chrome/test/base/module_system_test.h

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_TEST_BASE_MODULE_SYSTEM_TEST_H_
   6 #define CHROME_TEST_BASE_MODULE_SYSTEM_TEST_H_
   7
   8 #include "chrome/renderer/extensions/module_system.h"
   9 #include "v8/include/v8.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11
  12 class AssertNatives;
  13 class StringSourceMap;
  14
  15 // Test fixture for testing JS that makes use of the module system.
  16 //
  17 // Typically tests will look like:
  18 //
  19 // TEST_F(MyModuleSystemTest, TestStuff) {
  20 //   ModuleSystem::NativesEnabledScope natives_enabled(module_system_.get());
  21 //   RegisterModule("test", "requireNative('assert').AssertTrue(true);");
  22 //   module_system_->Require("test");
  23 // }
  24 //
  25 // By default a test will fail if no method in the native module 'assert' is
  26 // called. This behaviour can be overridden by calling ExpectNoAssertionsMade().
  27 class ModuleSystemTest : public testing::Test {
  28  public:
  29   ModuleSystemTest();
  30   virtual ~ModuleSystemTest();
  31
  32   virtual void TearDown() OVERRIDE;
  33
  34  protected:
  35   // Register a named JS module in the module system.
  36   void RegisterModule(const std::string& name, const std::string& code);
  37
  38   // Register a named JS module with source retrieved from a ResourceBundle.
  39   void RegisterModule(const std::string& name, int resource_id);
  40
  41   // Register a named JS module in the module system and tell the module system
  42   // to use it to handle any requireNative() calls for native modules with that
  43   // name.
  44   void OverrideNativeHandler(const std::string& name, const std::string& code);
  45
  46   // Make the test fail if any asserts are called. By default a test will fail
  47   // if no asserts are called.
  48   void ExpectNoAssertionsMade();
  49
  50   // Create an empty object in the global scope with name |name|.
  51   v8::Handle<v8::Object> CreateGlobal(const std::string& name);
  52
  53   v8::Persistent<v8::Context> context_;
  54   v8::HandleScope handle_scope_;
  55   AssertNatives* assert_natives_;
  56   scoped_ptr<StringSourceMap> source_map_;
  57   scoped_ptr<extensions::ModuleSystem> module_system_;
  58   bool should_assertions_be_made_;
  59 };
  60
  61 #endif  // CHROME_TEST_BASE_MODULE_SYSTEM_TEST_H_