src/testcases/ConditionTest.cpp

#include "ConditionTest.h"

#include <iostream>

CPPUNIT_TEST_SUITE_REGISTRATION(ConditionTest);


// ConditionChecker

ConditionTest::ConditionChecker::ConditionChecker(bool waitFor) : Thread(false, 0, -4) {
    resource = 0;
    this->waitFor = waitFor;
}

int ConditionTest::ConditionChecker::Main() {
    condition.WaitAndUnlockIf(!waitFor);
    resource++;
}


// ConditionSetter

ConditionTest::ConditionSetter::ConditionSetter(Condition* condition, bool toSet) : Thread(false, 0, -4) {
    resource = 0;
    this->toSet = toSet;
    this->condition = condition;
}

int ConditionTest::ConditionSetter::Main() {
    condition->Set(toSet);
    resource++;
}


// ConditionCheckerLocking

Condition ConditionTest::ConditionCheckerLocking::staticcondition; // we sheare the same Condition object between all instances of ConditionCheckerLocking

ConditionTest::ConditionCheckerLocking::ConditionCheckerLocking(bool waitFor) : ConditionChecker(waitFor) {
    doUnlock = false;
}

int ConditionTest::ConditionCheckerLocking::Main() {
    staticcondition.WaitIf(!waitFor);
    resource++;
    while (!doUnlock) usleep(1000); // sleep until ordered to unlock the condition again
    staticcondition.Unlock();
}


// ConditionTest

void ConditionTest::setUp() {
}

void ConditionTest::tearDown() {
}


// Check if Condition class doesn't block if desired condition is already reached
void ConditionTest::testDoesntBlockOnDesiredCondtion() {
    ConditionChecker t(false);
    t.SignalStartThread();
    usleep(200000); // wait 200ms
    CPPUNIT_ASSERT(t.resource == 1);
}

// Check if Condition class blocks if desired condition is not alredy reached
void ConditionTest::testBlocksIfNotDesiredCondition() {
    ConditionChecker t(true);
    t.SignalStartThread();
    usleep(400000); // wait 400ms
    CPPUNIT_ASSERT(t.resource == 0);
}

// Check if Condition class blocks until desired condition is reached
void ConditionTest::testBlocksUntilDesiredCondition() {
    ConditionChecker checker(true); // let that thread wait until condition equals 'true'
    ConditionSetter  setter(&checker.condition, true); // let this thread set the condition to 'true'
    checker.SignalStartThread();
    usleep(50000); // wait 50ms
    CPPUNIT_ASSERT(checker.resource == 0); // check if 'checker' thread has not passed the WaitAndUnlockIf() point yet
    setter.SignalStartThread();
    usleep(100000); // wait 100ms
    CPPUNIT_ASSERT(checker.resource == 1); // check if 'checker' thread passed the WaitAndUnlockIf() point
}

// Check if the WaitIf() call blocks concurrent threads until the first WaitIf() caller calls Unlock()
void ConditionTest::testWaitIFBlocksConcurrentThread() {
    // if the following three tests fail, then it doesn't make sense to continue with the actual one here
    testDoesntBlockOnDesiredCondtion();
    testBlocksIfNotDesiredCondition();
    testBlocksUntilDesiredCondition();

    // actual new test
    ConditionCheckerLocking checker1(false);
    ConditionCheckerLocking checker2(false);
    checker1.SignalStartThread();
    usleep(200000); // wait 200ms
    CPPUNIT_ASSERT(checker1.resource == 1);
    checker2.SignalStartThread();
    usleep(200000); // wait 200ms
    CPPUNIT_ASSERT(checker2.resource == 0); // check if condition locked by 'checker1'

    // now order 'checker1' thread to Unlock() the condition again
    checker1.doUnlock = true;
    usleep(200000); // wait 200ms
    CPPUNIT_ASSERT(checker2.resource == 1); // check if condition was unlocked by 'checker1'
}
1	#include "ConditionTest.h"
2
3	#include <iostream>
4
5	CPPUNIT_TEST_SUITE_REGISTRATION(ConditionTest);
6
7
8	// ConditionChecker
9
10	ConditionTest::ConditionChecker::ConditionChecker(bool waitFor) : Thread(false, 0, -4) {
11	resource = 0;
12	this->waitFor = waitFor;
13	}
14
15	int ConditionTest::ConditionChecker::Main() {
16	condition.WaitAndUnlockIf(!waitFor);
17	resource++;
18	}
19
20
21	// ConditionSetter
22
23	ConditionTest::ConditionSetter::ConditionSetter(Condition* condition, bool toSet) : Thread(false, 0, -4) {
24	resource = 0;
25	this->toSet = toSet;
26	this->condition = condition;
27	}
28
29	int ConditionTest::ConditionSetter::Main() {
30	condition->Set(toSet);
31	resource++;
32	}
33
34
35	// ConditionCheckerLocking
36
37	Condition ConditionTest::ConditionCheckerLocking::staticcondition; // we sheare the same Condition object between all instances of ConditionCheckerLocking
38
39	ConditionTest::ConditionCheckerLocking::ConditionCheckerLocking(bool waitFor) : ConditionChecker(waitFor) {
40	doUnlock = false;
41	}
42
43	int ConditionTest::ConditionCheckerLocking::Main() {
44	staticcondition.WaitIf(!waitFor);
45	resource++;
46	while (!doUnlock) usleep(1000); // sleep until ordered to unlock the condition again
47	staticcondition.Unlock();
48	}
49
50
51	// ConditionTest
52
53	void ConditionTest::setUp() {
54	}
55
56	void ConditionTest::tearDown() {
57	}
58
59
60	// Check if Condition class doesn't block if desired condition is already reached
61	void ConditionTest::testDoesntBlockOnDesiredCondtion() {
62	ConditionChecker t(false);
63	t.SignalStartThread();
64	usleep(200000); // wait 200ms
65	CPPUNIT_ASSERT(t.resource == 1);
66	}
67
68	// Check if Condition class blocks if desired condition is not alredy reached
69	void ConditionTest::testBlocksIfNotDesiredCondition() {
70	ConditionChecker t(true);
71	t.SignalStartThread();
72	usleep(400000); // wait 400ms
73	CPPUNIT_ASSERT(t.resource == 0);
74	}
75
76	// Check if Condition class blocks until desired condition is reached
77	void ConditionTest::testBlocksUntilDesiredCondition() {
78	ConditionChecker checker(true); // let that thread wait until condition equals 'true'
79	ConditionSetter setter(&checker.condition, true); // let this thread set the condition to 'true'
80	checker.SignalStartThread();
81	usleep(50000); // wait 50ms
82	CPPUNIT_ASSERT(checker.resource == 0); // check if 'checker' thread has not passed the WaitAndUnlockIf() point yet
83	setter.SignalStartThread();
84	usleep(100000); // wait 100ms
85	CPPUNIT_ASSERT(checker.resource == 1); // check if 'checker' thread passed the WaitAndUnlockIf() point
86	}
87
88	// Check if the WaitIf() call blocks concurrent threads until the first WaitIf() caller calls Unlock()
89	void ConditionTest::testWaitIFBlocksConcurrentThread() {
90	// if the following three tests fail, then it doesn't make sense to continue with the actual one here
91	testDoesntBlockOnDesiredCondtion();
92	testBlocksIfNotDesiredCondition();
93	testBlocksUntilDesiredCondition();
94
95	// actual new test
96	ConditionCheckerLocking checker1(false);
97	ConditionCheckerLocking checker2(false);
98	checker1.SignalStartThread();
99	usleep(200000); // wait 200ms
100	CPPUNIT_ASSERT(checker1.resource == 1);
101	checker2.SignalStartThread();
102	usleep(200000); // wait 200ms
103	CPPUNIT_ASSERT(checker2.resource == 0); // check if condition locked by 'checker1'
104
105	// now order 'checker1' thread to Unlock() the condition again
106	checker1.doUnlock = true;
107	usleep(200000); // wait 200ms
108	CPPUNIT_ASSERT(checker2.resource == 1); // check if condition was unlocked by 'checker1'
109	}