chrome/test/base/v8_unit_test.h

   1 // Copyright (c) 2011 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_V8_UNIT_TEST_H_
   6 #define CHROME_TEST_BASE_V8_UNIT_TEST_H_
   7
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/files/file_path.h"
  12 #include "base/strings/string_piece.h"
  13 #include "testing/gtest/include/gtest/gtest.h"
  14 #include "v8/include/v8.h"
  15
  16 // A superclass for unit tests that involve running JavaScript.  This class
  17 // sets up V8 context and has methods that make it easy to execute scripts in
  18 // this context as well as call functions in the context.
  19 class V8UnitTest : public testing::Test {
  20  public:
  21   V8UnitTest();
  22   ~V8UnitTest() override;
  23
  24   // Methods from testing::Test.
  25   void SetUp() override;
  26
  27  protected:
  28   // Add a custom helper JS library for your test. If |library_path| is
  29   // relative, it'll be read as relative to the test data dir.
  30   void AddLibrary(const base::FilePath& library_path);
  31
  32   // Runs |test_fixture|.|test_name| using the framework in test_api.js.
  33   bool RunJavascriptTestF(const std::string& test_fixture,
  34                           const std::string& test_name);
  35
  36   // Executes the given |script_source| in the context. The specified
  37   // |script_name| is used when reporting errors.
  38   virtual void ExecuteScriptInContext(const base::StringPiece& script_source,
  39                                       const base::StringPiece& script_name);
  40
  41   // Set the variable |var_name| to a string |value| in the global scope.
  42   virtual void SetGlobalStringVar(const std::string& var_name,
  43                                   const std::string& value);
  44
  45   // Converts the v8::TryCatch |try_catch| into a human readable string.
  46   virtual std::string ExceptionToString(const v8::TryCatch& try_catch);
  47
  48   // Calls the specified |function_name| that resides in the global scope of the
  49   // context. If the function throws an exception, FAIL() is called to indicate
  50   // a unit test failure. This is useful for executing unit test functions
  51   // implemented in JavaScript.
  52   virtual void TestFunction(const std::string& function_name);
  53
  54   // This method is bound to a global function "log" in the context, as well as
  55   // to log, warn, and info of the console object. Scripts running in the
  56   // context can call this with |args| to print out logging information to the
  57   // console.
  58   static void Log(const v8::FunctionCallbackInfo<v8::Value>& args);
  59
  60   // This method is bound to console.error in the context. Any calls to this
  61   // will log |args| to the console and also signal an error condition causing
  62   // |RunJavascriptF| to fail.
  63   static void Error(const v8::FunctionCallbackInfo<v8::Value>& args);
  64
  65   // This method is bound to a method "chrome.send" in the context. When
  66   // test_api calls testDone with |args| to report its results, this will
  67   // capture and hold the results for analysis by |RunJavascriptF|.
  68   static void ChromeSend(const v8::FunctionCallbackInfo<v8::Value>& args);
  69
  70  private:
  71   // Executes all added javascript libraries. Returns true if no errors.
  72   bool ExecuteJavascriptLibraries();
  73
  74   // Initializes paths and libraries.
  75   void InitPathsAndLibraries();
  76
  77   // Handle scope that is used throughout the life of this class.
  78   v8::HandleScope handle_scope_;
  79
  80   // Context for the JavaScript in the test.
  81   v8::Persistent<v8::Context> context_;
  82
  83   // User added libraries.
  84   std::vector<base::FilePath> user_libraries_;
  85 };
  86
  87 #endif  // CHROME_TEST_BASE_V8_UNIT_TEST_H_