C++->Java string constants auto-generator

build/android/gyp/java_cpp_string_tests.py

Index: build/android/gyp/java_cpp_string_tests.py
diff --git a/build/android/gyp/java_cpp_string_tests.py b/build/android/gyp/java_cpp_string_tests.py
new file mode 100755
index 0000000000000000000000000000000000000000..458d1d641730d57bb16fb076903389e07cd3c78f
--- /dev/null
+++ b/build/android/gyp/java_cpp_string_tests.py
@@ -0,0 +1,252 @@
+#!/usr/bin/env python
+#
+# Copyright 2016 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.
+
+"""Tests for java_cpp_string.py.
+
+This test suite contains various tests for the C++ -> Java string generator.
+"""
+
+import collections
+from datetime import date
+import optparse
+import os
+import sys
+import unittest
+
+import java_cpp_string
+from java_cpp_string import StringListDefinition, GenerateOutput, GetScriptName
+from java_cpp_string import CppStringFileParser
+
+sys.path.append(os.path.join(os.path.dirname(__file__), "gyp"))
+from util import build_utils
+
+class TestPreprocess(unittest.TestCase):
+  def testOutput(self):
+    definition = StringListDefinition(class_name='ClassName',
+                                      string_package='some.package',
+                                      entries=[('L1', 'hello'),
+                                               ('L2', 'world')])
+    output = GenerateOutput('path/to/file', definition)
+    expected = """
+// Copyright %d 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.
+
+// This file is autogenerated by
+//     %s
+// From
+//     path/to/file
+
+package some.package;
+
+public class ClassName {
+  public static final String L1 = "hello";
+  public static final String L2 = "world";
+}
+"""
+    self.assertEqual(expected % (date.today().year, GetScriptName()), output)
+
+  def testParseAndGenerate(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: some.package
+      // GENERATED_JAVA_CLASS_NAME: ClassName
+
+      // Name of the book.
+      const char NAME[] = "Mars";
+      // Serial number of the book.
+      const char SERIAL[] = "xx12345";
+      const char AUTHOR[] = "Bar";
+    """.split('\n')
+    definition = CppStringFileParser(test_data).ParseDefinitions()
+    output = GenerateOutput('path/to/file', definition)
+    expected = """
+// Copyright %d 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.
+
+// This file is autogenerated by
+//     %s
+// From
+//     path/to/file
+
+package some.package;
+
+public class ClassName {
+  public static final String NAME = "Mars";
+  public static final String SERIAL = "xx12345";
+  public static final String AUTHOR = "Bar";
+}
+"""
+    self.assertEqual(expected % (date.today().year, GetScriptName()), output)
+
+  def testParseSimpleString(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: test.package
+      // GENERATED_JAVA_CLASS_NAME: ClassName
+      const char STRING_ONE[] = "hello";
+      const char STRING_TWO[] = "world";
+    """.split('\n')
+    definition = CppStringFileParser(test_data).ParseDefinitions()
+    self.assertEqual('ClassName', definition.class_name)
+    self.assertEqual('test.package', definition.string_package)
+    self.assertEqual(collections.OrderedDict([('STRING_ONE', 'hello'),
+                                            ('STRING_TWO', 'world')]),
+                    definition.entries)
+
+  def testParseMultiLineString(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: test.package
+      // GENERATED_JAVA_CLASS_NAME: ClassName
+      const char MULTI_LINE_STRING[] =
+        "a_really_long_string";
+    """.split('\n')
+    definition = CppStringFileParser(test_data).ParseDefinitions()
+    self.assertEqual('ClassName', definition.class_name)
+    self.assertEqual('test.package', definition.string_package)
+    self.assertEqual(collections.OrderedDict([('MULTI_LINE_STRING',
+                                              'a_really_long_string')]),
+                    definition.entries)
+
+  def testParseComments(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: test.package
+      // GENERATED_JAVA_CLASS_NAME: ClassName
+      const char NAME[] = "Bar";
+      // const char NAME_IN_COMMENT[] = "Foo";
+    """.split('\n')
+    definition = CppStringFileParser(test_data).ParseDefinitions()
+    self.assertEqual(1, len(definition.entries))
+    self.assertEqual('ClassName', definition.class_name)
+    self.assertEqual('test.package', definition.string_package)
+    self.assertEqual(collections.OrderedDict([('NAME',
+                                              'Bar')]),
+                    definition.entries)
+
+  def testParseThrowsOnMissingEndOfMultiLineStringDefinition(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: test.package
+      // GENERATED_JAVA_CLASS_NAME: ClassName
+      const char IMCOMPLETE_STRING[] =
+      // Oops! I forgot to complete the string above.
+      const char NAME[] = "foo";
+    """.split('\n')
+    with self.assertRaises(Exception):
+      CppStringFileParser(test_data).ParseDefinitions()
+
+  def testParseThrowsOnUnknownDirective(self):
+    test_data = """
+      // GENERATED_JAVA_UNKNOWN: Value
+      const char NAME[] = "foo";
+    """.split('\n')
+    with self.assertRaises(Exception):
+      CppStringFileParser(test_data).ParseDefinitions()
+
+  def testParseThrowsOnMissingClassDirective(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: test.package
+      const char NAME[] = "foo";
+    """.split('\n')
+    with self.assertRaises(Exception):
+      CppStringFileParser(test_data).ParseDefinitions()
+
+  def testParseSimpleMultiLineDirective(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: (
+      //   test.namespace)
+      // GENERATED_JAVA_CLASS_NAME: Bar
+      const char NAME[] = "foo";
+    """.split('\n')
+    definition = CppStringFileParser(test_data).ParseDefinitions()
+    self.assertEqual('test.namespace', definition.string_package)
+    self.assertEqual('Bar', definition.class_name)
+
+  def testParseMultiLineDirective(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: (te
+      //   st.name
+      //   space)
+      // GENERATED_JAVA_CLASS_NAME: Bar
+      const char NAME[] = "foo";
+    """.split('\n')
+    definition = CppStringFileParser(test_data).ParseDefinitions()
+    self.assertEqual('test.namespace', definition.string_package)
+
+  def testParseTwoMultilineDirectives(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: (
+      //   test.namespace)
+      // GENERATED_JAVA_CLASS_NAME: (
+      //   Ba
+      //   r
+      //   )
+      const char NAME[] = "foo";
+    """.split('\n')
+    definition = CppStringFileParser(test_data).ParseDefinitions()
+    self.assertEqual('test.namespace', definition.string_package)
+    self.assertEqual('Bar', definition.class_name)
+
+  def testParseMalformedMultiLineDirectiveWithOtherDirective(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: (
+      //   test.name
+      //   space
+      // GENERATED_JAVA_CLASS_NAME: Bar
+      const char NAME[] = "foo";
+    """.split('\n')
+    with self.assertRaises(Exception):
+      CppStringFileParser(test_data).ParseDefinitions()
+
+  def testParseMalformedMultiLineDirective(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: (
+      //   test.name
+      //   space
+      const char NAME[] = "foo";
+    """.split('\n')
+    with self.assertRaises(Exception):
+      CppStringFileParser(test_data).ParseDefinitions()
+
+  def testParseThrowsOnMissingDerectivesBeforeStringDefinition(self):
+    test_data = """
+      const char STRING_BEFORE_DIRECTIVE[] = "foo";
+      // GENERATED_JAVA_STRING_PACKAGE: test.package
+      // GENERATED_JAVA_CLASS_NAME: ClassName
+      const char STRING_AFTER_DIRECTIVE[] = "bar";
+    """.split('\n')
+    with self.assertRaises(Exception):
+      CppStringFileParser(test_data).ParseDefinitions()
+
+  def testParseMalformedMultiLineDirectiveShort(self):
+    test_data = """
+      // GENERATED_JAVA_STRING_PACKAGE: (
+      const char NAME[] = "foo";
+    """.split('\n')
+    with self.assertRaises(Exception):
+      CppStringFileParser(test_data).ParseDefinitions()
+
+  def testGenerateThrowsOnEmptyInput(self):
+    with self.assertRaises(Exception):
+      original_do_parse = java_cpp_string.DoParseHeaderFile
+      try:
+        java_cpp_string.DoParseHeaderFile = lambda _: []
+        for _ in java_cpp_string.DoGenerate(['file']):
+          pass
+      finally:
+        java_cpp_string.DoParseHeaderFile = original_do_parse
+
+def main(argv):
+  parser = optparse.OptionParser()
+  parser.add_option("--stamp", help="File to touch on success.")
+  options, _ = parser.parse_args(argv)
+
+  suite = unittest.TestLoader().loadTestsFromTestCase(TestPreprocess)
+  unittest.TextTestRunner(verbosity=0).run(suite)
+
+  if options.stamp:
+    build_utils.Touch(options.stamp)
+
+if __name__ == '__main__':
+  main(sys.argv[1:])