# Copyright (C) 2010 Google Inc. All rights reserved.
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import unittest
import StringIO

from webkitpy.common.system import logtesting
from webkitpy.common.system import executive_mock
from webkitpy.common.system import filesystem_mock
from webkitpy.tool import mocktool
from webkitpy.thirdparty.mock import Mock


import chromium
import chromium_linux
import chromium_mac
import chromium_win

from webkitpy.layout_tests.port import port_testcase


class ChromiumDriverTest(unittest.TestCase):
    def setUp(self):
        mock_port = Mock()
        mock_port.get_option = lambda option_name: ''
        self.driver = chromium.ChromiumDriver(mock_port, worker_number=0)

    def test_test_shell_command(self):
        expected_command = "test.html 2 checksum\n"
        self.assertEqual(self.driver._test_shell_command("test.html", 2, "checksum"), expected_command)

    def _assert_write_command_and_read_line(self, input=None, expected_line=None, expected_stdin=None, expected_crash=False):
        if not expected_stdin:
            if input:
                expected_stdin = input
            else:
                # We reset stdin, so we should expect stdin.getValue = ""
                expected_stdin = ""
        self.driver._proc.stdin = StringIO.StringIO()
        line, did_crash = self.driver._write_command_and_read_line(input)
        self.assertEqual(self.driver._proc.stdin.getvalue(), expected_stdin)
        self.assertEqual(line, expected_line)
        self.assertEqual(did_crash, expected_crash)

    def test_write_command_and_read_line(self):
        self.driver._proc = Mock()
        # Set up to read 3 lines before we get an IOError
        self.driver._proc.stdout = StringIO.StringIO("first\nsecond\nthird\n")

        unicode_input = u"I \u2661 Unicode"
        utf8_input = unicode_input.encode("utf-8")
        # Test unicode input conversion to utf-8
        self._assert_write_command_and_read_line(input=unicode_input, expected_stdin=utf8_input, expected_line="first\n")
        # Test str() input.
        self._assert_write_command_and_read_line(input="foo", expected_line="second\n")
        # Test input=None
        self._assert_write_command_and_read_line(expected_line="third\n")
        # Test reading from a closed/empty stream.
        # reading from a StringIO does not raise IOError like a real file would, so raise IOError manually.
        def mock_readline():
            raise IOError
        self.driver._proc.stdout.readline = mock_readline
        self._assert_write_command_and_read_line(expected_crash=True)

    def test_stop(self):
        self.pid = None
        self.wait_called = False
        self.driver._proc = Mock()
        self.driver._proc.pid = 1
        self.driver._proc.stdin = StringIO.StringIO()
        self.driver._proc.stdout = StringIO.StringIO()
        self.driver._proc.stderr = StringIO.StringIO()
        self.driver._proc.poll = lambda: None

        def fake_wait():
            self.assertTrue(self.pid is not None)
            self.wait_called = True

        self.driver._proc.wait = fake_wait

        class FakeExecutive(object):
            def kill_process(other, pid):
                self.pid = pid
                self.driver._proc.poll = lambda: 2

        self.driver._port._executive = FakeExecutive()
        self.driver.KILL_TIMEOUT = 0.01
        self.driver.stop()
        self.assertTrue(self.wait_called)
        self.assertEquals(self.pid, 1)


class ChromiumPortTest(port_testcase.PortTestCase):
    def port_maker(self, platform):
        return chromium.ChromiumPort

    def test_driver_cmd_line(self):
        # Override this test since ChromiumPort doesn't implement driver_cmd_line().
        pass

    def test_check_build(self):
        # Override this test since ChromiumPort doesn't implement _path_to_driver().
        pass

    def test_check_wdiff(self):
        # Override this test since ChromiumPort doesn't implement _path_to_driver().
        pass

    class TestMacPort(chromium_mac.ChromiumMacPort):
        def __init__(self, options):
            # FIXME: This should use MockExecutive and MockUser as well.
            chromium_mac.ChromiumMacPort.__init__(self,
                                                  options=options,
                                                  filesystem=filesystem_mock.MockFileSystem())

        def default_configuration(self):
            self.default_configuration_called = True
            return 'default'

    class TestLinuxPort(chromium_linux.ChromiumLinuxPort):
        def __init__(self, options):
            # FIXME: This should use MockExecutive and MockUser as well.
            chromium_linux.ChromiumLinuxPort.__init__(self,
                                                      options=options,
                                                      filesystem=filesystem_mock.MockFileSystem())

        def default_configuration(self):
            self.default_configuration_called = True
            return 'default'

    class TestWinPort(chromium_win.ChromiumWinPort):
        def __init__(self, options):
            # FIXME: This should use MockExecutive and MockUser as well.
            chromium_win.ChromiumWinPort.__init__(self,
                                                  options=options,
                                                  filesystem=filesystem_mock.MockFileSystem())

        def default_configuration(self):
            self.default_configuration_called = True
            return 'default'

    def test_path_to_image_diff(self):
        mock_options = mocktool.MockOptions()
        port = ChromiumPortTest.TestLinuxPort(options=mock_options)
        self.assertTrue(port._path_to_image_diff().endswith(
            '/out/default/ImageDiff'))
        port = ChromiumPortTest.TestMacPort(options=mock_options)
        self.assertTrue(port._path_to_image_diff().endswith(
            '/xcodebuild/default/ImageDiff'))
        port = ChromiumPortTest.TestWinPort(options=mock_options)
        self.assertTrue(port._path_to_image_diff().endswith(
            '/default/ImageDiff.exe'))

    def test_skipped_layout_tests(self):
        mock_options = mocktool.MockOptions()
        mock_options.configuration = 'release'
        port = ChromiumPortTest.TestLinuxPort(options=mock_options)

        fake_test = 'fast/js/not-good.js'

        port.test_expectations = lambda: """BUG_TEST SKIP : fast/js/not-good.js = TEXT
LINUX WIN : fast/js/very-good.js = TIMEOUT PASS"""
        port.test_expectations_overrides = lambda: ''
        port.tests = lambda paths: set()
        port.test_exists = lambda test: True

        skipped_tests = port.skipped_layout_tests(extra_test_files=[fake_test, ])
        self.assertTrue("fast/js/not-good.js" in skipped_tests)

    def test_default_configuration(self):
        mock_options = mocktool.MockOptions()
        port = ChromiumPortTest.TestLinuxPort(options=mock_options)
        self.assertEquals(mock_options.configuration, 'default')
        self.assertTrue(port.default_configuration_called)

        mock_options = mocktool.MockOptions(configuration=None)
        port = ChromiumPortTest.TestLinuxPort(mock_options)
        self.assertEquals(mock_options.configuration, 'default')
        self.assertTrue(port.default_configuration_called)

    def test_diff_image(self):
        class TestPort(ChromiumPortTest.TestLinuxPort):
            def _path_to_image_diff(self):
                return "/path/to/image_diff"

        mock_options = mocktool.MockOptions()
        port = ChromiumPortTest.TestLinuxPort(mock_options)

        mock_image_diff = "MOCK Image Diff"

        def mock_run_command(args):
            port._filesystem.write_binary_file(args[4], mock_image_diff)
            return 1

        # Images are different.
        port._executive = executive_mock.MockExecutive2(run_command_fn=mock_run_command)
        self.assertEquals(mock_image_diff, port.diff_image("EXPECTED", "ACTUAL"))

        # Images are the same.
        port._executive = executive_mock.MockExecutive2(exit_code=0)
        self.assertEquals(None, port.diff_image("EXPECTED", "ACTUAL"))

        # There was some error running image_diff.
        port._executive = executive_mock.MockExecutive2(exit_code=2)
        exception_raised = False
        try:
            port.diff_image("EXPECTED", "ACTUAL")
        except ValueError, e:
            exception_raised = True
        self.assertFalse(exception_raised)

    def test_overrides_and_builder_names(self):
        port = self.make_port()
        if not port:
            return

        filesystem = filesystem_mock.MockFileSystem()
        port._filesystem = filesystem
        port.path_from_chromium_base = lambda *comps: '/' + '/'.join(comps)

        overrides_path = port.path_from_chromium_base('webkit', 'tools', 'layout_tests', 'test_expectations.txt')
        OVERRIDES = 'foo'
        filesystem.files[overrides_path] = OVERRIDES

        port._options.builder_name = 'DUMMY_BUILDER_NAME'
        self.assertEquals(port.test_expectations_overrides(), OVERRIDES)

        port._options.builder_name = 'builder (deps)'
        self.assertEquals(port.test_expectations_overrides(), OVERRIDES)

        port._options.builder_name = 'builder'
        self.assertEquals(port.test_expectations_overrides(), None)


class ChromiumPortLoggingTest(logtesting.LoggingTestCase):
    def test_check_sys_deps(self):
        mock_options = mocktool.MockOptions()
        port = ChromiumPortTest.TestLinuxPort(options=mock_options)

        # Success
        port._executive = executive_mock.MockExecutive2(exit_code=0)
        self.assertTrue(port.check_sys_deps(needs_http=False))

        # Failure
        port._executive = executive_mock.MockExecutive2(exit_code=1,
            output='testing output failure')
        self.assertFalse(port.check_sys_deps(needs_http=False))
        self.assertLog([
            'ERROR: System dependencies check failed.\n',
            'ERROR: To override, invoke with --nocheck-sys-deps\n',
            'ERROR: \n',
            'ERROR: testing output failure\n'])

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