michael@0: // Copyright 2008 Google Inc.
michael@0: // All Rights Reserved.
michael@0: //
michael@0: // Redistribution and use in source and binary forms, with or without
michael@0: // modification, are permitted provided that the following conditions are
michael@0: // met:
michael@0: //
michael@0: //     * Redistributions of source code must retain the above copyright
michael@0: // notice, this list of conditions and the following disclaimer.
michael@0: //     * Redistributions in binary form must reproduce the above
michael@0: // copyright notice, this list of conditions and the following disclaimer
michael@0: // in the documentation and/or other materials provided with the
michael@0: // distribution.
michael@0: //     * Neither the name of Google Inc. nor the names of its
michael@0: // contributors may be used to endorse or promote products derived from
michael@0: // this software without specific prior written permission.
michael@0: //
michael@0: // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
michael@0: // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
michael@0: // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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michael@0: // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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michael@0: // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
michael@0: // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
michael@0: // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
michael@0: //
michael@0: // Author: vladl@google.com (Vlad Losev)
michael@0: 
michael@0: // This sample shows how to test common properties of multiple
michael@0: // implementations of an interface (aka interface tests) using
michael@0: // value-parameterized tests. Each test in the test case has
michael@0: // a parameter that is an interface pointer to an implementation
michael@0: // tested.
michael@0: 
michael@0: // The interface and its implementations are in this header.
michael@0: #include "prime_tables.h"
michael@0: 
michael@0: #include "gtest/gtest.h"
michael@0: 
michael@0: #if GTEST_HAS_PARAM_TEST
michael@0: 
michael@0: using ::testing::TestWithParam;
michael@0: using ::testing::Values;
michael@0: 
michael@0: // As a general rule, to prevent a test from affecting the tests that come
michael@0: // after it, you should create and destroy the tested objects for each test
michael@0: // instead of reusing them.  In this sample we will define a simple factory
michael@0: // function for PrimeTable objects.  We will instantiate objects in test's
michael@0: // SetUp() method and delete them in TearDown() method.
michael@0: typedef PrimeTable* CreatePrimeTableFunc();
michael@0: 
michael@0: PrimeTable* CreateOnTheFlyPrimeTable() {
michael@0:   return new OnTheFlyPrimeTable();
michael@0: }
michael@0: 
michael@0: template <size_t max_precalculated>
michael@0: PrimeTable* CreatePreCalculatedPrimeTable() {
michael@0:   return new PreCalculatedPrimeTable(max_precalculated);
michael@0: }
michael@0: 
michael@0: // Inside the test body, fixture constructor, SetUp(), and TearDown() you
michael@0: // can refer to the test parameter by GetParam().  In this case, the test
michael@0: // parameter is a factory function which we call in fixture's SetUp() to
michael@0: // create and store an instance of PrimeTable.
michael@0: class PrimeTableTest : public TestWithParam<CreatePrimeTableFunc*> {
michael@0:  public:
michael@0:   virtual ~PrimeTableTest() { delete table_; }
michael@0:   virtual void SetUp() { table_ = (*GetParam())(); }
michael@0:   virtual void TearDown() {
michael@0:     delete table_;
michael@0:     table_ = NULL;
michael@0:   }
michael@0: 
michael@0:  protected:
michael@0:   PrimeTable* table_;
michael@0: };
michael@0: 
michael@0: TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) {
michael@0:   EXPECT_FALSE(table_->IsPrime(-5));
michael@0:   EXPECT_FALSE(table_->IsPrime(0));
michael@0:   EXPECT_FALSE(table_->IsPrime(1));
michael@0:   EXPECT_FALSE(table_->IsPrime(4));
michael@0:   EXPECT_FALSE(table_->IsPrime(6));
michael@0:   EXPECT_FALSE(table_->IsPrime(100));
michael@0: }
michael@0: 
michael@0: TEST_P(PrimeTableTest, ReturnsTrueForPrimes) {
michael@0:   EXPECT_TRUE(table_->IsPrime(2));
michael@0:   EXPECT_TRUE(table_->IsPrime(3));
michael@0:   EXPECT_TRUE(table_->IsPrime(5));
michael@0:   EXPECT_TRUE(table_->IsPrime(7));
michael@0:   EXPECT_TRUE(table_->IsPrime(11));
michael@0:   EXPECT_TRUE(table_->IsPrime(131));
michael@0: }
michael@0: 
michael@0: TEST_P(PrimeTableTest, CanGetNextPrime) {
michael@0:   EXPECT_EQ(2, table_->GetNextPrime(0));
michael@0:   EXPECT_EQ(3, table_->GetNextPrime(2));
michael@0:   EXPECT_EQ(5, table_->GetNextPrime(3));
michael@0:   EXPECT_EQ(7, table_->GetNextPrime(5));
michael@0:   EXPECT_EQ(11, table_->GetNextPrime(7));
michael@0:   EXPECT_EQ(131, table_->GetNextPrime(128));
michael@0: }
michael@0: 
michael@0: // In order to run value-parameterized tests, you need to instantiate them,
michael@0: // or bind them to a list of values which will be used as test parameters.
michael@0: // You can instantiate them in a different translation module, or even
michael@0: // instantiate them several times.
michael@0: //
michael@0: // Here, we instantiate our tests with a list of two PrimeTable object
michael@0: // factory functions:
michael@0: INSTANTIATE_TEST_CASE_P(
michael@0:     OnTheFlyAndPreCalculated,
michael@0:     PrimeTableTest,
michael@0:     Values(&CreateOnTheFlyPrimeTable, &CreatePreCalculatedPrimeTable<1000>));
michael@0: 
michael@0: #else
michael@0: 
michael@0: // Google Test may not support value-parameterized tests with some
michael@0: // compilers. If we use conditional compilation to compile out all
michael@0: // code referring to the gtest_main library, MSVC linker will not link
michael@0: // that library at all and consequently complain about missing entry
michael@0: // point defined in that library (fatal error LNK1561: entry point
michael@0: // must be defined). This dummy test keeps gtest_main linked in.
michael@0: TEST(DummyTest, ValueParameterizedTestsAreNotSupportedOnThisPlatform) {}
michael@0: 
michael@0: #endif  // GTEST_HAS_PARAM_TEST