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import sys
import unittest

from webkitpy.layout_tests.port import server_process
from webkitpy.common.system.executive import ScriptError
from webkitpy.common.system.executive_mock import MockExecutive2
from webkitpy.common.system.outputcapture import OutputCapture


def _logging_run_command(args):
    print args


def _throwing_run_command(args):
    raise ScriptError("MOCK script error")


class TrivialMockPort(object):
    def results_directory(self):
        return "/mock-results"

    def check_for_leaks(self, process_name, process_pid):
        pass


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=TrivialMockPort(), name="test", cmd=["test"])
        server_process.write("should break")
        self.assertTrue(server_process.has_crashed())
        self.assertEquals(server_process._proc, None)
        self.assertEquals(server_process.broken_pipes, [server_process.stdin])

    def test_sample_process(self):
        # Currently, sample-on-timeout only works on Darwin.
        if sys.platform != "darwin":
            return
        server_process = FakeServerProcess(port_obj=TrivialMockPort(), name="test", cmd=["test"], executive=MockExecutive2(run_command_fn=_logging_run_command))
        server_process._proc = MockProc(server_process)
        expected_stdout = "['/usr/bin/sample', 1, 10, 10, '-file', '/mock-results/test-1.sample.txt']\n"
        OutputCapture().assert_outputs(self, server_process._sample, expected_stdout=expected_stdout)

    def test_sample_process_throws_exception(self):
        # Currently, sample-on-timeout only works on Darwin.
        if sys.platform != "darwin":
            return
        server_process = FakeServerProcess(port_obj=TrivialMockPort(), name="test", cmd=["test"], executive=MockExecutive2(run_command_fn=_throwing_run_command))
        server_process._proc = MockProc(server_process)
        OutputCapture().assert_outputs(self, server_process._sample)