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| 1 #!/usr/bin/python |
| 2 |
| 3 """ |
| 4 Copyright 2014 Google Inc. |
| 5 |
| 6 Use of this source code is governed by a BSD-style license that can be |
| 7 found in the LICENSE file. |
| 8 |
| 9 A wrapper around the standard Python unittest library, adding features we need |
| 10 for various unittests within this directory. |
| 11 """ |
| 12 |
| 13 import os |
| 14 import subprocess |
| 15 import unittest |
| 16 |
| 17 |
| 18 class TestCase(unittest.TestCase): |
| 19 |
| 20 def shortDescription(self): |
| 21 """Tell unittest framework to not print docstrings for test cases.""" |
| 22 return None |
| 23 |
| 24 def run_command(self, args): |
| 25 """Runs a program from the command line and returns stdout. |
| 26 |
| 27 Args: |
| 28 args: Command line to run, as a list of string parameters. args[0] is the |
| 29 binary to run. |
| 30 |
| 31 Returns: |
| 32 stdout from the program, as a single string. |
| 33 |
| 34 Raises: |
| 35 Exception: the program exited with a nonzero return code. |
| 36 """ |
| 37 proc = subprocess.Popen(args, |
| 38 stdout=subprocess.PIPE, |
| 39 stderr=subprocess.PIPE) |
| 40 (stdout, stderr) = proc.communicate() |
| 41 if proc.returncode is not 0: |
| 42 raise Exception('command "%s" failed: %s' % (args, stderr)) |
| 43 return stdout |
| 44 |
| 45 def find_path_to_program(self, program): |
| 46 """Returns path to an existing program binary. |
| 47 |
| 48 Args: |
| 49 program: Basename of the program to find (e.g., 'render_pictures'). |
| 50 |
| 51 Returns: |
| 52 Absolute path to the program binary, as a string. |
| 53 |
| 54 Raises: |
| 55 Exception: unable to find the program binary. |
| 56 """ |
| 57 trunk_path = os.path.abspath(os.path.join(os.path.dirname(__file__), |
| 58 os.pardir, os.pardir)) |
| 59 possible_paths = [os.path.join(trunk_path, 'out', 'Release', program), |
| 60 os.path.join(trunk_path, 'out', 'Debug', program), |
| 61 os.path.join(trunk_path, 'out', 'Release', |
| 62 program + '.exe'), |
| 63 os.path.join(trunk_path, 'out', 'Debug', |
| 64 program + '.exe')] |
| 65 for try_path in possible_paths: |
| 66 if os.path.isfile(try_path): |
| 67 return try_path |
| 68 raise Exception('cannot find %s in paths %s; maybe you need to ' |
| 69 'build %s?' % (program, possible_paths, program)) |
| 70 |
| 71 |
| 72 def main(test_case_class): |
| 73 """Run the unit tests within the given class. |
| 74 |
| 75 Raises an Exception if any of those tests fail (in case we are running in the |
| 76 context of run_all.py, which depends on that Exception to signal failures). |
| 77 |
| 78 TODO(epoger): Make all of our unit tests use the Python unittest framework, |
| 79 so we can leverage its ability to run *all* the tests and report failures at |
| 80 the end. |
| 81 """ |
| 82 suite = unittest.TestLoader().loadTestsFromTestCase(test_case_class) |
| 83 results = unittest.TextTestRunner(verbosity=2).run(suite) |
| 84 if not results.wasSuccessful(): |
| 85 raise Exception('failed unittest %s' % test_case_class) |
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