#!/usr/bin/python
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import os
import sys
import unittest

from test_expectations import TestExpectationsChecker
from webkitpy.layout_tests import port


class ErrorCollector(object):
    """An error handler class for unit tests."""

    def __init__(self):
        self._errors = []
        self.turned_off_filtering = False

    def turn_off_line_filtering(self):
        self.turned_off_filtering = True

    def __call__(self, lineno, category, confidence, message):
        self._errors.append('%s  [%s] [%d]' % (message, category, confidence))

    def get_errors(self):
        return ''.join(self._errors)

    def reset_errors(self):
        self._errors = []
        self.turned_off_filtering = False


class TestExpectationsTestCase(unittest.TestCase):
    """TestCase for test_expectations.py"""

    def setUp(self):
        self._error_collector = ErrorCollector()
        port_obj = port.get('test')
        self._test_file = 'passes/text.html'

    def process_expectations(self, expectations, overrides=None):
        self._checker = TestExpectationsChecker()

    def assert_lines_lint(self, lines, expected):
        self._error_collector.reset_errors()
        checker = TestExpectationsChecker('test/test_expectations.txt',
                                          self._error_collector)
        checker.check_test_expectations(expectations_str='\n'.join(lines),
                                        tests=[self._test_file],
                                        overrides=None)
        checker.check_tabs(lines)
        self.assertEqual(expected, self._error_collector.get_errors())
        self.assertTrue(self._error_collector.turned_off_filtering)

    def test_valid_expectations(self):
        self.assert_lines_lint(
            ["BUGCR1234 MAC : passes/text.html = PASS FAIL"],
            "")
        self.assert_lines_lint(
            ["SKIP BUGCR1234 : passes/text.html = TIMEOUT PASS"],
            "")
        self.assert_lines_lint(
            ["BUGCR1234 DEBUG : passes/text.html = TIMEOUT PASS"],
            "")
        self.assert_lines_lint(
            ["BUGCR1234 DEBUG SKIP : passes/text.html = TIMEOUT PASS"],
            "")
        self.assert_lines_lint(
            ["BUGCR1234 MAC DEBUG SKIP : passes/text.html = TIMEOUT PASS"],
            "")
        self.assert_lines_lint(
            ["BUGCR1234 DEBUG MAC : passes/text.html = TIMEOUT PASS"],
            "")
        self.assert_lines_lint(
            ["SLOW BUGCR1234 : passes/text.html = PASS"],
            "")
        self.assert_lines_lint(
            ["WONTFIX SKIP : passes/text.html = TIMEOUT"],
            "")

    def test_modifier_errors(self):
        self.assert_lines_lint(
            ["BUG1234 : passes/text.html = FAIL"],
            "BUG\\d+ is not allowed, must be one of BUGCR\\d+, BUGWK\\d+, BUGV8_\\d+, or a non-numeric bug identifier. passes/text.html  [test/expectations] [5]")

    def test_valid_modifiers(self):
        self.assert_lines_lint(
            ["INVALID-MODIFIER : passes/text.html = PASS"],
            "Unrecognized modifier 'invalid-modifier' "
            "passes/text.html  [test/expectations] [5]")
        self.assert_lines_lint(
            ["SKIP : passes/text.html = PASS"],
            "Test lacks BUG modifier. "
            "passes/text.html  [test/expectations] [2]")

    def test_expectation_errors(self):
        self.assert_lines_lint(
            ["missing expectations"],
            "Missing a ':' missing expectations  [test/expectations] [5]")
        self.assert_lines_lint(
            ["SLOW : passes/text.html = TIMEOUT"],
            "A test can not be both SLOW and TIMEOUT. "
            "If it times out indefinitely, then it should be just TIMEOUT. "
            "passes/text.html  [test/expectations] [5]")
        self.assert_lines_lint(
            ["BUGWK1 : does/not/exist.html = FAIL"],
            "Path does not exist. does/not/exist.html  [test/expectations] [2]")

    def test_parse_expectations(self):
        self.assert_lines_lint(
            ["BUGWK1 : passes/text.html = PASS"],
            "")
        self.assert_lines_lint(
            ["BUGWK1 : passes/text.html = UNSUPPORTED"],
            "Unsupported expectation: unsupported "
            "passes/text.html  [test/expectations] [5]")
        self.assert_lines_lint(
            ["BUGWK1 : passes/text.html = PASS UNSUPPORTED"],
            "Unsupported expectation: unsupported "
            "passes/text.html  [test/expectations] [5]")

    def test_already_seen_test(self):
        self.assert_lines_lint(
            ["BUGWK1 : passes/text.html = PASS",
             "BUGWK1 : passes/text.html = TIMEOUT"],
            "Duplicate or ambiguous expectation. %s  [test/expectations] [5]" % self._test_file)

    def test_tab(self):
        self.assert_lines_lint(
            ["\tBUGWK1 : passes/text.html = PASS"],
            "Line contains tab character.  [whitespace/tab] [5]")
