| java.lang.Object | ||
| ↳ | junit.framework.Assert | |
| ↳ | junit.framework.TestCase | |
Known Direct Subclasses
|
A test case defines the fixture to run multiple tests. To define a test case
1) implement a subclass of TestCase
2) define instance variables that store the state of the fixture
3) initialize the fixture state by overriding setUp
4) clean-up after a test by overriding tearDown.
Each test runs in its own fixture so there
can be no side effects among test runs.
Here is an example:
public class MathTest extends TestCase {
protected double fValue1;
protected double fValue2;
protected void setUp() {
fValue1= 2.0;
fValue2= 3.0;
}
}
For each test implement a method which interacts
with the fixture. Verify the expected results with assertions specified
by calling assertTrue with a boolean.
public void testAdd() {
double result= fValue1 + fValue2;
assertTrue(result == 5.0);
}
Once the methods are defined you can run them. The framework supports
both a static type safe and more dynamic way to run a test.
In the static way you override the runTest method and define the method to
be invoked. A convenient way to do so is with an anonymous inner class.
TestCase test= new MathTest("add") {
public void runTest() {
testAdd();
}
};
test.run();
The dynamic way uses reflection to implement runTest. It dynamically finds
and invokes a method.
In this case the name of the test case has to correspond to the test method
to be run.
TestCase= new MathTest("testAdd");
test.run();
The tests to be run can be collected into a TestSuite. JUnit provides
different test runners which can run a test suite and collect the results.
A test runner either expects a static method suite as the entry
point to get a test to run or it will extract the suite automatically.
public static Test suite() {
suite.addTest(new MathTest("testAdd"));
suite.addTest(new MathTest("testDivideByZero"));
return suite;
}
| Public Constructors | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
No-arg constructor to enable serialization.
| |||||||||||
Constructs a test case with the given name.
| |||||||||||
| Public Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Counts the number of test cases executed by run(TestResult result).
| |||||||||||
Gets the name of a TestCase
| |||||||||||
A convenience method to run this test, collecting the results with a
default TestResult object.
| |||||||||||
Runs the test case and collects the results in TestResult.
| |||||||||||
Runs the bare test sequence.
| |||||||||||
Sets the name of a TestCase
| |||||||||||
Returns a string representation of the test case
| |||||||||||
| Protected Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Creates a default TestResult object
| |||||||||||
Override to run the test and assert its state.
| |||||||||||
Sets up the fixture, for example, open a network connection.
| |||||||||||
Tears down the fixture, for example, close a network connection.
| |||||||||||
|
[Expand]
Inherited Methods | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
From class junit.framework.Assert
| |||||||||||
From class java.lang.Object
| |||||||||||
From interface junit.framework.Test
| |||||||||||
No-arg constructor to enable serialization. This method is not intended to be used by mere mortals without calling setName().
Counts the number of test cases executed by run(TestResult result).
A convenience method to run this test, collecting the results with a default TestResult object.
Runs the test case and collects the results in TestResult.
Runs the bare test sequence.
| Throwable | if any exception is thrown |
|---|
Sets the name of a TestCase
| name | The name to set |
|---|
Returns a string representation of the test case
Creates a default TestResult object
Override to run the test and assert its state.
| Throwable | if any exception is thrown |
|---|
Sets up the fixture, for example, open a network connection. This method is called before a test is executed.
| Exception |
|---|
Tears down the fixture, for example, close a network connection. This method is called after a test is executed.
| Exception |
|---|