Merge pull request #1551 from gennadiycivil/master

gmock actions 2

12 files changed, 290 insertions, 27 deletions

diff --git a/googlemock/include/gmock/gmock-actions.h b/googlemock/include/gmock/gmock-actions.h
index 90fd2ea6..a2784f63 100644
--- a/googlemock/include/gmock/gmock-actions.h
+++ b/googlemock/include/gmock/gmock-actions.h
@@ -360,14 +360,20 @@ class Action {
 
   // Constructs a null Action.  Needed for storing Action objects in
   // STL containers.
-  Action() : impl_(NULL) {}
+  Action() {}
 
-  // Constructs an Action from its implementation.  A NULL impl is
-  // used to represent the "do-default" action.
-  explicit Action(ActionInterface<F>* impl) : impl_(impl) {}
+#if GTEST_LANG_CXX11
+  // Construct an Action from a specified callable.
+  // This cannot take std::function directly, because then Action would not be
+  // directly constructible from lambda (it would require two conversions).
+  template <typename G,
+            typename = typename ::std::enable_if<
+                ::std::is_constructible<::std::function<F>, G>::value>::type>
+  Action(G&& fun) : fun_(::std::forward<G>(fun)) {}  // NOLINT
+#endif
 
-  // Copy constructor.
-  Action(const Action& action) : impl_(action.impl_) {}
+  // Constructs an Action from its implementation.
+  explicit Action(ActionInterface<F>* impl) : impl_(impl) {}
 
   // This constructor allows us to turn an Action<Func> object into an
   // Action<F>, as long as F's arguments can be implicitly converted
@@ -377,7 +383,13 @@ class Action {
   explicit Action(const Action<Func>& action);
 
   // Returns true iff this is the DoDefault() action.
-  bool IsDoDefault() const { return impl_.get() == NULL; }
+  bool IsDoDefault() const {
+#if GTEST_LANG_CXX11
+    return impl_ == nullptr && fun_ == nullptr;
+#else
+    return impl_ == NULL;
+#endif
+  }
 
   // Performs the action.  Note that this method is const even though
   // the corresponding method in ActionInterface is not.  The reason
@@ -385,14 +397,15 @@ class Action {
   // another concrete action, not that the concrete action it binds to
   // cannot change state.  (Think of the difference between a const
   // pointer and a pointer to const.)
-  Result Perform(const ArgumentTuple& args) const {
-    internal::Assert(
-        !IsDoDefault(), __FILE__, __LINE__,
-        "You are using DoDefault() inside a composite action like "
-        "DoAll() or WithArgs().  This is not supported for technical "
-        "reasons.  Please instead spell out the default action, or "
-        "assign the default action to an Action variable and use "
-        "the variable in various places.");
+  Result Perform(ArgumentTuple args) const {
+    if (IsDoDefault()) {
+      internal::IllegalDoDefault(__FILE__, __LINE__);
+    }
+#if GTEST_LANG_CXX11
+    if (fun_ != nullptr) {
+      return internal::Apply(fun_, ::std::move(args));
+    }
+#endif
     return impl_->Perform(args);
   }
 
@@ -400,6 +413,18 @@ class Action {
   template <typename F1, typename F2>
   friend class internal::ActionAdaptor;
 
+  template <typename G>
+  friend class Action;
+
+  // In C++11, Action can be implemented either as a generic functor (through
+  // std::function), or legacy ActionInterface. In C++98, only ActionInterface
+  // is available. The invariants are as follows:
+  // * in C++98, impl_ is null iff this is the default action
+  // * in C++11, at most one of fun_ & impl_ may be nonnull; both are null iff
+  //   this is the default action
+#if GTEST_LANG_CXX11
+  ::std::function<F> fun_;
+#endif
   internal::linked_ptr<ActionInterface<F> > impl_;
 };
 
@@ -531,6 +556,9 @@ struct ByMoveWrapper {
 // statement, and conversion of the result of Return to Action<T(U)> is a
 // good place for that.
 //
+// The real life example of the above scenario happens when an invocation
+// of gtl::Container() is passed into Return.
+//
 template <typename R>
 class ReturnAction {
  public:
@@ -750,7 +778,7 @@ class DoDefaultAction {
   // This template type conversion operator allows DoDefault() to be
   // used in any function.
   template <typename F>
-  operator Action<F>() const { return Action<F>(NULL); }
+  operator Action<F>() const { return Action<F>(); }  // NOLINT
 };
 
 // Implements the Assign action to set a given pointer referent to a
@@ -886,6 +914,28 @@ class InvokeMethodWithoutArgsAction {
   GTEST_DISALLOW_ASSIGN_(InvokeMethodWithoutArgsAction);
 };
 
+// Implements the InvokeWithoutArgs(callback) action.
+template <typename CallbackType>
+class InvokeCallbackWithoutArgsAction {
+ public:
+  // The c'tor takes ownership of the callback.
+  explicit InvokeCallbackWithoutArgsAction(CallbackType* callback)
+      : callback_(callback) {
+    callback->CheckIsRepeatable();  // Makes sure the callback is permanent.
+  }
+
+  // This type conversion operator template allows Invoke(callback) to
+  // be used wherever the callback's return type can be implicitly
+  // converted to that of the mock function.
+  template <typename Result, typename ArgumentTuple>
+  Result Perform(const ArgumentTuple&) const { return callback_->Run(); }
+
+ private:
+  const internal::linked_ptr<CallbackType> callback_;
+
+  GTEST_DISALLOW_ASSIGN_(InvokeCallbackWithoutArgsAction);
+};
+
 // Implements the IgnoreResult(action) action.
 template <typename A>
 class IgnoreResultAction {
@@ -1053,7 +1103,13 @@ typedef internal::IgnoredValue Unused;
 template <typename To>
 template <typename From>
 Action<To>::Action(const Action<From>& from)
-    : impl_(new internal::ActionAdaptor<To, From>(from)) {}
+    :
+#if GTEST_LANG_CXX11
+      fun_(from.fun_),
+#endif
+      impl_(from.impl_ == NULL ? NULL
+                               : new internal::ActionAdaptor<To, From>(from)) {
+}
 
 // Creates an action that returns 'value'.  'value' is passed by value
 // instead of const reference - otherwise Return("string literal")
diff --git a/googlemock/include/gmock/gmock-generated-actions.h b/googlemock/include/gmock/gmock-generated-actions.h
index be4ebe4f..b35303e2 100644
--- a/googlemock/include/gmock/gmock-generated-actions.h
+++ b/googlemock/include/gmock/gmock-generated-actions.h
@@ -1,4 +1,6 @@
-// This file was GENERATED by a script.  DO NOT EDIT BY HAND!!!
+// This file was GENERATED by command:
+//     pump.py gmock-generated-actions.h.pump
+// DO NOT EDIT BY HAND!!!
 
 // Copyright 2007, Google Inc.
 // All rights reserved.
diff --git a/googlemock/include/gmock/gmock-generated-actions.h.pump b/googlemock/include/gmock/gmock-generated-actions.h.pump
index 712f65d6..e0c21359 100644
--- a/googlemock/include/gmock/gmock-generated-actions.h.pump
+++ b/googlemock/include/gmock/gmock-generated-actions.h.pump
@@ -1,5 +1,5 @@
 $$ -*- mode: c++; -*-
-$$ This is a Pump source file.  Please use Pump to convert it to
+$$ This is a Pump source file. Please use Pump to convert it to
 $$ gmock-generated-actions.h.
 $$
 $var n = 10  $$ The maximum arity we support.
diff --git a/googlemock/include/gmock/gmock-generated-matchers.h.pump b/googlemock/include/gmock/gmock-generated-matchers.h.pump
index 25d2da99..4fe0a61c 100644
--- a/googlemock/include/gmock/gmock-generated-matchers.h.pump
+++ b/googlemock/include/gmock/gmock-generated-matchers.h.pump
@@ -1,6 +1,6 @@
 $$ -*- mode: c++; -*-
-$$ This is a Pump source file.  Please use Pump to convert it to
-$$ gmock-generated-actions.h.
+$$ This is a Pump source file. Please use Pump to convert
+$$ it to gmock-generated-matchers.h.
 $$
 $var n = 10  $$ The maximum arity we support.
 $$ }} This line fixes auto-indentation of the following code in Emacs.
diff --git a/googlemock/include/gmock/gmock-generated-nice-strict.h.pump b/googlemock/include/gmock/gmock-generated-nice-strict.h.pump
index 4973c356..378c40f1 100644
--- a/googlemock/include/gmock/gmock-generated-nice-strict.h.pump
+++ b/googlemock/include/gmock/gmock-generated-nice-strict.h.pump
@@ -1,6 +1,6 @@
 $$ -*- mode: c++; -*-
-$$ This is a Pump source file.  Please use Pump to convert it to
-$$ gmock-generated-nice-strict.h.
+$$ This is a Pump source file. Please use Pump to convert
+$$ it to gmock-generated-nice-strict.h.
 $$
 $var n = 10  $$ The maximum arity we support.
 // Copyright 2008, Google Inc.
diff --git a/googlemock/include/gmock/gmock-more-matchers.h b/googlemock/include/gmock/gmock-more-matchers.h
index 01298cfa..6d810eb7 100644
--- a/googlemock/include/gmock/gmock-more-matchers.h
+++ b/googlemock/include/gmock/gmock-more-matchers.h
@@ -46,8 +46,11 @@ namespace testing {
 // Silence C4100 (unreferenced formal
 // parameter) for MSVC
 #ifdef _MSC_VER
+# pragma warning(push)
 # pragma warning(disable:4100)
 #if (_MSC_VER == 1900)
+// and silence C4800 (C4800: 'int *const ': forcing value
+// to bool 'true' or 'false') for MSVC 14
 # pragma warning(disable:4800)
   #endif
 #endif
@@ -78,6 +81,11 @@ MATCHER(IsFalse, negation ? "is true" : "is false") {
   return !static_cast<bool>(arg);
 }
 
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+
 }  // namespace testing
 
 #endif  // GMOCK_GMOCK_MORE_MATCHERS_H_
diff --git a/googlemock/include/gmock/internal/custom/gmock-generated-actions.h.pump b/googlemock/include/gmock/internal/custom/gmock-generated-actions.h.pump
index d26c8a08..03cfd8c5 100644
--- a/googlemock/include/gmock/internal/custom/gmock-generated-actions.h.pump
+++ b/googlemock/include/gmock/internal/custom/gmock-generated-actions.h.pump
@@ -1,5 +1,5 @@
 $$ -*- mode: c++; -*-
-$$ This is a Pump source file (http://go/pump).  Please use Pump to convert
+$$ This is a Pump source file. Please use Pump to convert
 $$ it to callback-actions.h.
 $$
 $var max_callback_arity = 5
diff --git a/googlemock/include/gmock/internal/gmock-internal-utils.h b/googlemock/include/gmock/internal/gmock-internal-utils.h
index 37ceb549..20c95c6a 100644
--- a/googlemock/include/gmock/internal/gmock-internal-utils.h
+++ b/googlemock/include/gmock/internal/gmock-internal-utils.h
@@ -48,6 +48,14 @@
 namespace testing {
 namespace internal {
 
+// Silence MSVC C4100 (unreferenced formal parameter) and
+// C4805('==': unsafe mix of type 'const int' and type 'const bool')
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4100)
+# pragma warning(disable:4805)
+#endif
+
 // Joins a vector of strings as if they are fields of a tuple; returns
 // the joined string.
 GTEST_API_ std::string JoinAsTuple(const Strings& fields);
@@ -510,7 +518,7 @@ struct BooleanConstant {};
 
 // Emit an assertion failure due to incorrect DoDefault() usage. Out-of-lined to
 // reduce code size.
-void IllegalDoDefault(const char* file, int line);
+GTEST_API_ void IllegalDoDefault(const char* file, int line);
 
 #if GTEST_LANG_CXX11
 // Helper types for Apply() below.
@@ -539,6 +547,12 @@ auto Apply(F&& f, Tuple&& args)
                    make_int_pack<std::tuple_size<Tuple>::value>());
 }
 #endif
+
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
 }  // namespace internal
 }  // namespace testing
 
diff --git a/googlemock/src/gmock-internal-utils.cc b/googlemock/src/gmock-internal-utils.cc
index 20c5a8db..3fca3f26 100644
--- a/googlemock/src/gmock-internal-utils.cc
+++ b/googlemock/src/gmock-internal-utils.cc
@@ -188,7 +188,7 @@ GTEST_API_ void Log(LogSeverity severity, const std::string& message,
   std::cout << ::std::flush;
 }
 
-void IllegalDoDefault(const char* file, int line) {
+GTEST_API_ void IllegalDoDefault(const char* file, int line) {
   internal::Assert(
       false, file, line,
       "You are using DoDefault() inside a composite action like "
diff --git a/googlemock/src/gmock-spec-builders.cc b/googlemock/src/gmock-spec-builders.cc
index b97bad03..22d002fe 100644
--- a/googlemock/src/gmock-spec-builders.cc
+++ b/googlemock/src/gmock-spec-builders.cc
@@ -49,6 +49,15 @@
 # include <unistd.h>  // NOLINT
 #endif
 
+// Silence C4800 (C4800: 'int *const ': forcing value
+// to bool 'true' or 'false') for MSVC 14,15
+#ifdef _MSC_VER
+#if _MSC_VER <= 1900
+#  pragma warning(push)
+#  pragma warning(disable:4800)
+#endif
+#endif
+
 namespace testing {
 namespace internal {
 
@@ -866,3 +875,9 @@ InSequence::~InSequence() {
 }
 
 }  // namespace testing
+
+#ifdef _MSC_VER
+#if _MSC_VER <= 1900
+#  pragma warning(pop)
+#endif
+#endif
diff --git a/googlemock/test/gmock-actions_test.cc b/googlemock/test/gmock-actions_test.cc
index 46011570..5dd48460 100644
--- a/googlemock/test/gmock-actions_test.cc
+++ b/googlemock/test/gmock-actions_test.cc
@@ -33,6 +33,15 @@
 //
 // This file tests the built-in actions.
 
+// Silence C4800 (C4800: 'int *const ': forcing value
+// to bool 'true' or 'false') for MSVC 14,15
+#ifdef _MSC_VER
+#if _MSC_VER <= 1900
+#  pragma warning(push)
+#  pragma warning(disable:4800)
+#endif
+#endif
+
 #include "gmock/gmock-actions.h"
 #include <algorithm>
 #include <iterator>
@@ -65,6 +74,7 @@ using testing::ReturnRef;
 using testing::ReturnRefOfCopy;
 using testing::SetArgPointee;
 using testing::SetArgumentPointee;
+using testing::Unused;
 using testing::_;
 using testing::get;
 using testing::internal::BuiltInDefaultValue;
@@ -705,6 +715,8 @@ class MockClass {
   MOCK_METHOD0(MakeUniqueBase, std::unique_ptr<Base>());
   MOCK_METHOD0(MakeVectorUnique, std::vector<std::unique_ptr<int>>());
   MOCK_METHOD1(TakeUnique, int(std::unique_ptr<int>));
+  MOCK_METHOD2(TakeUnique,
+               int(const std::unique_ptr<int>&, std::unique_ptr<int>));
 #endif
 
  private:
@@ -756,7 +768,7 @@ TEST(DoDefaultDeathTest, DiesIfUsedInCompositeAction) {
 }
 
 // Tests that DoDefault() returns the default value set by
-// DefaultValue<T>::Set() when it's not overridden by an ON_CALL().
+// DefaultValue<T>::Set() when it's not overriden by an ON_CALL().
 TEST(DoDefaultTest, ReturnsUserSpecifiedPerTypeDefaultValueWhenThereIsOne) {
   DefaultValue<int>::Set(1);
   MockClass mock;
@@ -1411,6 +1423,152 @@ TEST(MockMethodTest, CanReturnMoveOnlyValue_Invoke) {
   EXPECT_EQ(7, *vresult[0]);
 }
 
+TEST(MockMethodTest, CanTakeMoveOnlyValue) {
+  MockClass mock;
+  auto make = [](int i) { return std::unique_ptr<int>(new int(i)); };
+
+  EXPECT_CALL(mock, TakeUnique(_)).WillRepeatedly([](std::unique_ptr<int> i) {
+    return *i;
+  });
+  // DoAll() does not compile, since it would move from its arguments twice.
+  // EXPECT_CALL(mock, TakeUnique(_, _))
+  //     .WillRepeatedly(DoAll(Invoke([](std::unique_ptr<int> j) {}),
+  //     Return(1)));
+  EXPECT_CALL(mock, TakeUnique(testing::Pointee(7)))
+      .WillOnce(Return(-7))
+      .RetiresOnSaturation();
+  EXPECT_CALL(mock, TakeUnique(testing::IsNull()))
+      .WillOnce(Return(-1))
+      .RetiresOnSaturation();
+
+  EXPECT_EQ(5, mock.TakeUnique(make(5)));
+  EXPECT_EQ(-7, mock.TakeUnique(make(7)));
+  EXPECT_EQ(7, mock.TakeUnique(make(7)));
+  EXPECT_EQ(7, mock.TakeUnique(make(7)));
+  EXPECT_EQ(-1, mock.TakeUnique({}));
+
+  // Some arguments are moved, some passed by reference.
+  auto lvalue = make(6);
+  EXPECT_CALL(mock, TakeUnique(_, _))
+      .WillOnce([](const std::unique_ptr<int>& i, std::unique_ptr<int> j) {
+        return *i * *j;
+      });
+  EXPECT_EQ(42, mock.TakeUnique(lvalue, make(7)));
+
+  // The unique_ptr can be saved by the action.
+  std::unique_ptr<int> saved;
+  EXPECT_CALL(mock, TakeUnique(_)).WillOnce([&saved](std::unique_ptr<int> i) {
+    saved = std::move(i);
+    return 0;
+  });
+  EXPECT_EQ(0, mock.TakeUnique(make(42)));
+  EXPECT_EQ(42, *saved);
+}
+
 #endif  // GTEST_HAS_STD_UNIQUE_PTR_
 
+#if GTEST_LANG_CXX11
+// Tests for std::function based action.
+
+int Add(int val, int& ref, int* ptr) {  // NOLINT
+  int result = val + ref + *ptr;
+  ref = 42;
+  *ptr = 43;
+  return result;
+}
+
+int Deref(std::unique_ptr<int> ptr) { return *ptr; }
+
+struct Double {
+  template <typename T>
+  T operator()(T t) { return 2 * t; }
+};
+
+std::unique_ptr<int> UniqueInt(int i) {
+  return std::unique_ptr<int>(new int(i));
+}
+
+TEST(FunctorActionTest, ActionFromFunction) {
+  Action<int(int, int&, int*)> a = &Add;
+  int x = 1, y = 2, z = 3;
+  EXPECT_EQ(6, a.Perform(std::forward_as_tuple(x, y, &z)));
+  EXPECT_EQ(42, y);
+  EXPECT_EQ(43, z);
+
+  Action<int(std::unique_ptr<int>)> a1 = &Deref;
+  EXPECT_EQ(7, a1.Perform(std::make_tuple(UniqueInt(7))));
+}
+
+TEST(FunctorActionTest, ActionFromLambda) {
+  Action<int(bool, int)> a1 = [](bool b, int i) { return b ? i : 0; };
+  EXPECT_EQ(5, a1.Perform(make_tuple(true, 5)));
+  EXPECT_EQ(0, a1.Perform(make_tuple(false, 5)));
+
+  std::unique_ptr<int> saved;
+  Action<void(std::unique_ptr<int>)> a2 = [&saved](std::unique_ptr<int> p) {
+    saved = std::move(p);
+  };
+  a2.Perform(make_tuple(UniqueInt(5)));
+  EXPECT_EQ(5, *saved);
+}
+
+TEST(FunctorActionTest, PolymorphicFunctor) {
+  Action<int(int)> ai = Double();
+  EXPECT_EQ(2, ai.Perform(make_tuple(1)));
+  Action<double(double)> ad = Double();  // Double? Double double!
+  EXPECT_EQ(3.0, ad.Perform(make_tuple(1.5)));
+}
+
+TEST(FunctorActionTest, TypeConversion) {
+  // Numeric promotions are allowed.
+  const Action<bool(int)> a1 = [](int i) { return i > 1; };
+  const Action<int(bool)> a2 = Action<int(bool)>(a1);
+  EXPECT_EQ(1, a1.Perform(make_tuple(42)));
+  EXPECT_EQ(0, a2.Perform(make_tuple(42)));
+
+  // Implicit constructors are allowed.
+  const Action<bool(std::string)> s1 = [](std::string s) { return !s.empty(); };
+  const Action<int(const char*)> s2 = Action<int(const char*)>(s1);
+  EXPECT_EQ(0, s2.Perform(make_tuple("")));
+  EXPECT_EQ(1, s2.Perform(make_tuple("hello")));
+
+  // Also between the lambda and the action itself.
+  const Action<bool(std::string)> x = [](Unused) { return 42; };
+  EXPECT_TRUE(x.Perform(make_tuple("hello")));
+}
+
+TEST(FunctorActionTest, UnusedArguments) {
+  // Verify that users can ignore uninteresting arguments.
+  Action<int(int, std::unique_ptr<int>, const int&)> a =
+      [](int i, Unused, Unused) { return 2 * i; };
+  EXPECT_EQ(6, a.Perform(make_tuple(3, UniqueInt(7), 9)));
+}
+
+// Test that basic built-in actions work with move-only arguments.
+// TODO(rburny): Currently, almost all ActionInterface-based actions will not
+// work, even if they only try to use other, copyable arguments. Implement them
+// if necessary (but note that DoAll cannot work on non-copyable types anyway -
+// so maybe it's better to make users use lambdas instead.
+TEST(MoveOnlyArgumentsTest, ReturningActions) {
+  Action<int(std::unique_ptr<int>)> a = Return(1);
+  EXPECT_EQ(1, a.Perform(make_tuple(nullptr)));
+
+  a = testing::WithoutArgs([]() { return 7; });
+  EXPECT_EQ(7, a.Perform(make_tuple(nullptr)));
+
+  Action<void(std::unique_ptr<int>, int*)> a2 = testing::SetArgPointee<1>(3);
+  int x = 0;
+  a2.Perform(make_tuple(nullptr, &x));
+  EXPECT_EQ(x, 3);
+}
+
+#endif  // GTEST_LANG_CXX11
+
 }  // Unnamed namespace
+
+#ifdef _MSC_VER
+#if _MSC_VER == 1900
+#  pragma warning(pop)
+#endif
+#endif
+
diff --git a/googlemock/test/gmock_output_test_.cc b/googlemock/test/gmock_output_test_.cc
index ca628df6..1b59eb3f 100644
--- a/googlemock/test/gmock_output_test_.cc
+++ b/googlemock/test/gmock_output_test_.cc
@@ -39,6 +39,12 @@
 
 #include "gtest/gtest.h"
 
+// Silence C4100 (unreferenced formal parameter)
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable:4100)
+#endif
+
 using testing::_;
 using testing::AnyNumber;
 using testing::Ge;
@@ -298,3 +304,7 @@ int main(int argc, char **argv) {
   TestCatchesLeakedMocksInAdHocTests();
   return RUN_ALL_TESTS();
 }
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif