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media/webrtc/trunk/testing/gtest/samples/sample8_unittest.cc@4ab42b5ab56c (annotated)

media/webrtc/trunk/testing/gtest/samples/sample8_unittest.cc

Wed, 31 Dec 2014 07:53:36 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:53:36 +0100
branch: TOR_BUG_3246
changeset 5: 4ab42b5ab56c
permissions: -rw-r--r--

Correct small whitespace inconsistency, lost while renaming variables.

 // 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 code relying on some global flag variables.
 // Combine() helps with generating all possible combinations of such flags,
 // and each test is given one combination as a parameter.
 // Use class definitions to test from this header.
 #include "prime_tables.h"
 #include "gtest/gtest.h"
 #if GTEST_HAS_COMBINE
 // Suppose we want to introduce a new, improved implementation of PrimeTable
 // which combines speed of PrecalcPrimeTable and versatility of
 // OnTheFlyPrimeTable (see prime_tables.h). Inside it instantiates both
 // PrecalcPrimeTable and OnTheFlyPrimeTable and uses the one that is more
 // appropriate under the circumstances. But in low memory conditions, it can be
 // told to instantiate without PrecalcPrimeTable instance at all and use only
 // OnTheFlyPrimeTable.
 class HybridPrimeTable : public PrimeTable {
  public:
   HybridPrimeTable(bool force_on_the_fly, int max_precalculated)
       : on_the_fly_impl_(new OnTheFlyPrimeTable),
         precalc_impl_(force_on_the_fly ? NULL :
                           new PreCalculatedPrimeTable(max_precalculated)),
         max_precalculated_(max_precalculated) {}
   virtual ~HybridPrimeTable() {
     delete on_the_fly_impl_;
     delete precalc_impl_;
   }
   virtual bool IsPrime(int n) const {
     if (precalc_impl_ != NULL && n < max_precalculated_)
       return precalc_impl_->IsPrime(n);
     else
       return on_the_fly_impl_->IsPrime(n);
   }
   virtual int GetNextPrime(int p) const {
     int next_prime = -1;
     if (precalc_impl_ != NULL && p < max_precalculated_)
       next_prime = precalc_impl_->GetNextPrime(p);
     return next_prime != -1 ? next_prime : on_the_fly_impl_->GetNextPrime(p);
   }
  private:
   OnTheFlyPrimeTable* on_the_fly_impl_;
   PreCalculatedPrimeTable* precalc_impl_;
   int max_precalculated_;
 };
 using ::testing::TestWithParam;
 using ::testing::Bool;
 using ::testing::Values;
 using ::testing::Combine;
 // To test all code paths for HybridPrimeTable we must test it with numbers
 // both within and outside PreCalculatedPrimeTable's capacity and also with
 // PreCalculatedPrimeTable disabled. We do this by defining fixture which will
 // accept different combinations of parameters for instantiating a
 // HybridPrimeTable instance.
 class PrimeTableTest : public TestWithParam< ::std::tr1::tuple<bool, int> > {
  protected:
   virtual void SetUp() {
     // This can be written as
     //
     // bool force_on_the_fly;
     // int max_precalculated;
     // tie(force_on_the_fly, max_precalculated) = GetParam();
     //
     // once the Google C++ Style Guide allows use of ::std::tr1::tie.
     //
     bool force_on_the_fly = ::std::tr1::get<0>(GetParam());
     int max_precalculated = ::std::tr1::get<1>(GetParam());
     table_ = new HybridPrimeTable(force_on_the_fly, max_precalculated);
   }
   virtual void TearDown() {
     delete table_;
     table_ = NULL;
   }
   HybridPrimeTable* table_;
 };
 TEST_P(PrimeTableTest, ReturnsFalseForNonPrimes) {
   // Inside the test body, you can refer to the test parameter by GetParam().
   // In this case, the test parameter is a PrimeTable interface pointer which
   // we can use directly.
   // Please note that you can also save it in the fixture's SetUp() method
   // or constructor and use saved copy in the tests.
   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 parameters. We must combine
 // all variations of the boolean flag suppressing PrecalcPrimeTable and some
 // meaningful values for tests. We choose a small value (1), and a value that
 // will put some of the tested numbers beyond the capability of the
 // PrecalcPrimeTable instance and some inside it (10). Combine will produce all
 // possible combinations.
 INSTANTIATE_TEST_CASE_P(MeaningfulTestParameters,
                         PrimeTableTest,
                         Combine(Bool(), Values(1, 10)));
 #else
 // Google Test may not support Combine() 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, CombineIsNotSupportedOnThisPlatform) {}
 #endif  // GTEST_HAS_COMBINE

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