googletest/test/gmock_output_test_.cc

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// Author: wan@google.com (Zhanyong Wan)

// Tests Google Mock's output in various scenarios.  This ensures that
// Google Mock's messages are readable and useful.

#include <gmock/gmock.h>

#include <stdio.h>
#include <string>

#include <gtest/gtest.h>

using testing::_;
using testing::AnyNumber;
using testing::Ge;
using testing::InSequence;
using testing::Ref;
using testing::Return;
using testing::Sequence;

class MockFoo {
 public:
  MockFoo() {}

  MOCK_METHOD3(Bar, char(const std::string& s, int i, double x));
  MOCK_METHOD2(Bar2, bool(int x, int y));
  MOCK_METHOD2(Bar3, void(int x, int y));

 private:
  GTEST_DISALLOW_COPY_AND_ASSIGN_(MockFoo);
};

class GMockOutputTest : public testing::Test {
 protected:
  MockFoo foo_;
};

TEST_F(GMockOutputTest, ExpectedCall) {
  testing::GMOCK_FLAG(verbose) = "info";

  EXPECT_CALL(foo_, Bar2(0, _));
  foo_.Bar2(0, 0);  // Expected call

  testing::GMOCK_FLAG(verbose) = "warning";
}

TEST_F(GMockOutputTest, ExpectedCallToVoidFunction) {
  testing::GMOCK_FLAG(verbose) = "info";

  EXPECT_CALL(foo_, Bar3(0, _));
  foo_.Bar3(0, 0);  // Expected call

  testing::GMOCK_FLAG(verbose) = "warning";
}

TEST_F(GMockOutputTest, ExplicitActionsRunOut) {
  EXPECT_CALL(foo_, Bar2(_, _))
      .Times(2)
      .WillOnce(Return(false));
  foo_.Bar2(2, 2);
  foo_.Bar2(1, 1);  // Explicit actions in EXPECT_CALL run out.
}

TEST_F(GMockOutputTest, UnexpectedCall) {
  EXPECT_CALL(foo_, Bar2(0, _));

  foo_.Bar2(1, 0);  // Unexpected call
  foo_.Bar2(0, 0);  // Expected call
}

TEST_F(GMockOutputTest, UnexpectedCallToVoidFunction) {
  EXPECT_CALL(foo_, Bar3(0, _));

  foo_.Bar3(1, 0);  // Unexpected call
  foo_.Bar3(0, 0);  // Expected call
}

TEST_F(GMockOutputTest, ExcessiveCall) {
  EXPECT_CALL(foo_, Bar2(0, _));

  foo_.Bar2(0, 0);  // Expected call
  foo_.Bar2(0, 1);  // Excessive call
}

TEST_F(GMockOutputTest, ExcessiveCallToVoidFunction) {
  EXPECT_CALL(foo_, Bar3(0, _));

  foo_.Bar3(0, 0);  // Expected call
  foo_.Bar3(0, 1);  // Excessive call
}

TEST_F(GMockOutputTest, UninterestingCall) {
  foo_.Bar2(0, 1);  // Uninteresting call
}

TEST_F(GMockOutputTest, UninterestingCallToVoidFunction) {
  foo_.Bar3(0, 1);  // Uninteresting call
}

TEST_F(GMockOutputTest, RetiredExpectation) {
  EXPECT_CALL(foo_, Bar2(_, _))
      .RetiresOnSaturation();
  EXPECT_CALL(foo_, Bar2(0, 0));

  foo_.Bar2(1, 1);
  foo_.Bar2(1, 1);  // Matches a retired expectation
  foo_.Bar2(0, 0);
}

TEST_F(GMockOutputTest, UnsatisfiedPrerequisite) {
  {
    InSequence s;
    EXPECT_CALL(foo_, Bar(_, 0, _));
    EXPECT_CALL(foo_, Bar2(0, 0));
    EXPECT_CALL(foo_, Bar2(1, _));
  }

  foo_.Bar2(1, 0);  // Has one immediate unsatisfied pre-requisite
  foo_.Bar("Hi", 0, 0);
  foo_.Bar2(0, 0);
  foo_.Bar2(1, 0);
}

TEST_F(GMockOutputTest, UnsatisfiedPrerequisites) {
  Sequence s1, s2;

  EXPECT_CALL(foo_, Bar(_, 0, _))
      .InSequence(s1);
  EXPECT_CALL(foo_, Bar2(0, 0))
      .InSequence(s2);
  EXPECT_CALL(foo_, Bar2(1, _))
      .InSequence(s1, s2);

  foo_.Bar2(1, 0);  // Has two immediate unsatisfied pre-requisites
  foo_.Bar("Hi", 0, 0);
  foo_.Bar2(0, 0);
  foo_.Bar2(1, 0);
}

TEST_F(GMockOutputTest, UnsatisfiedWith) {
  EXPECT_CALL(foo_, Bar2(_, _)).With(Ge());
}

TEST_F(GMockOutputTest, UnsatisfiedExpectation) {
  EXPECT_CALL(foo_, Bar(_, _, _));
  EXPECT_CALL(foo_, Bar2(0, _))
      .Times(2);

  foo_.Bar2(0, 1);
}

TEST_F(GMockOutputTest, MismatchArguments) {
  const std::string s = "Hi";
  EXPECT_CALL(foo_, Bar(Ref(s), _, Ge(0)));

  foo_.Bar("Ho", 0, -0.1);  // Mismatch arguments
  foo_.Bar(s, 0, 0);
}

TEST_F(GMockOutputTest, MismatchWith) {
  EXPECT_CALL(foo_, Bar2(Ge(2), Ge(1)))
      .With(Ge());

  foo_.Bar2(2, 3);  // Mismatch With()
  foo_.Bar2(2, 1);
}

TEST_F(GMockOutputTest, MismatchArgumentsAndWith) {
  EXPECT_CALL(foo_, Bar2(Ge(2), Ge(1)))
      .With(Ge());

  foo_.Bar2(1, 3);  // Mismatch arguments and mismatch With()
  foo_.Bar2(2, 1);
}

TEST_F(GMockOutputTest, UnexpectedCallWithDefaultAction) {
  ON_CALL(foo_, Bar2(_, _))
      .WillByDefault(Return(true));   // Default action #1
  ON_CALL(foo_, Bar2(1, _))
      .WillByDefault(Return(false));  // Default action #2

  EXPECT_CALL(foo_, Bar2(2, 2));
  foo_.Bar2(1, 0);  // Unexpected call, takes default action #2.
  foo_.Bar2(0, 0);  // Unexpected call, takes default action #1.
  foo_.Bar2(2, 2);  // Expected call.
}

TEST_F(GMockOutputTest, ExcessiveCallWithDefaultAction) {
  ON_CALL(foo_, Bar2(_, _))
      .WillByDefault(Return(true));   // Default action #1
  ON_CALL(foo_, Bar2(1, _))
      .WillByDefault(Return(false));  // Default action #2

  EXPECT_CALL(foo_, Bar2(2, 2));
  EXPECT_CALL(foo_, Bar2(1, 1));

  foo_.Bar2(2, 2);  // Expected call.
  foo_.Bar2(2, 2);  // Excessive call, takes default action #1.
  foo_.Bar2(1, 1);  // Expected call.
  foo_.Bar2(1, 1);  // Excessive call, takes default action #2.
}

TEST_F(GMockOutputTest, UninterestingCallWithDefaultAction) {
  ON_CALL(foo_, Bar2(_, _))
      .WillByDefault(Return(true));   // Default action #1
  ON_CALL(foo_, Bar2(1, _))
      .WillByDefault(Return(false));  // Default action #2

  foo_.Bar2(2, 2);  // Uninteresting call, takes default action #1.
  foo_.Bar2(1, 1);  // Uninteresting call, takes default action #2.
}

TEST_F(GMockOutputTest, ExplicitActionsRunOutWithDefaultAction) {
  ON_CALL(foo_, Bar2(_, _))
      .WillByDefault(Return(true));   // Default action #1

  EXPECT_CALL(foo_, Bar2(_, _))
      .Times(2)
      .WillOnce(Return(false));
  foo_.Bar2(2, 2);
  foo_.Bar2(1, 1);  // Explicit actions in EXPECT_CALL run out.
}

TEST_F(GMockOutputTest, CatchesLeakedMocks) {
  MockFoo* foo1 = new MockFoo;
  MockFoo* foo2 = new MockFoo;

  // Invokes ON_CALL on foo1.
  ON_CALL(*foo1, Bar(_, _, _)).WillByDefault(Return('a'));

  // Invokes EXPECT_CALL on foo2.
  EXPECT_CALL(*foo2, Bar2(_, _));
  EXPECT_CALL(*foo2, Bar2(1, _));
  EXPECT_CALL(*foo2, Bar3(_, _)).Times(AnyNumber());
  foo2->Bar2(2, 1);
  foo2->Bar2(1, 1);

  // Both foo1 and foo2 are deliberately leaked.
}

void TestCatchesLeakedMocksInAdHocTests() {
  MockFoo* foo = new MockFoo;

  // Invokes EXPECT_CALL on foo.
  EXPECT_CALL(*foo, Bar2(_, _));
  foo->Bar2(2, 1);

  // foo is deliberately leaked.
}

int main(int argc, char **argv) {
  testing::InitGoogleMock(&argc, argv);

  // Ensures that the tests pass no matter what value of
  // --gmock_catch_leaked_mocks and --gmock_verbose the user specifies.
  testing::GMOCK_FLAG(catch_leaked_mocks) = true;
  testing::GMOCK_FLAG(verbose) = "warning";

  TestCatchesLeakedMocksInAdHocTests();
  return RUN_ALL_TESTS();
}