # shouldn't get confused. | |
178 | # FIXME: we should be able to better handle de-dents in statements like |
|
213 | # FIXME: we should be able to better handle de-dents in statements like | |
179 | # multiline strings and multiline expressions (continued with \ or |
|
214 | # multiline strings and multiline expressions (continued with \ or | |
180 | # parens). Right now we aren't handling the indentation tracking quite |
|
215 | # parens). Right now we aren't handling the indentation tracking quite | |
181 | # correctly with this, though in practice it may not be too much of a |
|
216 | # correctly with this, though in practice it may not be too much of a | |
182 | # problem. We'll need to see. |
|
217 | # problem. We'll need to see. | |
183 |
|
|
218 | isp.push("if 1:") | |
184 |
|
|
219 | isp.push(" x = (2+") | |
185 |
|
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220 | isp.push(" 3)") | |
186 |
self.assert |
|
221 | self.assertTrue(isp.push_accepts_more()) | |
187 |
|
|
222 | isp.push(" y = 3") | |
188 |
self.assert |
|
223 | self.assertTrue(isp.push_accepts_more()) | |
189 |
|
|
224 | isp.push('') | |
190 |
self.assert |
|
225 | self.assertFalse(isp.push_accepts_more()) | |
191 |
|
226 | |||
192 | def test_syntax_error(self): |
|
227 | def test_syntax_error(self): | |
193 |
|
|
228 | isp = self.isp | |
194 | # Syntax errors immediately produce a 'ready' block, so the invalid |
|
229 | # Syntax errors immediately produce a 'ready' block, so the invalid | |
195 | # Python can be sent to the kernel for evaluation with possible ipython |
|
230 | # Python can be sent to the kernel for evaluation with possible ipython | |
196 | # special-syntax conversion. |
|
231 | # special-syntax conversion. | |
197 |
|
|
232 | isp.push('run foo') | |
198 |
self.assert |
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233 | self.assertFalse(isp.push_accepts_more()) | |
199 |
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234 | |||
200 | def check_split(self, block_lines, compile=True): |
|
235 | def check_split(self, block_lines, compile=True): | |
201 | blocks = assemble(block_lines) |
|
236 | blocks = assemble(block_lines) | |
202 | lines = ''.join(blocks) |
|
237 | lines = ''.join(blocks) | |
203 |
oblock = self. |
|
238 | oblock = self.isp.split_blocks(lines) | |
204 | self.assertEqual(oblock, blocks) |
|
239 | self.assertEqual(oblock, blocks) | |
205 | if compile: |
|
240 | if compile: | |
206 | for block in blocks: |
|
241 | for block in blocks: | |
207 |
self. |
|
242 | self.isp._compile(block) | |
208 |
|
243 | |||
209 | def test_split(self): |
|
244 | def test_split(self): | |
210 | # All blocks of input we want to test in a list. The format for each |
|
245 | # All blocks of input we want to test in a list. The format for each | |
211 | # block is a list of lists, with each inner lists consisting of all the |
|
246 | # block is a list of lists, with each inner lists consisting of all the | |
212 | # lines (as single-lines) that should make up a sub-block. |
|
247 | # lines (as single-lines) that should make up a sub-block. | |
213 |
|
248 | |||
214 | # Note: do NOT put here sub-blocks that don't compile, as the |
|
249 | # Note: do NOT put here sub-blocks that don't compile, as the | |
215 | # check_split() routine makes a final verification pass to check that |
|
250 | # check_split() routine makes a final verification pass to check that | |
216 | # each sub_block, as returned by split_blocks(), does compile |
|
251 | # each sub_block, as returned by split_blocks(), does compile | |
217 | # correctly. |
|
252 | # correctly. | |
218 | all_blocks = [ [['x=1']], |
|
253 | all_blocks = [ [['x=1']], | |
219 |
|
254 | |||
220 | [['x=1'], |
|
255 | [['x=1'], | |
221 | ['y=2']], |
|
256 | ['y=2']], | |
222 |
|
257 | |||
223 | [['x=1'], |
|
258 | [['x=1'], | |
224 | ['# a comment'], |
|
259 | ['# a comment'], | |
225 | ['y=11']], |
|
260 | ['y=11']], | |
226 |
|
261 | |||
227 | [['if 1:', |
|
262 | [['if 1:', | |
228 | ' x=1'], |
|
263 | ' x=1'], | |
229 | ['y=3']], |
|
264 | ['y=3']], | |
230 |
|
265 | |||
231 | [['def f(x):', |
|
266 | [['def f(x):', | |
232 | ' return x'], |
|
267 | ' return x'], | |
233 | ['x=1']], |
|
268 | ['x=1']], | |
234 |
|
269 | |||
235 | [['def f(x):', |
|
270 | [['def f(x):', | |
236 | ' x+=1', |
|
271 | ' x+=1', | |
237 | ' ', |
|
272 | ' ', | |
238 | ' return x'], |
|
273 | ' return x'], | |
239 | ['x=1']], |
|
274 | ['x=1']], | |
240 |
|
275 | |||
241 | [['def f(x):', |
|
276 | [['def f(x):', | |
242 | ' if x>0:', |
|
277 | ' if x>0:', | |
243 | ' y=1', |
|
278 | ' y=1', | |
244 | ' # a comment', |
|
279 | ' # a comment', | |
245 | ' else:', |
|
280 | ' else:', | |
246 | ' y=4', |
|
281 | ' y=4', | |
247 | ' ', |
|
282 | ' ', | |
248 | ' return y'], |
|
283 | ' return y'], | |
249 | ['x=1'], |
|
284 | ['x=1'], | |
250 | ['if 1:', |
|
285 | ['if 1:', | |
251 | ' y=11'] ], |
|
286 | ' y=11'] ], | |
252 |
|
287 | |||
253 | [['for i in range(10):' |
|
288 | [['for i in range(10):' | |
254 | ' x=i**2']], |
|
289 | ' x=i**2']], | |
255 |
|
290 | |||
256 | [['for i in range(10):' |
|
291 | [['for i in range(10):' | |
257 | ' x=i**2'], |
|
292 | ' x=i**2'], | |
258 | ['z = 1']], |
|
293 | ['z = 1']], | |
259 | ] |
|
294 | ] | |
260 | for block_lines in all_blocks: |
|
295 | for block_lines in all_blocks: | |
261 | self.check_split(block_lines) |
|
296 | self.check_split(block_lines) | |
262 |
|
297 | |||
263 | def test_split_syntax_errors(self): |
|
298 | def test_split_syntax_errors(self): | |
264 | # Block splitting with invalid syntax |
|
299 | # Block splitting with invalid syntax | |
265 | all_blocks = [ [['a syntax error']], |
|
300 | all_blocks = [ [['a syntax error']], | |
266 |
|
301 | |||
267 | [['x=1'], |
|
302 | [['x=1'], | |
268 | ['a syntax error']], |
|
303 | ['a syntax error']], | |
269 |
|
304 | |||
270 | [['for i in range(10):' |
|
305 | [['for i in range(10):' | |
271 | ' an error']], |
|
306 | ' an error']], | |
272 |
|
307 | |||
273 | ] |
|
308 | ] | |
274 | for block_lines in all_blocks: |
|
309 | for block_lines in all_blocks: | |
275 | self.check_split(block_lines, compile=False) |
|
310 | self.check_split(block_lines, compile=False) | |
276 |
|
311 | |||
|
312 | ||||
|
313 | class InteractiveLoopTestCase(unittest.TestCase): | |||
|
314 | """Tests for an interactive loop like a python shell. | |||
|
315 | """ | |||
|
316 | def check_ns(self, lines, ns): | |||
|
317 | """Validate that the given input lines produce the resulting namespace. | |||
|
318 | ||||
|
319 | Note: the input lines are given exactly as they would be typed in an | |||
|
320 | auto-indenting environment, as mini_interactive_loop above already does | |||
|
321 | auto-indenting and prepends spaces to the input. | |||
|
322 | """ | |||
|
323 | src = mini_interactive_loop(pseudo_input(lines)) | |||
|
324 | test_ns = {} | |||
|
325 | exec src in test_ns | |||
|
326 | # We can't check that the provided ns is identical to the test_ns, | |||
|
327 | # because Python fills test_ns with extra keys (copyright, etc). But | |||
|
328 | # we can check that the given dict is *contained* in test_ns | |||
|
329 | for k,v in ns.items(): | |||
|
330 | self.assertEqual(test_ns[k], v) | |||
|
331 | ||||
|
332 | def test_simple(self): | |||
|
333 | self.check_ns(['x=1'], dict(x=1)) | |||
|
334 | ||||
|
335 | def test_simple2(self): | |||
|
336 | self.check_ns(['if 1:', 'x=2'], dict(x=2)) | |||
|
337 | ||||
|
338 | def test_xy(self): | |||
|
339 | self.check_ns(['x=1; y=2'], dict(x=1, y=2)) | |||
|
340 | ||||
|
341 | def test_abc(self): | |||
|
342 | self.check_ns(['if 1:','a=1','b=2','c=3'], dict(a=1, b=2, c=3)) | |||
|
343 | ||||
|
344 | def test_multi(self): | |||
|
345 | self.check_ns(['x =(1+','1+','2)'], dict(x=4)) | |||
|
346 |
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