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1 | 1 | # encoding: utf-8 |
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2 | 2 | """ |
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3 | 3 | Test process execution and IO redirection. |
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4 | 4 | """ |
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5 | 5 | |
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6 | 6 | __docformat__ = "restructuredtext en" |
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7 | 7 | |
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8 | 8 | #------------------------------------------------------------------------------- |
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9 | 9 | # Copyright (C) 2008 The IPython Development Team |
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10 | 10 | # |
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11 | 11 | # Distributed under the terms of the BSD License. The full license is |
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12 | 12 | # in the file COPYING, distributed as part of this software. |
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13 | 13 | #------------------------------------------------------------------------------- |
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14 | 14 | |
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15 | 15 | from copy import copy, deepcopy |
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16 | 16 | from cStringIO import StringIO |
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17 | 17 | import string |
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18 | 18 | import sys |
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19 | 19 | |
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20 | 20 | from nose.tools import assert_equal |
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21 | 21 | |
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22 | 22 | from IPython.frontend.prefilterfrontend import PrefilterFrontEnd |
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23 |
from IPython. |
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23 | from IPython.testing.globalipapp import get_ipython | |
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24 | 24 | from IPython.testing.tools import default_argv |
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25 | 25 | |
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26 | 26 | #----------------------------------------------------------------------------- |
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27 | 27 | # Support utilities |
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28 | 28 | #----------------------------------------------------------------------------- |
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29 | 29 | |
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30 | 30 | class TestPrefilterFrontEnd(PrefilterFrontEnd): |
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31 | 31 | |
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32 | 32 | input_prompt_template = string.Template('') |
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33 | 33 | output_prompt_template = string.Template('') |
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34 | 34 | banner = '' |
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35 | 35 | |
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36 | 36 | def __init__(self): |
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37 | 37 | self.out = StringIO() |
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38 | 38 | PrefilterFrontEnd.__init__(self,argv=default_argv()) |
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39 | 39 | # Some more code for isolation (yeah, crazy) |
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40 | 40 | self._on_enter() |
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41 | 41 | self.out.flush() |
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42 | 42 | self.out.reset() |
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43 | 43 | self.out.truncate() |
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44 | 44 | |
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45 | 45 | def write(self, string, *args, **kwargs): |
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46 | 46 | self.out.write(string) |
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47 | 47 | |
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48 | 48 | def _on_enter(self): |
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49 | 49 | self.input_buffer += '\n' |
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50 | 50 | PrefilterFrontEnd._on_enter(self) |
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51 | 51 | |
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52 | 52 | |
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53 | 53 | def isolate_ipython0(func): |
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54 | 54 | """ Decorator to isolate execution that involves an iptyhon0. |
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55 | 55 | |
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56 | 56 | Notes |
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57 | 57 | ----- |
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58 | 58 | |
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59 | 59 | Apply only to functions with no arguments. Nose skips functions |
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60 | 60 | with arguments. |
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61 | 61 | """ |
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62 | 62 | def my_func(): |
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63 |
ip0 = get_ipython |
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63 | ip0 = get_ipython() | |
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64 | 64 | if ip0 is None: |
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65 | 65 | return func() |
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66 | 66 | # We have a real ipython running... |
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67 | 67 | user_ns = ip0.user_ns |
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68 | 68 | user_global_ns = ip0.user_global_ns |
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69 | 69 | |
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70 | 70 | # Previously the isolation was attempted with a deep copy of the user |
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71 | 71 | # dicts, but we found cases where this didn't work correctly. I'm not |
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72 | 72 | # quite sure why, but basically it did damage the user namespace, such |
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73 | 73 | # that later tests stopped working correctly. Instead we use a simpler |
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74 | 74 | # approach, just computing the list of added keys to the namespace and |
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75 | 75 | # eliminating those afterwards. Existing keys that may have been |
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76 | 76 | # modified remain modified. So far this has proven to be robust. |
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77 | 77 | |
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78 | 78 | # Compute set of old local/global keys |
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79 | 79 | old_locals = set(user_ns.keys()) |
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80 | 80 | old_globals = set(user_global_ns.keys()) |
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81 | 81 | try: |
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82 | 82 | out = func() |
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83 | 83 | finally: |
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84 | 84 | # Find new keys, and if any, remove them |
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85 | 85 | new_locals = set(user_ns.keys()) - old_locals |
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86 | 86 | new_globals = set(user_global_ns.keys()) - old_globals |
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87 | 87 | for k in new_locals: |
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88 | 88 | del user_ns[k] |
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89 | 89 | for k in new_globals: |
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90 | 90 | del user_global_ns[k] |
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91 | 91 | return out |
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92 | 92 | |
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93 | 93 | my_func.__name__ = func.__name__ |
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94 | 94 | return my_func |
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95 | 95 | |
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96 | 96 | #----------------------------------------------------------------------------- |
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97 | 97 | # Tests |
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98 | 98 | #----------------------------------------------------------------------------- |
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99 | 99 | |
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100 | 100 | @isolate_ipython0 |
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101 | 101 | def test_execution(): |
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102 | 102 | """ Test execution of a command. |
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103 | 103 | """ |
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104 | 104 | f = TestPrefilterFrontEnd() |
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105 | 105 | f.input_buffer = 'print(1)' |
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106 | 106 | f._on_enter() |
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107 | 107 | out_value = f.out.getvalue() |
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108 | 108 | assert_equal(out_value, '1\n') |
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109 | 109 | |
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110 | 110 | |
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111 | 111 | @isolate_ipython0 |
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112 | 112 | def test_multiline(): |
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113 | 113 | """ Test execution of a multiline command. |
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114 | 114 | """ |
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115 | 115 | f = TestPrefilterFrontEnd() |
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116 | 116 | f.input_buffer = 'if True:' |
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117 | 117 | f._on_enter() |
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118 | 118 | f.input_buffer += 'print 1' |
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119 | 119 | f._on_enter() |
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120 | 120 | out_value = f.out.getvalue() |
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121 | 121 | yield assert_equal, out_value, '' |
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122 | 122 | f._on_enter() |
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123 | 123 | out_value = f.out.getvalue() |
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124 | 124 | yield assert_equal, out_value, '1\n' |
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125 | 125 | f = TestPrefilterFrontEnd() |
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126 | 126 | f.input_buffer='(1 +' |
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127 | 127 | f._on_enter() |
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128 | 128 | f.input_buffer += '0)' |
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129 | 129 | f._on_enter() |
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130 | 130 | out_value = f.out.getvalue() |
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131 | 131 | yield assert_equal, out_value, '' |
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132 | 132 | f._on_enter() |
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133 | 133 | out_value = f.out.getvalue() |
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134 | 134 | yield assert_equal, out_value, '1\n' |
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135 | 135 | |
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136 | 136 | |
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137 | 137 | @isolate_ipython0 |
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138 | 138 | def test_capture(): |
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139 | 139 | """ Test the capture of output in different channels. |
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140 | 140 | """ |
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141 | 141 | # Test on the OS-level stdout, stderr. |
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142 | 142 | f = TestPrefilterFrontEnd() |
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143 | 143 | f.input_buffer = \ |
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144 | 144 | 'import os; out=os.fdopen(1, "w"); out.write("1") ; out.flush()' |
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145 | 145 | f._on_enter() |
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146 | 146 | out_value = f.out.getvalue() |
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147 | 147 | yield assert_equal, out_value, '1' |
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148 | 148 | f = TestPrefilterFrontEnd() |
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149 | 149 | f.input_buffer = \ |
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150 | 150 | 'import os; out=os.fdopen(2, "w"); out.write("1") ; out.flush()' |
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151 | 151 | f._on_enter() |
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152 | 152 | out_value = f.out.getvalue() |
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153 | 153 | yield assert_equal, out_value, '1' |
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154 | 154 | |
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155 | 155 | |
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156 | 156 | @isolate_ipython0 |
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157 | 157 | def test_magic(): |
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158 | 158 | """ Test the magic expansion and history. |
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159 | 159 | |
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160 | 160 | This test is fairly fragile and will break when magics change. |
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161 | 161 | """ |
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162 | 162 | f = TestPrefilterFrontEnd() |
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163 | 163 | # Before checking the interactive namespace, make sure it's clear (it can |
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164 | 164 | # otherwise pick up things stored in the user's local db) |
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165 | 165 | f.input_buffer += '%reset -f' |
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166 | 166 | f._on_enter() |
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167 | 167 | f.complete_current_input() |
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168 | 168 | # Now, run the %who magic and check output |
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169 | 169 | f.input_buffer += '%who' |
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170 | 170 | f._on_enter() |
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171 | 171 | out_value = f.out.getvalue() |
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172 | 172 | assert_equal(out_value, 'Interactive namespace is empty.\n') |
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173 | 173 | |
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174 | 174 | |
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175 | 175 | @isolate_ipython0 |
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176 | 176 | def test_help(): |
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177 | 177 | """ Test object inspection. |
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178 | 178 | """ |
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179 | 179 | f = TestPrefilterFrontEnd() |
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180 | 180 | f.input_buffer += "def f():" |
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181 | 181 | f._on_enter() |
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182 | 182 | f.input_buffer += "'foobar'" |
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183 | 183 | f._on_enter() |
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184 | 184 | f.input_buffer += "pass" |
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185 | 185 | f._on_enter() |
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186 | 186 | f._on_enter() |
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187 | 187 | f.input_buffer += "f?" |
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188 | 188 | f._on_enter() |
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189 | 189 | assert 'traceback' not in f.last_result |
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190 | 190 | ## XXX: ipython doctest magic breaks this. I have no clue why |
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191 | 191 | #out_value = f.out.getvalue() |
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192 | 192 | #assert out_value.split()[-1] == 'foobar' |
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193 | 193 | |
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194 | 194 | |
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195 | 195 | @isolate_ipython0 |
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196 | 196 | def test_completion_simple(): |
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197 | 197 | """ Test command-line completion on trivial examples. |
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198 | 198 | """ |
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199 | 199 | f = TestPrefilterFrontEnd() |
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200 | 200 | f.input_buffer = 'zzza = 1' |
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201 | 201 | f._on_enter() |
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202 | 202 | f.input_buffer = 'zzzb = 2' |
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203 | 203 | f._on_enter() |
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204 | 204 | f.input_buffer = 'zz' |
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205 | 205 | f.complete_current_input() |
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206 | 206 | out_value = f.out.getvalue() |
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207 | 207 | yield assert_equal, out_value, '\nzzza zzzb ' |
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208 | 208 | yield assert_equal, f.input_buffer, 'zzz' |
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209 | 209 | |
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210 | 210 | |
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211 | 211 | @isolate_ipython0 |
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212 | 212 | def test_completion_parenthesis(): |
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213 | 213 | """ Test command-line completion when a parenthesis is open. |
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214 | 214 | """ |
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215 | 215 | f = TestPrefilterFrontEnd() |
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216 | 216 | f.input_buffer = 'zzza = 1' |
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217 | 217 | f._on_enter() |
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218 | 218 | f.input_buffer = 'zzzb = 2' |
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219 | 219 | f._on_enter() |
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220 | 220 | f.input_buffer = 'map(zz' |
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221 | 221 | f.complete_current_input() |
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222 | 222 | out_value = f.out.getvalue() |
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223 | 223 | yield assert_equal, out_value, '\nzzza zzzb ' |
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224 | 224 | yield assert_equal, f.input_buffer, 'map(zzz' |
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225 | 225 | |
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226 | 226 | |
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227 | 227 | @isolate_ipython0 |
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228 | 228 | def test_completion_indexing(): |
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229 | 229 | """ Test command-line completion when indexing on objects. |
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230 | 230 | """ |
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231 | 231 | f = TestPrefilterFrontEnd() |
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232 | 232 | f.input_buffer = 'a = [0]' |
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233 | 233 | f._on_enter() |
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234 | 234 | f.input_buffer = 'a[0].' |
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235 | 235 | f.complete_current_input() |
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236 | 236 | |
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237 | 237 | if sys.version_info[:2] >= (2,6): |
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238 | 238 | # In Python 2.6, ints picked up a few non __ methods, so now there are |
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239 | 239 | # no completions. |
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240 | 240 | assert_equal(f.input_buffer, 'a[0].') |
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241 | 241 | else: |
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242 | 242 | # Right answer for 2.4/2.5 |
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243 | 243 | assert_equal(f.input_buffer, 'a[0].__') |
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244 | 244 | |
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245 | 245 | |
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246 | 246 | @isolate_ipython0 |
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247 | 247 | def test_completion_equal(): |
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248 | 248 | """ Test command-line completion when the delimiter is "=", not " ". |
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249 | 249 | """ |
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250 | 250 | f = TestPrefilterFrontEnd() |
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251 | 251 | f.input_buffer = 'a=1.' |
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252 | 252 | f.complete_current_input() |
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253 | 253 | if sys.version_info[:2] >= (2,6): |
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254 | 254 | # In Python 2.6, ints picked up a few non __ methods, so now there are |
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255 | 255 | # no completions. |
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256 | 256 | assert_equal(f.input_buffer, 'a=1.') |
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257 | 257 | else: |
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258 | 258 | # Right answer for 2.4/2.5 |
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259 | 259 | assert_equal(f.input_buffer, 'a=1.__') |
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260 | 260 | |
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261 | 261 | |
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262 | 262 | if __name__ == '__main__': |
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263 | 263 | test_magic() |
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264 | 264 | test_help() |
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265 | 265 | test_execution() |
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266 | 266 | test_multiline() |
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267 | 267 | test_capture() |
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268 | 268 | test_completion_simple() |
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269 | 269 | test_completion_complex() |
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