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