#!/usr/bin/python
# Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
# for details. All rights reserved. Use of this source code is governed by a
# BSD-style license that can be found in the LICENSE file.

import logging.config
import unittest
import templateloader


class TemplateLoaderTestCase(unittest.TestCase):

    def _preprocess(self, input_text, conds):
        loader = templateloader.TemplateLoader('.', [], conds)
        return loader._Preprocess(input_text, '<file>', conds)

    def _preprocess_test(self, input_text, conds, expected_text):
        output_text = self._preprocess(input_text, conds)
        if output_text != expected_text:
            msg = '''
EXPECTED:
%s
---
ACTUAL  :
%s
---''' % (expected_text, output_text)
            self.fail(msg)

    def _preprocess_error_test(self, input_text, conds, expected_message):
        threw = False
        try:
            output_text = self._preprocess(input_text, conds)
        except Exception, e:
            threw = True
            if str(e).find(expected_message) == -1:
                self.fail("'%s' does not contain '%s'" % (e, expected_message))
        if not threw:
            self.fail("missing error, expected '%s'" % expected_message)

    def test_freevar(self):
        input_text = '''$A
$B'''
        self._preprocess_test(input_text, {}, input_text)

    def test_comments(self):
        input_text = '''//$ comment 1
Hello
//$ comment 2'''
        self._preprocess_test(input_text, {}, 'Hello\n')

    def test_ite1(self):
        input_text = '''
        aaa
        $if A
        bbb
        $else
        ccc
        $endif
        ddd
        '''
        self._preprocess_test(
            input_text, {'A': True}, '''
        aaa
        bbb
        ddd
        ''')

    def test_ite2(self):
        input_text = '''
        aaa
        $if A
        bbb
        $else
        ccc
        $endif
        ddd
        '''
        self._preprocess_test(
            input_text, {'A': False}, '''
        aaa
        ccc
        ddd
        ''')

    def test_if1(self):
        input_text = '''
       $if
       '''
        self._preprocess_error_test(input_text, {},
                                    '$if does not have single variable')

    def test_if2(self):
        input_text = '''
       $if A
       '''
        self._preprocess_error_test(input_text, {}, 'Unknown $if variable')

    def test_else1(self):
        input_text = '''
       $else
       '''
        self._preprocess_error_test(input_text, {}, '$else without $if')

    def test_else2(self):
        input_text = '''
       $if A
       $else
       $else
       '''
        self._preprocess_error_test(input_text, {'A': True}, 'Double $else')

    def test_eof1(self):
        input_text = '''
       $if A
       '''
        self._preprocess_error_test(input_text, {'A': True}, 'Unterminated')

    def test_eof2(self):
        input_text = '''
       $if A
       $else
       '''
        self._preprocess_error_test(input_text, {'A': True}, 'Unterminated')


if __name__ == "__main__":
    logging.config.fileConfig("logging.conf")
    if __name__ == '__main__':
        unittest.main()