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sample3_unittest.cc
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// Copyright 2005, 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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// A sample program demonstrating using Google C++ testing framework.
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//
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// Author: wan@google.com (Zhanyong Wan)
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// In this example, we use a more advanced feature of Google Test called
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// test fixture.
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//
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// A test fixture is a place to hold objects and functions shared by
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// all tests in a test case. Using a test fixture avoids duplicating
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// the test code necessary to initialize and cleanup those common
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// objects for each test. It is also useful for defining sub-routines
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// that your tests need to invoke a lot.
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//
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// <TechnicalDetails>
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//
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// The tests share the test fixture in the sense of code sharing, not
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// data sharing. Each test is given its own fresh copy of the
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// fixture. You cannot expect the data modified by one test to be
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// passed on to another test, which is a bad idea.
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//
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// The reason for this design is that tests should be independent and
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// repeatable. In particular, a test should not fail as the result of
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// another test's failure. If one test depends on info produced by
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// another test, then the two tests should really be one big test.
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//
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// The macros for indicating the success/failure of a test
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// (EXPECT_TRUE, FAIL, etc) need to know what the current test is
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// (when Google Test prints the test result, it tells you which test
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// each failure belongs to). Technically, these macros invoke a
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// member function of the Test class. Therefore, you cannot use them
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// in a global function. That's why you should put test sub-routines
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// in a test fixture.
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//
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// </TechnicalDetails>
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#include "
sample3-inl.h
"
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#include "
gtest/gtest.h
"
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// To use a test fixture, derive a class from testing::Test.
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class
QueueTest
:
public
testing::Test
{
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protected
:
// You should make the members protected s.t. they can be
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// accessed from sub-classes.
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// virtual void SetUp() will be called before each test is run. You
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// should define it if you need to initialize the varaibles.
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// Otherwise, this can be skipped.
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virtual
void
SetUp
() {
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q1_
.
Enqueue
(1);
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q2_
.
Enqueue
(2);
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q2_
.
Enqueue
(3);
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}
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// virtual void TearDown() will be called after each test is run.
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// You should define it if there is cleanup work to do. Otherwise,
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// you don't have to provide it.
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//
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// virtual void TearDown() {
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// }
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// A helper function that some test uses.
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static
int
Double
(
int
n
) {
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return
2*
n
;
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}
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// A helper function for testing Queue::Map().
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void
MapTester
(
const
Queue<int>
* q) {
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// Creates a new queue, where each element is twice as big as the
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// corresponding one in q.
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const
Queue<int>
*
const
new_q = q->
Map
(
Double
);
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// Verifies that the new queue has the same size as q.
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ASSERT_EQ
(q->
Size
(), new_q->
Size
());
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// Verifies the relationship between the elements of the two queues.
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for
(
const
QueueNode<int>
* n1 = q->
Head
(), * n2 = new_q->
Head
();
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n1 != NULL; n1 = n1->
next
(), n2 = n2->
next
() ) {
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EXPECT_EQ
(2 * n1->element(), n2->element());
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}
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delete
new_q;
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}
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// Declares the variables your tests want to use.
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Queue<int>
q0_
;
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Queue<int>
q1_
;
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Queue<int>
q2_
;
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};
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// When you have a test fixture, you define a test using TEST_F
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// instead of TEST.
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// Tests the default c'tor.
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TEST_F
(
QueueTest
, DefaultConstructor) {
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// You can access data in the test fixture here.
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EXPECT_EQ
(0
u
, q0_.Size());
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}
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// Tests Dequeue().
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TEST_F
(
QueueTest
, Dequeue) {
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int
*
n
= q0_.Dequeue();
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EXPECT_TRUE
(n == NULL);
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n = q1_.Dequeue();
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ASSERT_TRUE
(n != NULL);
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EXPECT_EQ
(1, *n);
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EXPECT_EQ
(0
u
, q1_.Size());
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delete
n
;
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n = q2_.Dequeue();
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ASSERT_TRUE
(n != NULL);
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EXPECT_EQ
(2, *n);
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EXPECT_EQ
(1
u
, q2_.Size());
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delete
n
;
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}
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// Tests the Queue::Map() function.
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TEST_F
(
QueueTest
, Map) {
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MapTester(&q0_);
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MapTester(&q1_);
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MapTester(&q2_);
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}
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sample3_unittest.cc
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