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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 cStringIO import StringIO |
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16 | 16 | import string |
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17 | 17 | |
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18 | 18 | from IPython.ipapi import get as get_ipython0 |
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19 | 19 | from IPython.frontend.prefilterfrontend import PrefilterFrontEnd |
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20 | from copy import deepcopy | |
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20 | 21 | |
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21 | 22 | class TestPrefilterFrontEnd(PrefilterFrontEnd): |
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22 | 23 | |
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23 | 24 | input_prompt_template = string.Template('') |
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24 | 25 | output_prompt_template = string.Template('') |
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25 | 26 | banner = '' |
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26 | 27 | |
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27 | 28 | def __init__(self): |
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28 | 29 | ipython0 = get_ipython0().IP |
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29 | 30 | self.out = StringIO() |
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30 | 31 | PrefilterFrontEnd.__init__(self, ipython0=ipython0) |
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31 | 32 | # Clean up the namespace for isolation between tests |
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32 | 33 | user_ns = self.ipython0.user_ns |
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33 | 34 | # We need to keep references to things so that they don't |
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34 | 35 | # get garbage collected (this stinks). |
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35 | 36 | self.shadow_ns = dict() |
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36 | 37 | for i in self.ipython0.magic_who_ls(): |
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37 | 38 | self.shadow_ns[i] = user_ns.pop(i) |
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38 | 39 | # Some more code for isolation (yeah, crazy) |
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39 | 40 | self._on_enter() |
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40 | 41 | self.out.flush() |
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41 | 42 | self.out.reset() |
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42 | 43 | self.out.truncate() |
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43 | 44 | |
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44 | 45 | def write(self, string, *args, **kwargs): |
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45 | 46 | self.out.write(string) |
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46 | 47 | |
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47 | 48 | def _on_enter(self): |
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48 | 49 | self.input_buffer += '\n' |
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49 | 50 | PrefilterFrontEnd._on_enter(self) |
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50 | 51 | |
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51 | 52 | |
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52 | 53 | def isolate_ipython0(func): |
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53 | 54 | """ Decorator to isolate execution that involves an iptyhon0. |
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54 | 55 | """ |
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55 | 56 | def my_func(*args, **kwargs): |
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56 | 57 | ipython0 = get_ipython0().IP |
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57 | user_ns = ipython0.user_ns | |
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58 | global_ns = ipython0.global_ns | |
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59 | func(*args, **kwargs) | |
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60 | ipython0.user_ns = user_ns | |
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61 | ipython0.global_ns = global_ns | |
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58 | user_ns = deepcopy(ipython0.user_ns) | |
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59 | global_ns = deepcopy(ipython0.global_ns) | |
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60 | try: | |
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61 | func(*args, **kwargs) | |
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62 | finally: | |
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63 | ipython0.user_ns = user_ns | |
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64 | ipython0.global_ns = global_ns | |
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62 | 65 | |
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63 | 66 | return my_func |
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64 | 67 | |
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65 | 68 | |
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66 | 69 | @isolate_ipython0 |
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67 | 70 | def test_execution(): |
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68 | 71 | """ Test execution of a command. |
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69 | 72 | """ |
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70 | 73 | f = TestPrefilterFrontEnd() |
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71 | 74 | f.input_buffer = 'print 1' |
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72 | 75 | f._on_enter() |
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73 | 76 | out_value = f.out.getvalue() |
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74 | 77 | assert out_value == '1\n' |
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75 | 78 | |
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76 | 79 | |
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77 | 80 | @isolate_ipython0 |
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78 | 81 | def test_multiline(): |
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79 | 82 | """ Test execution of a multiline command. |
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80 | 83 | """ |
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81 | 84 | f = TestPrefilterFrontEnd() |
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82 | 85 | f.input_buffer = 'if True:' |
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83 | 86 | f._on_enter() |
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84 | 87 | f.input_buffer += 'print 1' |
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85 | 88 | f._on_enter() |
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86 | 89 | out_value = f.out.getvalue() |
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87 | 90 | assert out_value == '' |
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88 | 91 | f._on_enter() |
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89 | 92 | out_value = f.out.getvalue() |
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90 | 93 | assert out_value == '1\n' |
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91 | 94 | f = TestPrefilterFrontEnd() |
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92 | 95 | f.input_buffer='(1 +' |
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93 | 96 | f._on_enter() |
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94 | 97 | f.input_buffer += '0)' |
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95 | 98 | f._on_enter() |
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96 | 99 | out_value = f.out.getvalue() |
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97 | 100 | assert out_value == '' |
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98 | 101 | f._on_enter() |
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99 | 102 | out_value = f.out.getvalue() |
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100 | 103 | assert out_value == '1\n' |
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101 | 104 | |
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102 | 105 | |
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103 | 106 | @isolate_ipython0 |
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104 | 107 | def test_capture(): |
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105 | 108 | """ Test the capture of output in different channels. |
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106 | 109 | """ |
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107 | 110 | # Test on the OS-level stdout, stderr. |
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108 | 111 | f = TestPrefilterFrontEnd() |
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109 | 112 | f.input_buffer = \ |
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110 | 113 | 'import os; out=os.fdopen(1, "w"); out.write("1") ; out.flush()' |
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111 | 114 | f._on_enter() |
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112 | 115 | out_value = f.out.getvalue() |
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113 | 116 | assert out_value == '1' |
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114 | 117 | f = TestPrefilterFrontEnd() |
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115 | 118 | f.input_buffer = \ |
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116 | 119 | 'import os; out=os.fdopen(2, "w"); out.write("1") ; out.flush()' |
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117 | 120 | f._on_enter() |
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118 | 121 | out_value = f.out.getvalue() |
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119 | 122 | assert out_value == '1' |
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120 | 123 | |
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121 | 124 | |
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122 | 125 | @isolate_ipython0 |
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123 | 126 | def test_magic(): |
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124 | 127 | """ Test the magic expansion and history. |
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125 | 128 | |
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126 | 129 | This test is fairly fragile and will break when magics change. |
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127 | 130 | """ |
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128 | 131 | f = TestPrefilterFrontEnd() |
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129 | 132 | f.input_buffer += '%who' |
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130 | 133 | f._on_enter() |
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131 | 134 | out_value = f.out.getvalue() |
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132 | 135 | assert out_value == 'Interactive namespace is empty.\n' |
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133 | 136 | |
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134 | 137 | |
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135 | 138 | @isolate_ipython0 |
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136 | 139 | def test_help(): |
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137 | 140 | """ Test object inspection. |
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138 | 141 | """ |
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139 | 142 | f = TestPrefilterFrontEnd() |
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140 | 143 | f.input_buffer += "def f():" |
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141 | 144 | f._on_enter() |
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142 | 145 | f.input_buffer += "'foobar'" |
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143 | 146 | f._on_enter() |
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144 | 147 | f.input_buffer += "pass" |
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145 | 148 | f._on_enter() |
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146 | 149 | f._on_enter() |
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147 | 150 | f.input_buffer += "f?" |
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148 | 151 | f._on_enter() |
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149 | 152 | assert 'traceback' not in f.last_result |
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150 | 153 | ## XXX: ipython doctest magic breaks this. I have no clue why |
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151 | 154 | #out_value = f.out.getvalue() |
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152 | 155 | #assert out_value.split()[-1] == 'foobar' |
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153 | 156 | |
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154 | 157 | |
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155 | 158 | @isolate_ipython0 |
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156 | 159 | def test_completion(): |
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157 | 160 | """ Test command-line completion. |
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158 | 161 | """ |
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159 | 162 | f = TestPrefilterFrontEnd() |
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160 | 163 | f.input_buffer = 'zzza = 1' |
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161 | 164 | f._on_enter() |
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162 | 165 | f.input_buffer = 'zzzb = 2' |
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163 | 166 | f._on_enter() |
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164 | 167 | f.input_buffer = 'zz' |
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165 | 168 | f.complete_current_input() |
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166 | 169 | out_value = f.out.getvalue() |
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167 | 170 | assert out_value == '\nzzza zzzb ' |
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168 | 171 | assert f.input_buffer == 'zzz' |
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169 | 172 | |
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170 | 173 | |
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171 | 174 | if __name__ == '__main__': |
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172 | 175 | test_magic() |
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173 | 176 | test_help() |
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174 | 177 | test_execution() |
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175 | 178 | test_multiline() |
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176 | 179 | test_capture() |
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177 | 180 | test_completion() |
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