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sample7_unittest.cc
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R9484 sp4e-homework-lars-bertil
sample7_unittest.cc
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// 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.
// 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"
namespace
{
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
PrimeTableTestSmpl7
:
public
TestWithParam
<
CreatePrimeTableFunc
*>
{
public
:
virtual
~
PrimeTableTestSmpl7
()
{
delete
table_
;
}
virtual
void
SetUp
()
{
table_
=
(
*
GetParam
())();
}
virtual
void
TearDown
()
{
delete
table_
;
table_
=
NULL
;
}
protected
:
PrimeTable
*
table_
;
};
TEST_P
(
PrimeTableTestSmpl7
,
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
(
PrimeTableTestSmpl7
,
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
(
PrimeTableTestSmpl7
,
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
,
PrimeTableTestSmpl7
,
Values
(
&
CreateOnTheFlyPrimeTable
,
&
CreatePreCalculatedPrimeTable
<
1000
>
));
}
// namespace
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