Changes test creation functions to factories. By Vlad Losev.

CONTRIBUTORS

@@ -24,4 +24,5 @@ Russ Rufer <russ@pentad.com>
 Sean Mcafee <eefacm@gmail.com>
 Sigurður Ásgeirsson <siggi@google.com>
 Tracy Bialik <tracy@pentad.com>
+Vlad Losev <vladl@google.com>
 Zhanyong Wan <wan@google.com>

include/gtest/gtest.h

@@ -310,11 +310,6 @@ class Test {
 };
 
 
-// Defines the type of a function pointer that creates a Test object
-// when invoked.
-typedef Test* (*TestMaker)();
-
-
 // A TestInfo object stores the following information about a test:
 //
 //   Test case name
@@ -342,7 +337,9 @@ class TestInfo {
   //   fixture_class_id: ID of the test fixture class
   //   set_up_tc:        pointer to the function that sets up the test case
   //   tear_down_tc:     pointer to the function that tears down the test case
-  //   maker:            pointer to the function that creates a test object
+  //   factory:          Pointer to the factory that creates a test object.
+  //                     The newly created TestInfo instance will assume
+  //                     ownershi pof the factory object.
   //
   // This is public only because it's needed by the TEST and TEST_F macros.
   // INTERNAL IMPLEMENTATION - DO NOT USE IN A USER PROGRAM.
@@ -352,7 +349,7 @@ class TestInfo {
       internal::TypeId fixture_class_id,
       Test::SetUpTestCaseFunc set_up_tc,
       Test::TearDownTestCaseFunc tear_down_tc,
-      TestMaker maker);
+      internal::TestFactoryBase* factory);
 
   // Returns the test case name.
   const char* test_case_name() const;
@@ -395,9 +392,11 @@ class TestInfo {
   internal::TestInfoImpl* impl() { return impl_; }
   const internal::TestInfoImpl* impl() const { return impl_; }
 
-  // Constructs a TestInfo object.
+  // Constructs a TestInfo object. The newly constructed instance assumes
+  // ownership of the factory object.
   TestInfo(const char* test_case_name, const char* name,
-           internal::TypeId fixture_class_id, TestMaker maker);
+           internal::TypeId fixture_class_id,
+           internal::TestFactoryBase* factory);
 
   // An opaque implementation object.
   internal::TestInfoImpl* impl_;

include/gtest/internal/gtest-internal.h

@@ -98,6 +98,7 @@ namespace testing {
 // Forward declaration of classes.
 
 class Message;                         // Represents a failure message.
+class Test;                            // Represents a test.
 class TestCase;                        // A collection of related tests.
 class TestPartResult;                  // Result of a test part.
 class TestInfo;                        // Information about a test.
@@ -484,6 +485,31 @@ inline TypeId GetTypeId() {
   return &dummy;
 }
 
+// Defines the abstract factory interface that creates instances
+// of a Test object.
+class TestFactoryBase {
+ public:
+  virtual ~TestFactoryBase() {}
+
+  // Creates a test instance to run. The instance is both created and destroyed
+  // within TestInfoImpl::Run()
+  virtual Test* CreateTest() = 0;
+
+ protected:
+  TestFactoryBase() {}
+
+ private:
+  GTEST_DISALLOW_COPY_AND_ASSIGN(TestFactoryBase);
+};
+
+// This class provides implementation of TeastFactoryBase interface.
+// It is used in TEST and TEST_F macros.
+template <class TestClass>
+class TestFactoryImpl : public TestFactoryBase {
+ public:
+  virtual Test* CreateTest() { return new TestClass; }
+};
+
 #ifdef GTEST_OS_WINDOWS
 
 // Predicate-formatters for implementing the HRESULT checking macros
@@ -523,9 +549,6 @@ AssertionResult IsHRESULTFailure(const char* expr, long hr);  // NOLINT
 class test_case_name##_##test_name##_Test : public parent_class {\
  public:\
   test_case_name##_##test_name##_Test() {}\
-  static ::testing::Test* NewTest() {\
-    return new test_case_name##_##test_name##_Test;\
-  }\
  private:\
   virtual void TestBody();\
   static ::testing::TestInfo* const test_info_;\
@@ -533,13 +556,14 @@ class test_case_name##_##test_name##_Test : public parent_class {\
 };\
 \
 ::testing::TestInfo* const test_case_name##_##test_name##_Test::test_info_ =\
-  ::testing::TestInfo::MakeAndRegisterInstance(\
-    #test_case_name, \
-    #test_name, \
-    ::testing::internal::GetTypeId< parent_class >(), \
-    parent_class::SetUpTestCase, \
-    parent_class::TearDownTestCase, \
-    test_case_name##_##test_name##_Test::NewTest);\
+    ::testing::TestInfo::MakeAndRegisterInstance(\
+        #test_case_name, \
+        #test_name, \
+        ::testing::internal::GetTypeId< parent_class >(), \
+        parent_class::SetUpTestCase, \
+        parent_class::TearDownTestCase, \
+        new ::testing::internal::TestFactoryImpl<\
+            test_case_name##_##test_name##_Test>);\
 void test_case_name##_##test_name##_Test::TestBody()
 
 

src/gtest-internal-inl.h

@@ -542,7 +542,7 @@ class TestInfoImpl {
  public:
   TestInfoImpl(TestInfo* parent, const char* test_case_name,
                const char* name, TypeId fixture_class_id,
-               TestMaker maker);
+               internal::TestFactoryBase* factory);
   ~TestInfoImpl();
 
   // Returns true if this test should run.
@@ -595,7 +595,8 @@ class TestInfoImpl {
   const TypeId fixture_class_id_;  // ID of the test fixture class
   bool should_run_;                // True iff this test should run
   bool is_disabled_;               // True iff this test is disabled
-  const TestMaker maker_;          // The function that creates the test object
+  internal::TestFactoryBase* const factory_;  // The factory that creates
+                                              // the test object
 
   // This field is mutable and needs to be reset before running the
   // test for the second time.

src/gtest.cc

@@ -1882,13 +1882,14 @@ bool Test::HasFatalFailure() {
 
 // class TestInfo
 
-// Constructs a TestInfo object.
+// Constructs a TestInfo object. It assumes ownership of the test factory
+// object via impl_.
 TestInfo::TestInfo(const char* test_case_name,
                    const char* name,
                    internal::TypeId fixture_class_id,
-                   TestMaker maker) {
+                   internal::TestFactoryBase* factory) {
   impl_ = new internal::TestInfoImpl(this, test_case_name, name,
-                                     fixture_class_id, maker);
+                                     fixture_class_id, factory);
 }
 
 // Destructs a TestInfo object.
@@ -1905,16 +1906,17 @@ TestInfo::~TestInfo() {
 //   name:           name of the test
 //   set_up_tc:      pointer to the function that sets up the test case
 //   tear_down_tc:   pointer to the function that tears down the test case
-//   maker:          pointer to the function that creates a test object
+//   factory         factory object that creates a test object. The new
+//                   TestInfo instance assumes ownership of the factory object.
 TestInfo* TestInfo::MakeAndRegisterInstance(
     const char* test_case_name,
     const char* name,
     internal::TypeId fixture_class_id,
     Test::SetUpTestCaseFunc set_up_tc,
     Test::TearDownTestCaseFunc tear_down_tc,
-    TestMaker maker) {
+    internal::TestFactoryBase* factory) {
   TestInfo* const test_info =
-      new TestInfo(test_case_name, name, fixture_class_id, maker);
+      new TestInfo(test_case_name, name, fixture_class_id, factory);
   internal::GetUnitTestImpl()->AddTestInfo(set_up_tc, tear_down_tc, test_info);
   return test_info;
 }
@@ -2007,7 +2009,7 @@ void TestInfoImpl::Run() {
 
   __try {
     // Creates the test object.
-    test = (*maker_)();
+    test = factory_->CreateTest();
   } __except(internal::UnitTestOptions::GTestShouldProcessSEH(
       GetExceptionCode())) {
     AddExceptionThrownFailure(GetExceptionCode(),
@@ -2022,7 +2024,7 @@ void TestInfoImpl::Run() {
   // exception-safe.
 
   // Creates the test object.
-  Test* test = (*maker_)();
+  Test* test = factory_->CreateTest();
 #endif  // GTEST_OS_WINDOWS
 
   // Runs the test only if the constructor of the test fixture didn't
@@ -3417,23 +3419,25 @@ internal::TestResult* UnitTestImpl::current_test_result() {
     current_test_info_->impl()->result() : &ad_hoc_test_result_;
 }
 
-// TestInfoImpl constructor.
+// TestInfoImpl constructor. The new instance assumes ownership of the test
+// factory opbject.
 TestInfoImpl::TestInfoImpl(TestInfo* parent,
                            const char* test_case_name,
                            const char* name,
                            TypeId fixture_class_id,
-                           TestMaker maker) :
+                           internal::TestFactoryBase* factory) :
     parent_(parent),
     test_case_name_(String(test_case_name)),
     name_(String(name)),
     fixture_class_id_(fixture_class_id),
     should_run_(false),
     is_disabled_(false),
-    maker_(maker) {
+    factory_(factory) {
 }
 
 // TestInfoImpl destructor.
 TestInfoImpl::~TestInfoImpl() {
+  delete factory_;
 }
 
 }  // namespace internal