Tools/Scripts/webkitpy/layout_tests/port/server_process_unittest.py

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import unittest

from webkitpy.layout_tests.port import server_process


class MockFile(object):
    def __init__(self, server_process):
        self._server_process = server_process

    def fileno(self):
        return 1

    def write(self, line):
        self._server_process.broken_pipes.append(self)
        raise IOError

    def close(self):
        pass


class MockProc(object):
    def __init__(self, server_process):
        self.stdin = MockFile(server_process)
        self.stdout = MockFile(server_process)
        self.stderr = MockFile(server_process)
        self.pid = 1

    def poll(self):
        return 1


class FakeServerProcess(server_process.ServerProcess):
    def _start(self):
        self._proc = MockProc(self)
        self.stdin = self._proc.stdin
        self.broken_pipes = []


class TestServerProcess(unittest.TestCase):
    def test_broken_pipe(self):
        server_process = FakeServerProcess(port_obj=None, name="test", cmd=["test"])
        server_process.write("should break")
        self.assertTrue(server_process.crashed)
        self.assertEquals(server_process._proc, None)
        self.assertEquals(server_process.broken_pipes, [server_process.stdin])


if __name__ == '__main__':
    unittest.main()