Subversion Repositories s80186

// Copyright 2008 Google Inc.

// All Rights Reserved.

//

// Redistribution and use in source and binary forms, with or without

// modification, are permitted provided that the following conditions are

// met:

//

//     * Redistributions of source code must retain the above copyright

// notice, this list of conditions and the following disclaimer.

//     * Redistributions in binary form must reproduce the above

// copyright notice, this list of conditions and the following disclaimer

// in the documentation and/or other materials provided with the

// distribution.

//     * Neither the name of Google Inc. nor the names of its

// contributors may be used to endorse or promote products derived from

// this software without specific prior written permission.

//

// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

//

// Author: vladl@google.com (Vlad Losev)

// This sample shows how to test common properties of multiple

// implementations of an interface (aka interface tests) using

// value-parameterized tests. Each test in the test case has

// a parameter that is an interface pointer to an implementation

// tested.

// The interface and its implementations are in this header.

#include "prime_tables.h"

#include "gtest/gtest.h"

#if GTEST_HAS_PARAM_TEST

using ::testing::TestWithParam;

using ::testing::Values;

// As a general rule, to prevent a test from affecting the tests that come

// after it, you should create and destroy the tested objects for each test

// instead of reusing them.  In this sample we will define a simple factory

// function for PrimeTable objects.  We will instantiate objects in test's

// SetUp() method and delete them in TearDown() method.

typedef PrimeTable* CreatePrimeTableFunc();

PrimeTable* CreateOnTheFlyPrimeTable() {

  return new OnTheFlyPrimeTable();

}

template <size_t max_precalculated>

PrimeTable* CreatePreCalculatedPrimeTable() {

  return new PreCalculatedPrimeTable(max_precalculated);

}

// Inside the test body, fixture constructor, SetUp(), and TearDown() you

// can refer to the test parameter by GetParam().  In this case, the test

// parameter is a factory function which we call in fixture's SetUp() to

// create and store an instance of PrimeTable.

class PrimeTableTest : public TestWithParam<CreatePrimeTableFunc*> {

 public:

  virtual ~PrimeTableTest() { delete table_; }

  virtual void SetUp() { table_ = (*GetParam())(); }

  virtual void TearDown() {

    delete table_;

    table_ = NULL;

  }

 protected:

  PrimeTable* table_;

};

TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) {

  EXPECT_FALSE(table_->IsPrime(-5));

  EXPECT_FALSE(table_->IsPrime(0));

  EXPECT_FALSE(table_->IsPrime(1));

  EXPECT_FALSE(table_->IsPrime(4));

  EXPECT_FALSE(table_->IsPrime(6));

  EXPECT_FALSE(table_->IsPrime(100));

}

TEST_P(PrimeTableTest, ReturnsTrueForPrimes) {

  EXPECT_TRUE(table_->IsPrime(2));

  EXPECT_TRUE(table_->IsPrime(3));

  EXPECT_TRUE(table_->IsPrime(5));

  EXPECT_TRUE(table_->IsPrime(7));

  EXPECT_TRUE(table_->IsPrime(11));

  EXPECT_TRUE(table_->IsPrime(131));

}

TEST_P(PrimeTableTest, CanGetNextPrime) {

  EXPECT_EQ(2, table_->GetNextPrime(0));

  EXPECT_EQ(3, table_->GetNextPrime(2));

  EXPECT_EQ(5, table_->GetNextPrime(3));

  EXPECT_EQ(7, table_->GetNextPrime(5));

  EXPECT_EQ(11, table_->GetNextPrime(7));

  EXPECT_EQ(131, table_->GetNextPrime(128));

}

// In order to run value-parameterized tests, you need to instantiate them,

// or bind them to a list of values which will be used as test parameters.

// You can instantiate them in a different translation module, or even

// instantiate them several times.

//

// Here, we instantiate our tests with a list of two PrimeTable object

// factory functions:

INSTANTIATE_TEST_CASE_P(

    OnTheFlyAndPreCalculated,

    PrimeTableTest,

    Values(&CreateOnTheFlyPrimeTable, &CreatePreCalculatedPrimeTable<1000>));

#else

// Google Test may not support value-parameterized tests with some

// compilers. If we use conditional compilation to compile out all

// code referring to the gtest_main library, MSVC linker will not link

// that library at all and consequently complain about missing entry

// point defined in that library (fatal error LNK1561: entry point

// must be defined). This dummy test keeps gtest_main linked in.

TEST(DummyTest, ValueParameterizedTestsAreNotSupportedOnThisPlatform) {}

#endif  // GTEST_HAS_PARAM_TEST