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Diffstat (limited to 'src/unittest/refcnttest.cc')
| -rw-r--r-- | src/unittest/refcnttest.cc | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/src/unittest/refcnttest.cc b/src/unittest/refcnttest.cc new file mode 100644 index 000000000..e7dfd3693 --- /dev/null +++ b/src/unittest/refcnttest.cc @@ -0,0 +1,187 @@ +/* + * Copyright (c) 2010 The Regents of The University of Michigan + * 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 the copyright holders 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. + * + * Authors: Gabe Black + */ + +#include <cassert> +#include <iostream> +#include <list> + +#include "base/refcnt.hh" + +using namespace std; + +namespace { + +class TestRC; +typedef list<TestRC *> LiveList; +LiveList liveList; + +int +live() +{ + return liveList.size(); +} + +int +liveChange() +{ + static int oldLive = 0; + int newLive = live(); + int diff = newLive - oldLive; + oldLive = newLive; + return diff; +} + +class TestRC : public RefCounted +{ + protected: + const char *_tag; + LiveList::iterator liveIt; + + public: + TestRC(const char *newTag) : _tag(newTag) + { + cout << " Creating object \"" << _tag << "\"\n"; + liveList.push_front(this); + liveIt = liveList.begin(); + } + + ~TestRC() + { + cout << " Destroying object \"" << _tag << "\"\n"; + liveList.erase(liveIt); + } + + const char * + tag() + { + return _tag; + } + + int testVal; +}; + +typedef RefCountingPtr<TestRC> Ptr; + +} + +int +main() +{ + assert(live() == 0); + assert(liveChange() == 0); + + // Create an empty Ptr and verify it's data pointer is NULL. + cout << "NULL check.\n"; + Ptr nullCheck; + assert(nullCheck.get() == NULL); + + assert(liveChange() == 0); + + // Construct a Ptr from a TestRC pointer. + cout << "Construction from pointer.\n"; + Ptr constFromPointer = new TestRC("construction from pointer"); + + assert(liveChange() == 1); + + // Construct a Ptr from an existing Ptr. + cout << "Construction from a Ptr.\n"; + Ptr constFromPtr = constFromPointer; + + assert(liveChange() == 0); + + // Test a Ptr being destroyed. + cout << "Destroying a Ptr.\n"; + Ptr *ptrPtr = new Ptr(new TestRC("destroying a ptr")); + assert(liveChange() == 1); + delete ptrPtr; + assert(liveChange() == -1); + + // Test assignment from a pointer and from a Ptr. + cout << "Assignment operators.\n"; + Ptr assignmentTarget; + TestRC *assignmentSourcePointer = new TestRC("assignment source 1"); + assert(liveChange() == 1); + assignmentTarget = assignmentSourcePointer; + assert(liveChange() == 0); + assignmentTarget = NULL; + assert(liveChange() == -1); + Ptr assignmentSourcePtr(new TestRC("assignment source 2")); + assert(liveChange() == 1); + assignmentTarget = assignmentSourcePtr; + assert(liveChange() == 0); + assignmentSourcePtr = NULL; + assert(liveChange() == 0); + assignmentTarget = NULL; + assert(liveChange() == -1); + + // Test access to members of the pointed to class and dereferencing. + cout << "Access to members.\n"; + TestRC *accessTest = new TestRC("access test"); + Ptr accessTestPtr = accessTest; + accessTest->testVal = 1; + assert(accessTestPtr->testVal == 1); + assert((*accessTestPtr).testVal == 1); + accessTest->testVal = 2; + assert(accessTestPtr->testVal == 2); + assert((*accessTestPtr).testVal == 2); + accessTestPtr->testVal = 3; + assert(accessTest->testVal == 3); + (*accessTestPtr).testVal = 4; + assert(accessTest->testVal == 4); + accessTestPtr = NULL; + accessTest = NULL; + assert(liveChange() == 0); + + // Test bool and ! operator overloads. + cout << "Conversion to bool and ! overload.\n"; + Ptr boolTest = new TestRC("bool test"); + assert(boolTest == true); + assert(!boolTest == false); + boolTest = NULL; + assert(boolTest == false); + assert(!boolTest == true); + assert(liveChange() == 0); + + // Test the equality operators. + cout << "Equality operators.\n"; + TestRC *equalTestA = new TestRC("equal test a"); + Ptr equalTestAPtr = equalTestA; + Ptr equalTestAPtr2 = equalTestA; + TestRC *equalTestB = new TestRC("equal test b"); + Ptr equalTestBPtr = equalTestB; + assert(equalTestA == equalTestAPtr); + assert(equalTestAPtr == equalTestA); + assert(equalTestAPtr == equalTestAPtr2); + assert(equalTestA != equalTestBPtr); + assert(equalTestAPtr != equalTestB); + assert(equalTestAPtr != equalTestBPtr); + + cout << flush; +} |