tools/json_to_struct/element_generator_test.py

#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

from element_generator import GenerateFieldContent
from element_generator import GenerateElements
import unittest

class ElementGeneratorTest(unittest.TestCase):
  def testGenerateIntFieldContent(self):
    lines = [];
    GenerateFieldContent('', {'type': 'int', 'default': 5}, None, lines)
    self.assertEquals(['  5,'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'int', 'default': 5}, 12, lines)
    self.assertEquals(['  12,'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'int'}, -3, lines)
    self.assertEquals(['  -3,'], lines)

  def testGenerateStringFieldContent(self):
    lines = [];
    GenerateFieldContent('', {'type': 'string', 'default': 'foo_bar'}, None,
                         lines)
    self.assertEquals(['  "foo_bar",'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'string', 'default': 'foo'}, 'bar\n',
                         lines)
    self.assertEquals(['  "bar\\n",'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'string'}, None, lines)
    self.assertEquals(['  NULL,'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'string'}, 'foo', lines)
    self.assertEquals(['  "foo",'], lines)

  def testGenerateString16FieldContent(self):
    lines = [];
    GenerateFieldContent('', {'type': 'string16',
                              'default': u'f\u00d8\u00d81a'}, None, lines)
    self.assertEquals(['  L"f\\x00d8" L"\\x00d8" L"1a",'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'string16', 'default': 'foo'},
                         u'b\uc3a5r', lines)
    self.assertEquals(['  L"b\\xc3a5" L"r",'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'string16'}, None, lines)
    self.assertEquals(['  NULL,'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'string16'}, u'foo\\u1234', lines)
    self.assertEquals(['  L"foo\\\\u1234",'], lines)

  def testGenerateEnumFieldContent(self):
    lines = [];
    GenerateFieldContent('', {'type': 'enum', 'default': 'RED'}, None, lines)
    self.assertEquals(['  RED,'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'enum', 'default': 'RED'}, 'BLACK', lines)
    self.assertEquals(['  BLACK,'], lines)
    lines = [];
    GenerateFieldContent('', {'type': 'enum'}, 'BLUE', lines)
    self.assertEquals(['  BLUE,'], lines)

  def testGenerateArrayFieldContent(self):
    lines = ['STRUCT BEGINS'];
    GenerateFieldContent('test', {'type': 'array', 'contents': {'type': 'int'}},
                         None, lines)
    self.assertEquals(['STRUCT BEGINS', '  NULL,', '  0,'], lines)
    lines = ['STRUCT BEGINS'];
    GenerateFieldContent('test', {'field': 'my_array', 'type': 'array',
                                  'contents': {'type': 'int'}}, [3, 4], lines)
    self.assertEquals('const int array_test_my_array[] = {\n' +
      '  3,\n' +
      '  4,\n' +
      '};\n' +
      'STRUCT BEGINS\n' +
      '  array_test_my_array,\n' +
      '  2,', '\n'.join(lines))

  def testGenerateElements(self):
    schema = [
      {'field': 'f0', 'type': 'int', 'default': 1000, 'optional': True},
      {'field': 'f1', 'type': 'string'},
      {'field': 'f2', 'type': 'enum', 'ctype': 'QuasiBool', 'default': 'MAYBE',
       'optional': True},
      {'field': 'f3', 'type': 'array', 'contents': {'type': 'string16'},
       'optional': True}
    ]
    description = {
      'int_variables': {'a': -5, 'b': 5},
      'elements': {
        'elem0': {'f0': 5, 'f1': 'foo', 'f2': 'SURE'},
        'elem1': {'f2': 'NOWAY', 'f0': -2, 'f1': 'bar'},
        'elem2': {'f1': 'foo_bar', 'f3': [u'bar', u'foo']}
      }
    }

    # Build the expected result stream based on the unpredicatble order the
    # dictionary element are listed in.
    int_variable_expected = {
      'a': 'const int a = -5;\n',
      'b': 'const int b = 5;\n',
    }
    elements_expected = {
      'elem0': 'const MyType elem0 = {\n' +
               '  5,\n' +
               '  "foo",\n' +
               '  SURE,\n' +
               '  NULL,\n' +
               '  0,\n'
               '};\n',
      'elem1': 'const MyType elem1 = {\n' +
               '  -2,\n' +
               '  "bar",\n' +
               '  NOWAY,\n' +
               '  NULL,\n' +
               '  0,\n'
               '};\n',
      'elem2': 'const wchar_t* const array_elem2_f3[] = {\n' +
               '  L"bar",\n' +
               '  L"foo",\n' +
               '};\n' +
               'const MyType elem2 = {\n' +
               '  1000,\n' +
               '  "foo_bar",\n' +
               '  MAYBE,\n' +
               '  array_elem2_f3,\n' +
               '  2,\n'
               '};\n'
    }
    expected = ''
    for key, value in description['int_variables'].items():
      expected += int_variable_expected[key]
    expected += '\n'
    elements = []
    for key, value in description['elements'].items():
      elements.append(elements_expected[key])
    expected += '\n'.join(elements)

    result = GenerateElements('MyType', schema, description)
    self.assertEquals(expected, result)

  def testGenerateElementsMissingMandatoryField(self):
    schema = [
      {'field': 'f0', 'type': 'int'},
      {'field': 'f1', 'type': 'string'},
    ]
    description = {
      'int_variables': {'a': -5, 'b': 5},
      'elements': {
        'elem0': {'f0': 5},
      }
    }

    self.assertRaises(RuntimeError,
      lambda: GenerateElements('MyType', schema, description))

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