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import unittest

from webkitpy.layout_tests.models.test_failures import (
    ALL_FAILURE_CLASSES, determine_result_type,
    FailureCrash, FailureTimeout, TestFailure
)


class TestFailuresTest(unittest.TestCase):

    def assert_loads(self, cls):
        failure_obj = cls()
        s = failure_obj.dumps()
        new_failure_obj = TestFailure.loads(s)
        self.assertIsInstance(new_failure_obj, cls)

        self.assertEqual(failure_obj, new_failure_obj)

        # Also test that != is implemented.
        self.assertFalse(failure_obj != new_failure_obj)

    def test_unknown_failure_type(self):
        class UnknownFailure(TestFailure):

            def message(self):
                return ''

        failure_obj = UnknownFailure()
        self.assertRaises(ValueError, determine_result_type, [failure_obj])

    def test_message_is_virtual(self):
        failure_obj = TestFailure()
        self.assertRaises(NotImplementedError, failure_obj.message)

    def test_loads(self):
        for c in ALL_FAILURE_CLASSES:
            self.assert_loads(c)

    def test_equals(self):
        self.assertEqual(FailureCrash(), FailureCrash())
        self.assertNotEqual(FailureCrash(), FailureTimeout())
        crash_set = set([FailureCrash(), FailureCrash()])
        self.assertEqual(len(crash_set), 1)
        # The hash happens to be the name of the class, but sets still work:
        crash_set = set([FailureCrash(), 'FailureCrash'])
        self.assertEqual(len(crash_set), 2)

    def test_crashes(self):
        self.assertEqual(FailureCrash().message(), 'content_shell crashed')
        self.assertEqual(FailureCrash(process_name='foo', pid=1234).message(), 'foo crashed [pid=1234]')