#!/usr/bin/python3

import unittest
from unittest import mock

import tempfile, shutil # Handling test_tmpdir

import os

import kunit_config
import kunit_parser
import kunit_kernel
import kunit

test_tmpdir = ''

def setUpModule():
	global test_tmpdir
	test_tmpdir = tempfile.mkdtemp()

def tearDownModule():
	shutil.rmtree(test_tmpdir)

def get_absolute_path(path):
	return os.path.join(os.path.dirname(__file__), path)

class KconfigTest(unittest.TestCase):

	def test_is_subset_of(self):
		kconfig0 = kunit_config.Kconfig()
		self.assertTrue(kconfig0.is_subset_of(kconfig0))

		kconfig1 = kunit_config.Kconfig()
		kconfig1.add_entry(kunit_config.KconfigEntry('TEST','y'))
		self.assertTrue(kconfig1.is_subset_of(kconfig1))
		self.assertTrue(kconfig0.is_subset_of(kconfig1))
		self.assertFalse(kconfig1.is_subset_of(kconfig0))

	def test_read_from_file(self):
		kconfig = kunit_config.Kconfig()
		kconfig_path = get_absolute_path(
			'test_data/test_read_from_file.kconfig')

		kconfig.read_from_file(kconfig_path)

		expected_kconfig = kunit_config.Kconfig()
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('UML','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('MMU','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('TEST','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('EXAMPLE_TEST','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('MK8','n'))

		self.assertEqual(kconfig.entries(), expected_kconfig.entries())

	def test_write_to_file(self):
		kconfig_path = os.path.join(test_tmpdir, '.config')

		expected_kconfig = kunit_config.Kconfig()
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('UML','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('MMU','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('TEST','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('EXAMPLE_TEST','y'))
		expected_kconfig.add_entry(
			kunit_config.KconfigEntry('MK8','n'))

		expected_kconfig.write_to_file(kconfig_path)

		actual_kconfig = kunit_config.Kconfig()
		actual_kconfig.read_from_file(kconfig_path)

		self.assertEqual(actual_kconfig.entries(),
				 expected_kconfig.entries())

class KUnitParserTest(unittest.TestCase):

	def assertContains(self, needle, haystack):
		for line in haystack:
			if needle in line:
				return
		raise AssertionError('"' +
			str(needle) + '" not found in "' + str(haystack) + '"!')

	def test_output_isolated_correctly(self):
		log_path = get_absolute_path(
			'test_data/test_output_isolated_correctly.log')
		file = open(log_path)
		result = kunit_parser.isolate_kunit_output(file.readlines())
		self.assertContains('kunit example: initializing\n', result)
		self.assertContains('kunit example: example_mock_test passed\n',
				    result)
		self.assertContains('kunit example: all tests passed\n', result)
		file.close()

	def test_parse_successful_test_log(self):
		all_passed_log = get_absolute_path(
			'test_data/test_is_test_passed-all_passed.log')
		file = open(all_passed_log)
		result = kunit_parser.parse_run_tests(file.readlines())
		self.assertEqual(
			kunit_parser.TestStatus.SUCCESS,
			result.status)
		file.close()

	def test_parse_failed_test_log(self):
		failed_log = get_absolute_path(
			'test_data/test_is_test_passed-failure.log')
		file = open(failed_log)
		result = kunit_parser.parse_run_tests(file.readlines())
		self.assertEqual(
			kunit_parser.TestStatus.FAILURE,
			result.status)
		file.close()

	def test_broken_test(self):
		broken_log = get_absolute_path(
			'test_data/test_is_test_passed-broken_test.log')
		file = open(broken_log)
		result = kunit_parser.parse_run_tests(
			kunit_parser.isolate_kunit_output(file.readlines()))
		self.assertEqual(
			kunit_parser.TestStatus.KERNEL_CRASHED,
			result.status)
		file.close()

	def test_no_tests(self):
		empty_log = get_absolute_path(
			'test_data/test_is_test_passed-no_tests_run.log')
		file = open(empty_log)
		result = kunit_parser.parse_run_tests(
			kunit_parser.isolate_kunit_output(file.readlines()))
		self.assertEqual(0, len(result.modules))
		self.assertEqual(
			kunit_parser.TestStatus.SUCCESS,
			result.status)
		file.close()

	def test_crashed_test(self):
		crashed_log = get_absolute_path(
			'test_data/test_is_test_passed-crash.log')
		file = open(crashed_log)
		result = kunit_parser.parse_run_tests(file.readlines())
		self.assertEqual(
			kunit_parser.TestStatus.TEST_CRASHED,
			result.status)
		file.close()

	def test_timed_out_test(self):
		timed_out_log = get_absolute_path(
			'test_data/test_is_test_passed-timed_out.log')
		file = open(timed_out_log)
		result = kunit_parser.parse_run_tests(file.readlines())
		self.assertEqual(
			kunit_parser.TestStatus.TIMED_OUT,
			result.status)
		file.close()

class StrContains(str):
	def __eq__(self, other):
		return self in other

class KUnitMainTest(unittest.TestCase):
	def setUp(self):
		self.print_patch = mock.patch('builtins.print')
		self.print_mock = self.print_patch.start()
		self.linux_source_mock = mock.Mock()
		self.linux_source_mock.build_reconfig = mock.Mock(
			return_value=kunit_kernel.ConfigResult(
							kunit_kernel.ConfigStatus.SUCCESS, ''))
		self.linux_source_mock.build_um_kernel = mock.Mock(
			return_value=kunit_kernel.BuildResult(
							kunit_kernel.BuildStatus.SUCCESS, ''))
		self.linux_source_mock.run_kernel = mock.Mock(return_value=[
				'console 0 enabled',
				'reboot: System halted'])

	def tearDown(self):
		self.print_patch.stop()

	def test_run_passes_args_pass(self):
		kunit.main(['run'], self.linux_source_mock)
		assert self.linux_source_mock.build_reconfig.call_count == 1
		assert self.linux_source_mock.run_kernel.call_count == 1
		self.print_mock.assert_any_call(StrContains('Testing complete.'))

	def test_run_passes_args_fail(self):
		self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
		with self.assertRaises(SystemExit) as e:
			kunit.main(['run'], self.linux_source_mock)
		assert type(e.exception) == SystemExit
		assert e.exception.code == 1
		assert self.linux_source_mock.build_reconfig.call_count == 1
		assert self.linux_source_mock.run_kernel.call_count == 1
		self.print_mock.assert_any_call(StrContains('Before the crash:'))

	def test_run_raw_output(self):
		self.linux_source_mock.run_kernel = mock.Mock(return_value=[])
		kunit.main(['run', '--raw_output'], self.linux_source_mock)
		assert self.linux_source_mock.build_reconfig.call_count == 1
		assert self.linux_source_mock.run_kernel.call_count == 1
		for kall in self.print_mock.call_args_list:
			assert kall != mock.call(StrContains('Testing complete.'))
			assert kall != mock.call(StrContains('Before the crash:'))

	def test_run_timeout(self):
		timeout = 3453
		kunit.main(['run', '--timeout', str(timeout)], self.linux_source_mock)
		assert self.linux_source_mock.build_reconfig.call_count == 1
		self.linux_source_mock.run_kernel.assert_called_once_with(timeout=timeout)
		self.print_mock.assert_any_call(StrContains('Testing complete.'))

	def test_new_no_namespace(self):
		kunit.main(['new', '--path', 'drivers/i2c/busses/i2c-aspeed.c'], self.linux_source_mock)
		assert self.linux_source_mock.build_reconfig.call_count == 0
		assert self.linux_source_mock.run_kernel.call_count == 0
		self.print_mock.assert_any_call(StrContains('i2c_aspeed'))
		for kall in self.print_mock.call_args_list:
			assert kall != mock.call(StrContains('aspeed_i2c'))

	def test_new_with_namespace(self):
		namespace_prefix = 'aspeed_i2c'
		kunit.main([
				'new',
				'--path', 'drivers/i2c/busses/i2c-aspeed.c',
				'--namespace_prefix', namespace_prefix],
			   self.linux_source_mock)
		assert self.linux_source_mock.build_reconfig.call_count == 0
		assert self.linux_source_mock.run_kernel.call_count == 0
		self.print_mock.assert_any_call(StrContains('i2c-aspeed'))
		self.print_mock.assert_any_call(StrContains('aspeed_i2c'))


class TestConfigProvider():
	def __init__(self, kconfig):
		self._kconfig = kconfig

	def get_kconfig(self):
		return self._kconfig


class TestLinuxSourceTreeOperationsNoChange(object):
	def __init__(self, configP):
		self.configPath = configP

	def make_olddefconfig(self):
		"""Does not change the file at all and doesn't raise error."""


class TestLinuxSourceTreeOperationsDeleteLine(object):
	def __init__(self, configP):
		self.configPath = configP

	def make_olddefconfig(self):
		"""Deletes line in config file and raises ConfigError."""

		configFile = open(self.configPath, "r")
		lines = configFile.readlines()
		lines = lines[:-1]
		configFile = open(self.configPath, "w")

		for l in lines:
			configFile.write(l)

		raise kunit_kernel.ConfigError('make olddefconfig deleted lines in .config file')


class TestLinuxSourceTreeOperationsAddLine(object):
	def __init__(self, configP):
		self.configPath = configP

	def make_olddefconfig(self):
		"""Adds extra line to config file and doesn't raise error."""

		configFile = open(self.configPath, "a")
		configFile.write("CONFIG_EXAMPLE_TEST=y\n")


class KUnitKernelTest(unittest.TestCase):
	def test_not_subset_throw_exception(self):
		supersetConfig = kunit_config.Kconfig()
		subsetConfig = kunit_config.Kconfig()
		subsetConfig.add_entry(kunit_config.KconfigEntry('TEST','y'))

		with self.assertRaises(kunit_kernel.ConfigError):
			kunit_kernel.throw_error_if_not_subset(supersetConfig, subsetConfig)

	def test_not_subset_no_exception(self):
		subsetConfig = kunit_config.Kconfig()
		supersetConfig = kunit_config.Kconfig()
		supersetConfig.add_entry(kunit_config.KconfigEntry('TEST','y'))
		kunit_kernel.throw_error_if_not_subset(supersetConfig, subsetConfig)

	def test_build_reconfig_no_change(self):
		tempConfig = tempfile.NamedTemporaryFile(delete=False, mode="w+")

		kconfig = kunit_config.Kconfig()
		kconfig.add_entry(kunit_config.KconfigEntry('TEST','y'))
		kconfig.add_entry(kunit_config.KconfigEntry('MMU','y'))
		kconfig.add_entry(kunit_config.KconfigEntry('UML','y'))

		operations = TestLinuxSourceTreeOperationsNoChange(tempConfig.name)

		with mock.patch.object(kunit_kernel, 'KCONFIG_PATH', tempConfig.name):
			tree = kunit_kernel.LinuxSourceTree(kconfig_provider = TestConfigProvider(kconfig),
				linux_build_operations = operations)

			tempConfig.write(str('CONFIG_TEST=n\nCONFIG_MMU=y\n'))
			tempConfig.seek(0)

			returnValue = tree.build_reconfig()
			self.assertEquals(returnValue.status, kunit_kernel.ConfigStatus.SUCCESS,
				returnValue.info)

	def test_build_reconfig_delete_config_line(self):
		tempConfig = tempfile.NamedTemporaryFile(delete=False, mode="w+")

		kconfig = kunit_config.Kconfig()
		kconfig.add_entry(kunit_config.KconfigEntry('TEST','y'))
		kconfig.add_entry(kunit_config.KconfigEntry('MMU','y'))
		kconfig.add_entry(kunit_config.KconfigEntry('UML','y'))

		operations = TestLinuxSourceTreeOperationsDeleteLine(tempConfig.name)

		with mock.patch.object(kunit_kernel, 'KCONFIG_PATH', tempConfig.name):
			tree = kunit_kernel.LinuxSourceTree(kconfig_provider = TestConfigProvider(kconfig),
				linux_build_operations = operations)

			tempConfig.write(str('CONFIG_TEST=n\nCONFIG_MMU=y\n'))
			tempConfig.seek(0)

			returnValue = tree.build_reconfig()
			self.assertEquals(returnValue.status, kunit_kernel.ConfigStatus.FAILURE)

	def test_build_reconfig_add_config_line(self):
		tempConfig = tempfile.NamedTemporaryFile(delete=False, mode="w+")

		kconfig = kunit_config.Kconfig()

		operations = TestLinuxSourceTreeOperationsAddLine(tempConfig.name)

		with mock.patch.object(kunit_kernel, 'KCONFIG_PATH', tempConfig.name):
			tree = kunit_kernel.LinuxSourceTree(kconfig_provider = TestConfigProvider(kconfig),
				linux_build_operations = operations)

			tempConfig.write(str('CONFIG_TEST=n\nCONFIG_MMU=y\n'))
			tempConfig.seek(0)

			returnValue = tree.build_reconfig()
			self.assertEquals(returnValue.status, kunit_kernel.ConfigStatus.SUCCESS,
				returnValue.info)

	def test_build_reconfig_file_unavailable(self):
		tempConfig = tempfile.NamedTemporaryFile(delete=False, mode="w+")

		kconfig = kunit_config.Kconfig()

		operations = TestLinuxSourceTreeOperationsAddLine(tempConfig.name)

		with mock.patch.object(kunit_kernel, 'KCONFIG_PATH', tempConfig.name):
			os.remove(tempConfig.name)
			tree = kunit_kernel.LinuxSourceTree(kconfig_provider = TestConfigProvider(kconfig),
				linux_build_operations = operations)

			tempConfig.write(str('CONFIG_TEST=n\nCONFIG_MMU=y\n'))
			tempConfig.seek(0)

			returnValue = tree.build_reconfig()
			self.assertEquals(returnValue.status, kunit_kernel.ConfigStatus.SUCCESS,
				returnValue.info)


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