# Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

# 1.  Redistributions of source code must retain the above copyright

#     notice, this list of conditions and the following disclaimer.

# 2.  Redistributions in binary form must reproduce the above copyright

#     notice, this list of conditions and the following disclaimer in the

#     documentation and/or other materials provided with the distribution.

#

# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY

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# DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY

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"""Unit tests for parser.py."""

import unittest

from webkitpy.common.system.logtesting import LoggingTestCase

from webkitpy.style.optparser import ArgumentParser

from webkitpy.style.optparser import ArgumentPrinter

from webkitpy.style.optparser import CommandOptionValues as ProcessorOptions

from webkitpy.style.optparser import DefaultCommandOptionValues

class ArgumentPrinterTest(unittest.TestCase):

    """Tests the ArgumentPrinter class."""

    _printer = ArgumentPrinter()

    def _create_options(self,

                        output_format='emacs',

                        min_confidence=3,

                        filter_rules=[],

                        git_commit=None):

        return ProcessorOptions(filter_rules=filter_rules,

                                git_commit=git_commit,

                                min_confidence=min_confidence,

                                output_format=output_format)

    def test_to_flag_string(self):

        options = self._create_options('vs7', 5, ['+foo', '-bar'], 'git')

        self.assertEquals('--filter=+foo,-bar --git-commit=git '

                          '--min-confidence=5 --output=vs7',

                          self._printer.to_flag_string(options))

        # This is to check that --filter and --git-commit do not

        # show up when not user-specified.

        options = self._create_options()

        self.assertEquals('--min-confidence=3 --output=emacs',

                          self._printer.to_flag_string(options))

class ArgumentParserTest(LoggingTestCase):

    """Test the ArgumentParser class."""

    class _MockStdErr(object):

        def write(self, message):

            # We do not want the usage string or style categories

            # to print during unit tests, so print nothing.

            return

    def _parse(self, args):

        """Call a test parser.parse()."""

        parser = self._create_parser()

        return parser.parse(args)

    def _create_defaults(self):

        """Return a DefaultCommandOptionValues instance for testing."""

        base_filter_rules = ["-", "+whitespace"]

        return DefaultCommandOptionValues(min_confidence=3,

                                          output_format="vs7")

    def _create_parser(self):

        """Return an ArgumentParser instance for testing."""

        default_options = self._create_defaults()

        all_categories = ["build" ,"whitespace"]

        mock_stderr = self._MockStdErr()

        return ArgumentParser(all_categories=all_categories,

                              base_filter_rules=[],

                              default_options=default_options,

                              mock_stderr=mock_stderr,

                              usage="test usage")

    def test_parse_documentation(self):

        parse = self._parse

        # FIXME: Test both the printing of the usage string and the

        #        filter categories help.

        # Request the usage string.

        self.assertRaises(SystemExit, parse, ['--help'])

        # Request default filter rules and available style categories.

        self.assertRaises(SystemExit, parse, ['--filter='])

    def test_parse_bad_values(self):

        parse = self._parse

        # Pass an unsupported argument.

        self.assertRaises(SystemExit, parse, ['--bad'])

        self.assertLog(['ERROR: no such option: --bad\n'])

        self.assertRaises(SystemExit, parse, ['--min-confidence=bad'])

        self.assertLog(['ERROR: option --min-confidence: '

                        "invalid integer value: 'bad'\n"])

        self.assertRaises(SystemExit, parse, ['--min-confidence=0'])

        self.assertLog(['ERROR: option --min-confidence: invalid integer: 0: '

                        'value must be between 1 and 5\n'])

        self.assertRaises(SystemExit, parse, ['--min-confidence=6'])

        self.assertLog(['ERROR: option --min-confidence: invalid integer: 6: '

                        'value must be between 1 and 5\n'])

        parse(['--min-confidence=1']) # works

        parse(['--min-confidence=5']) # works

        self.assertRaises(SystemExit, parse, ['--output=bad'])

        self.assertLog(['ERROR: option --output-format: invalid choice: '

                        "'bad' (choose from 'emacs', 'vs7')\n"])

        parse(['--output=vs7']) # works

        # Pass a filter rule not beginning with + or -.

        self.assertRaises(SystemExit, parse, ['--filter=build'])

        self.assertLog(['ERROR: Invalid filter rule "build": '

                        'every rule must start with + or -.\n'])

        parse(['--filter=+build']) # works

        # Pass files and git-commit at the same time.

        self.assertRaises(SystemExit, parse, ['--git-commit=committish',

                                              'file.txt'])

        self.assertLog(['ERROR: You cannot provide both paths and '

                        'a git commit at the same time.\n'])

    def test_parse_default_arguments(self):

        parse = self._parse

        (files, options) = parse([])

        self.assertEquals(files, [])

        self.assertEquals(options.filter_rules, [])

        self.assertEquals(options.git_commit, None)

        self.assertEquals(options.is_verbose, False)

        self.assertEquals(options.min_confidence, 3)

        self.assertEquals(options.output_format, 'vs7')

    def test_parse_explicit_arguments(self):

        parse = self._parse

        # Pass non-default explicit values.

        (files, options) = parse(['--min-confidence=4'])

        self.assertEquals(options.min_confidence, 4)

        (files, options) = parse(['--output=emacs'])

        self.assertEquals(options.output_format, 'emacs')

        (files, options) = parse(['-g', 'commit'])

        self.assertEquals(options.git_commit, 'commit')

        (files, options) = parse(['--git-commit=commit'])

        self.assertEquals(options.git_commit, 'commit')

        (files, options) = parse(['--git-diff=commit'])

        self.assertEquals(options.git_commit, 'commit')

        (files, options) = parse(['--verbose'])

        self.assertEquals(options.is_verbose, True)

        # Pass user_rules.

        (files, options) = parse(['--filter=+build,-whitespace'])

        self.assertEquals(options.filter_rules,

                          ["+build", "-whitespace"])

        # Pass spurious white space in user rules.

        (files, options) = parse(['--filter=+build, -whitespace'])

        self.assertEquals(options.filter_rules,

                          ["+build", "-whitespace"])

    def test_parse_files(self):

        parse = self._parse

        (files, options) = parse(['foo.cpp'])

        self.assertEquals(files, ['foo.cpp'])

        # Pass multiple files.

        (files, options) = parse(['--output=emacs', 'foo.cpp', 'bar.cpp'])

        self.assertEquals(files, ['foo.cpp', 'bar.cpp'])

class CommandOptionValuesTest(unittest.TestCase):

    """Tests CommandOptionValues class."""

    def test_init(self):

        """Test __init__ constructor."""

        # Check default parameters.

        options = ProcessorOptions()

        self.assertEquals(options.filter_rules, [])

        self.assertEquals(options.git_commit, None)

        self.assertEquals(options.is_verbose, False)

        self.assertEquals(options.min_confidence, 1)

        self.assertEquals(options.output_format, "emacs")

        # Check argument validation.

        self.assertRaises(ValueError, ProcessorOptions, output_format="bad")

        ProcessorOptions(output_format="emacs") # No ValueError: works

        ProcessorOptions(output_format="vs7") # works

        self.assertRaises(ValueError, ProcessorOptions, min_confidence=0)

        self.assertRaises(ValueError, ProcessorOptions, min_confidence=6)

        ProcessorOptions(min_confidence=1) # works

        ProcessorOptions(min_confidence=5) # works

        # Check attributes.

        options = ProcessorOptions(filter_rules=["+"],

                                   git_commit="commit",

                                   is_verbose=True,

                                   min_confidence=3,

                                   output_format="vs7")

        self.assertEquals(options.filter_rules, ["+"])

        self.assertEquals(options.git_commit, "commit")

        self.assertEquals(options.is_verbose, True)

        self.assertEquals(options.min_confidence, 3)

        self.assertEquals(options.output_format, "vs7")

    def test_eq(self):

        """Test __eq__ equality function."""

        self.assertTrue(ProcessorOptions().__eq__(ProcessorOptions()))

        # Also verify that a difference in any argument causes equality to fail.

        # Explicitly create a ProcessorOptions instance with all default

        # values.  We do this to be sure we are assuming the right default

        # values in our self.assertFalse() calls below.

        options = ProcessorOptions(filter_rules=[],

                                   git_commit=None,

                                   is_verbose=False,

                                   min_confidence=1,

                                   output_format="emacs")

        # Verify that we created options correctly.

        self.assertTrue(options.__eq__(ProcessorOptions()))

        self.assertFalse(options.__eq__(ProcessorOptions(filter_rules=["+"])))

        self.assertFalse(options.__eq__(ProcessorOptions(git_commit="commit")))

        self.assertFalse(options.__eq__(ProcessorOptions(is_verbose=True)))

        self.assertFalse(options.__eq__(ProcessorOptions(min_confidence=2)))

        self.assertFalse(options.__eq__(ProcessorOptions(output_format="vs7")))

    def test_ne(self):

        """Test __ne__ inequality function."""

        # By default, __ne__ always returns true on different objects.

        # Thus, just check the distinguishing case to verify that the

        # code defines __ne__.

        self.assertFalse(ProcessorOptions().__ne__(ProcessorOptions()))