#!/usr/bin/env python
#
# Copyright 2013 The Closure Library Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS-IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Unit test for depstree."""

__author__ = 'nnaze@google.com (Nathan Naze)'

import os
import unittest

import jscompiler


class JsCompilerTestCase(unittest.TestCase):
  """Unit tests for jscompiler module."""

  def testGetFlagFile(self):
    flags_file = jscompiler._GetFlagFile(
        ['path/to/src1.js', 'path/to/src2.js'], ['--test_compiler_flag'])

    def file_get_contents(filename):
      with open(filename) as f:
        content = f.read()
        f.close()
        return content

    flags_file_content = file_get_contents(flags_file.name)
    os.remove(flags_file.name)

    self.assertEqual(
        '--js path/to/src1.js --js path/to/src2.js --test_compiler_flag',
        flags_file_content)

  def testGetJsCompilerArgs(self):

    original_check = jscompiler._JavaSupports32BitMode
    jscompiler._JavaSupports32BitMode = lambda: False
    args = jscompiler._GetJsCompilerArgs('path/to/jscompiler.jar', (1, 7),
                                         ['--test_jvm_flag'])

    self.assertEqual(
        ['java', '-client', '--test_jvm_flag', '-jar',
         'path/to/jscompiler.jar'], args)

    def CheckJava15RaisesError():
      jscompiler._GetJsCompilerArgs('path/to/jscompiler.jar', (1, 5),
                                    ['--test_jvm_flag'])

    self.assertRaises(jscompiler.JsCompilerError, CheckJava15RaisesError)
    jscompiler._JavaSupports32BitMode = original_check

  def testGetJsCompilerArgs32BitJava(self):

    original_check = jscompiler._JavaSupports32BitMode

    # Should include the -d32 flag only if 32-bit Java is supported by the
    # system.
    jscompiler._JavaSupports32BitMode = lambda: True
    args = jscompiler._GetJsCompilerArgs('path/to/jscompiler.jar', (1, 7),
                                         ['--test_jvm_flag'])

    self.assertEqual(
        ['java', '-d32', '-client', '--test_jvm_flag', '-jar',
         'path/to/jscompiler.jar'], args)

    # Should exclude the -d32 flag if 32-bit Java is not supported by the
    # system.
    jscompiler._JavaSupports32BitMode = lambda: False
    args = jscompiler._GetJsCompilerArgs('path/to/jscompiler.jar', (1, 7),
                                         ['--test_jvm_flag'])

    self.assertEqual(
        ['java', '-client', '--test_jvm_flag', '-jar',
         'path/to/jscompiler.jar'], args)

    jscompiler._JavaSupports32BitMode = original_check

  def testGetJavaVersion(self):

    def assertVersion(expected, version_string):
      self.assertEquals(expected, jscompiler._ParseJavaVersion(version_string))

    assertVersion((1, 7), _TEST_JAVA_VERSION_STRING)
    assertVersion((1, 6), _TEST_JAVA_NESTED_VERSION_STRING)
    assertVersion((1, 4), 'java version "1.4.0_03-ea"')


_TEST_JAVA_VERSION_STRING = """\
openjdk version "1.7.0-google-v5"
OpenJDK Runtime Environment (build 1.7.0-google-v5-64327-39803485)
OpenJDK Server VM (build 22.0-b10, mixed mode)
"""

_TEST_JAVA_NESTED_VERSION_STRING = """\
Picked up JAVA_TOOL_OPTIONS: -Dfile.encoding=UTF-8
java version "1.6.0_35"
Java(TM) SE Runtime Environment (build 1.6.0_35-b10-428-11M3811)
Java HotSpot(TM) Client VM (build 20.10-b01-428, mixed mode)
"""

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