gtest_gtest测试静态函数

sudo apt-get install libgtest-dev
cd /usr/src/gtest
sudo cmake .
sudo make
sudo mv libg* /usr/lib/

g++ -c sample.cpp
g++ -c test.cpp
g++ test.o sample.o -lgtest -o test -lpthread

ASSERT_EQ(x.size(), y.size()) << "Vectors x and y are of unequal length";

for (int i = 0; i < x.size(); ++i) {
  EXPECT_EQ(x[i], y[i]) << "Vectors x and y differ at index " << i;
}

// Returns true iff m and n have no common divisors except 1.
bool MutuallyPrime(int m, int n) { ... }
const int a = 3;
const int b = 4;
const int c = 10;
//EXPECT_PRED2(MutuallyPrime, a, b) succeed
//EXPECT_PRED2(MutuallyPrime, b, c) fail

Test(test_case_name, test_name) {
... test body ...
}

template <typename E> // E is the element type.
class Queue {
 public:
  Queue();
  void Enqueue(const E& element);
  E* Dequeue(); // Returns NULL if the queue is empty.
  size_t size() const;
  ...
};

class QueueTest : public ::testing::Test {
 protected:
  virtual void SetUp() {
    q1_.Enqueue(1);
    q2_.Enqueue(2);
    q2_.Enqueue(3);
  }

  // virtual void TearDown() {}

  Queue<int> q0_;
  Queue<int> q1_;
  Queue<int> q2_;
};
TEST_F(QueueTest, IsEmptyInitially) {
  EXPECT_EQ(0, q0_.size());
}

TEST_F(QueueTest, DequeueWorks) {
  int* n = q0_.Dequeue();
  EXPECT_EQ(NULL, n);

  n = q1_.Dequeue();
  ASSERT_TRUE(n != NULL);
  EXPECT_EQ(1, *n);
  EXPECT_EQ(0, q1_.size());
  delete n;

  n = q2_.Dequeue();
  ASSERT_TRUE(n != NULL);
  EXPECT_EQ(2, *n);
  EXPECT_EQ(1, q2_.size());
  delete n;
}

int main(int argc, char **argv) {
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}

class FooTest : public ::testing::Test {
 protected:
  // Per-test-case set-up.
  // Called before the first test in this test case.
  // Can be omitted if not needed.
  static void SetUpTestCase() {
    shared_resource_ = new ...;
  }

  // Per-test-case tear-down.
  // Called after the last test in this test case.
  // Can be omitted if not needed.
  static void TearDownTestCase() {
    delete shared_resource_;
    shared_resource_ = NULL;
  }

  // You can define per-test set-up and tear-down logic as usual.
  virtual void SetUp() { ... }
  virtual void TearDown() { ... }

  // Some expensive resource shared by all tests.
  static T* shared_resource_;
};

T* FooTest::shared_resource_ = NULL;

TEST_F(FooTest, Test1) {
  ... you can refer to shared_resource here ...
}
TEST_F(FooTest, Test2) {
  ... you can refer to shared_resource here ...
}

class FooTest : public ::testing::TestWithParam<const char*> {
  // You can implement all the usual fixture class members here.
  // To access the test parameter, call GetParam() from class
  // TestWithParam<T>.
};

// Or, when you want to add parameters to a pre-existing fixture class:
class BaseTest : public ::testing::Test {
  ...
};
class BarTest : public BaseTest,
                public ::testing::WithParamInterface<const char*> {
  ...
};
TEST_P(FooTest, DoesBlah) {
  // Inside a test, access the test parameter with the GetParam() method
  // of the TestWithParam<T> class:
  EXPECT_TRUE(foo.Blah(GetParam()));
  ...
}

TEST_P(FooTest, HasBlahBlah) {
  ...
}
INSTANTIATE_TEST_CASE_P(InstantiationName,
                        FooTest,
                        ::testing::Values("meeny", "miny", "moe"));