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@@ -1,104 +1,107 b'' | |||
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1 | 1 | #!/usr/bin/env python |
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2 | 2 | """ |
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3 | 3 | Tests the buffering behavior of stdio streams in `mercurial.utils.procutil`. |
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4 | 4 | """ |
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5 | 5 | from __future__ import absolute_import |
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6 | 6 | |
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7 | 7 | import contextlib |
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8 | 8 | import os |
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9 | 9 | import subprocess |
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10 | 10 | import sys |
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11 | 11 | import unittest |
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12 | 12 | |
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13 | 13 | from mercurial import pycompat |
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14 | 14 | |
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15 | 15 | |
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16 | 16 | CHILD_PROCESS = r''' |
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17 | 17 | import os |
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18 | 18 | |
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19 | 19 | from mercurial import dispatch |
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20 | 20 | from mercurial.utils import procutil |
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21 | 21 | |
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22 | 22 | dispatch.initstdio() |
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23 |
procutil. |
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24 |
os.write(procutil. |
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25 |
procutil. |
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26 |
os.write(procutil. |
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23 | procutil.{stream}.write(b'aaa') | |
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24 | os.write(procutil.{stream}.fileno(), b'[written aaa]') | |
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25 | procutil.{stream}.write(b'bbb\n') | |
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26 | os.write(procutil.{stream}.fileno(), b'[written bbb\\n]') | |
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27 | 27 | ''' |
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28 | 28 | UNBUFFERED = b'aaa[written aaa]bbb\n[written bbb\\n]' |
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29 | 29 | LINE_BUFFERED = b'[written aaa]aaabbb\n[written bbb\\n]' |
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30 | 30 | FULLY_BUFFERED = b'[written aaa][written bbb\\n]aaabbb\n' |
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31 | 31 | |
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32 | 32 | |
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33 | 33 | @contextlib.contextmanager |
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34 | 34 | def _closing(fds): |
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35 | 35 | try: |
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36 | 36 | yield |
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37 | 37 | finally: |
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38 | 38 | for fd in fds: |
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39 | 39 | try: |
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40 | 40 | os.close(fd) |
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41 | 41 | except EnvironmentError: |
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42 | 42 | pass |
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43 | 43 | |
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44 | 44 | |
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45 | 45 | @contextlib.contextmanager |
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46 | 46 | def _pipes(): |
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47 | 47 | rwpair = os.pipe() |
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48 | 48 | with _closing(rwpair): |
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49 | 49 | yield rwpair |
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50 | 50 | |
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51 | 51 | |
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52 | 52 | @contextlib.contextmanager |
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53 | 53 | def _ptys(): |
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54 | 54 | if pycompat.iswindows: |
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55 | 55 | raise unittest.SkipTest("PTYs are not supported on Windows") |
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56 | 56 | import pty |
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57 | 57 | import tty |
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58 | 58 | |
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59 | 59 | rwpair = pty.openpty() |
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60 | 60 | with _closing(rwpair): |
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61 | 61 | tty.setraw(rwpair[0]) |
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62 | 62 | yield rwpair |
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63 | 63 | |
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64 | 64 | |
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65 |
class TestStdo |
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66 | def _test(self, rwpair_generator, expected_output, python_args=[]): | |
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67 | with rwpair_generator() as (stdout_receiver, child_stdout), open( | |
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65 | class TestStdio(unittest.TestCase): | |
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66 | def _test(self, stream, rwpair_generator, expected_output, python_args=[]): | |
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67 | assert stream in ('stdout', 'stderr') | |
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68 | with rwpair_generator() as (stream_receiver, child_stream), open( | |
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68 | 69 | os.devnull, 'rb' |
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69 | 70 | ) as child_stdin: |
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70 | 71 | proc = subprocess.Popen( |
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71 |
[sys.executable] |
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72 | [sys.executable] | |
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73 | + python_args | |
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74 | + ['-c', CHILD_PROCESS.format(stream=stream)], | |
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72 | 75 | stdin=child_stdin, |
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73 | stdout=child_stdout, | |
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74 | stderr=None, | |
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76 | stdout=child_stream if stream == 'stdout' else None, | |
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77 | stderr=child_stream if stream == 'stderr' else None, | |
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75 | 78 | ) |
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76 | 79 | retcode = proc.wait() |
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77 | 80 | self.assertEqual(retcode, 0) |
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78 |
self.assertEqual(os.read(st |
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81 | self.assertEqual(os.read(stream_receiver, 1024), expected_output) | |
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79 | 82 | |
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80 | 83 | def test_stdout_pipes(self): |
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81 | self._test(_pipes, FULLY_BUFFERED) | |
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84 | self._test('stdout', _pipes, FULLY_BUFFERED) | |
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82 | 85 | |
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83 | 86 | def test_stdout_ptys(self): |
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84 | self._test(_ptys, LINE_BUFFERED) | |
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87 | self._test('stdout', _ptys, LINE_BUFFERED) | |
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85 | 88 | |
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86 | 89 | def test_stdout_pipes_unbuffered(self): |
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87 | self._test(_pipes, UNBUFFERED, python_args=['-u']) | |
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90 | self._test('stdout', _pipes, UNBUFFERED, python_args=['-u']) | |
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88 | 91 | |
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89 | 92 | def test_stdout_ptys_unbuffered(self): |
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90 | self._test(_ptys, UNBUFFERED, python_args=['-u']) | |
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93 | self._test('stdout', _ptys, UNBUFFERED, python_args=['-u']) | |
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91 | 94 | |
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92 | 95 | if not pycompat.ispy3 and not pycompat.iswindows: |
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93 | 96 | # On Python 2 on non-Windows, we manually open stdout in line-buffered |
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94 | 97 | # mode if connected to a TTY. We should check if Python was configured |
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95 | 98 | # to use unbuffered stdout, but it's hard to do that. |
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96 | 99 | test_stdout_ptys_unbuffered = unittest.expectedFailure( |
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97 | 100 | test_stdout_ptys_unbuffered |
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98 | 101 | ) |
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99 | 102 | |
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100 | 103 | |
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101 | 104 | if __name__ == '__main__': |
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102 | 105 | import silenttestrunner |
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103 | 106 | |
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104 | 107 | silenttestrunner.main(__name__) |
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