JUnit test and Project 3 simulation. 2 JUnit The testing problems The framework of JUnit A case...
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JUnit test and Project 3 simulation
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Transcript of JUnit test and Project 3 simulation. 2 JUnit The testing problems The framework of JUnit A case...
JUnit test and Project 3 simulation
2
JUnit
The testing problemsThe framework of JUnitA case study
Acknowledgement: using some materials from JUNIT tutorial by Hong Qing Yu (www.cs.le.ac.uk/people/hqy1)
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The Testing Problems
programmers
Should write
few
Do
Why?
I am so busy
It is difficult
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The Testing Problems
Programmers need such kind of tool:
“Writing a few lines of code, then a test that should run, or even better, to write a test that won't run, then write the code that will make it run.”
JUnit is that kind of tool!
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JUnit
The testing problems The framework of JUnitA case study
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JUnit
The testing problemsThe framework of JUnitA case study
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A Case Study
Lab3Queue:enQueue methoddeQueue method
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Include junit library in eclipse
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How to Write A TestCase using Junit (available in Eclipse 3.1 or later)
Step 1:Create a JUNIT test case (File -> New -> Junit Test Case
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Create a test case
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Create a test case
import junit.framework.*;
public class Lab3QueueTest {
public void setUp() throws Exception {
}
public void tearDown() throws Exception {
}
}
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Create a test case
import junit.framework.*;
public class Lab3QueueTest extends TestCase {
Lab3Queue testQueue;
int queueSize;
public void setUp() throws Exception {
testQueue = new Lab3Queue();
queueSize = testQueue.getSize();
}
public void tearDown() throws Exception {
}
}
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Create a test case
For each method that you are going to test:Write a corresponding test method named:
test<method name> in the test case
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Create a test case
public void testenQueue() {
int newItem = 1;
queueSize = testQueue.getSize();
testQueue.enQueue(newItem);
Assert.assertEquals(queueSize+1, testQueue.getSize());
int actualItem = ((Integer) testQueue.getLastNode()).intValue();
Assert.assertEquals(newItem, actualItem);
}
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Assert assertEquals(expected, actual) assertEquals(message, expected, actual) assertEquals(expected, actual, delta) assertEquals(message, expected, actual, delta) assertFalse(condition) assertFalse(message, condition) Assert(Not)Null(object) Assert(Not)Null(message, object) Assert(Not)Same(expected, actual) Assert(Not)Same(message, expected, actual) assertTrue(condition) assertTrue(message, condition)
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Structure
setUp() Storing the fixture's objects in instance variables of your
TestCase subclass and initialize them by overriding the setUp method
tearDown() Releasing the fixture’s
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Writing a test suite
Step 2: Create a test suite by choosing
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Writing a test suite
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Writing a test suite
import junit.framework.Test;
import junit.framework.TestSuite;
public class AllTests {
public static Test suite() {
TestSuite suite = new TestSuite("Test for AiportSimulation");
//$JUnit-BEGIN$
suite.addTestSuite(Lab3QueueTest.class);
//$JUnit-END$
return suite;
}
}
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Running a test
AllTests -> choose Run -> Run As -> Junit Test
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Running a test
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Design Test Cases
The real world scenarios The number boundaries
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Tips
Testcases must extend TestCaseAll ‘test’ methods must include at least one call toan assert method or to fail:
assertEquals (String message, ...)assertNotNull (String message, Object obj)assertNull (String message, Object obj)assertSame (String message, Obj exp, Obj
actual)assertTrue (String message, boolean condition)fail (String message)
Remove System.out.println after test cases are working and rely on Junit assert methods to determine success/failure.
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Dynamic Run
Since JUnit 2.0 there is an even simpler dynamic way. You only pass the class with the tests to a TestSuite and it extracts the test methods automatically.
suite.addTestSuite(Lab3QueueTest.class);
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Project 3 - Algorithm
