junit.framework

Class TestCase

java.lang.Object

junit.framework.Assert

junit.framework.TestCase

All Implemented Interfaces:

Test

public abstract class TestCase
extends Assert
implements Test

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 Assert.assertTrue(String, boolean) 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 test= 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;
 }
 

See Also:

TestResult, TestSuite

Constructor Summary

Constructors

Constructor and Description
TestCase() No-arg constructor to enable serialization.
TestCase(String name) Constructs a test case with the given name.

Method Summary

Modifier and Type	Method and Description
static void	assertEquals(boolean expected, boolean actual) Asserts that two booleans are equal.
static void	assertEquals(byte expected, byte actual) Asserts that two bytes are equal.
static void	assertEquals(char expected, char actual) Asserts that two chars are equal.
static void	assertEquals(double expected, double actual, double delta) Asserts that two doubles are equal concerning a delta.
static void	assertEquals(float expected, float actual, float delta) Asserts that two floats are equal concerning a delta.
static void	assertEquals(int expected, int actual) Asserts that two ints are equal.
static void	assertEquals(long expected, long actual) Asserts that two longs are equal.
static void	assertEquals(Object expected, Object actual) Asserts that two objects are equal.
static void	assertEquals(short expected, short actual) Asserts that two shorts are equal.
static void	assertEquals(String message, boolean expected, boolean actual) Asserts that two booleans are equal.
static void	assertEquals(String message, byte expected, byte actual) Asserts that two bytes are equal.
static void	assertEquals(String message, char expected, char actual) Asserts that two chars are equal.
static void	assertEquals(String message, double expected, double actual, double delta) Asserts that two doubles are equal concerning a delta.
static void	assertEquals(String message, float expected, float actual, float delta) Asserts that two floats are equal concerning a positive delta.
static void	assertEquals(String message, int expected, int actual) Asserts that two ints are equal.
static void	assertEquals(String message, long expected, long actual) Asserts that two longs are equal.
static void	assertEquals(String message, Object expected, Object actual) Asserts that two objects are equal.
static void	assertEquals(String message, short expected, short actual) Asserts that two shorts are equal.
static void	assertEquals(String expected, String actual) Asserts that two Strings are equal.
static void	assertEquals(String message, String expected, String actual) Asserts that two Strings are equal.
static void	assertFalse(boolean condition) Asserts that a condition is false.
static void	assertFalse(String message, boolean condition) Asserts that a condition is false.
static void	assertNotNull(Object object) Asserts that an object isn't null.
static void	assertNotNull(String message, Object object) Asserts that an object isn't null.
static void	assertNotSame(Object expected, Object actual) Asserts that two objects do not refer to the same object.
static void	assertNotSame(String message, Object expected, Object actual) Asserts that two objects do not refer to the same object.
static void	assertNull(Object object) Asserts that an object is null.
static void	assertNull(String message, Object object) Asserts that an object is null.
static void	assertSame(Object expected, Object actual) Asserts that two objects refer to the same object.
static void	assertSame(String message, Object expected, Object actual) Asserts that two objects refer to the same object.
static void	assertTrue(boolean condition) Asserts that a condition is true.
static void	assertTrue(String message, boolean condition) Asserts that a condition is true.
int	countTestCases() Counts the number of test cases executed by run(TestResult result).
protected TestResult	createResult() Creates a default TestResult object
static void	fail() Fails a test with no message.
static void	fail(String message) Fails a test with the given message.
static void	failNotEquals(String message, Object expected, Object actual)
static void	failNotSame(String message, Object expected, Object actual)
static void	failSame(String message)
static String	format(String message, Object expected, Object actual)
String	getName() Gets the name of a TestCase
TestResult	run() A convenience method to run this test, collecting the results with a default TestResult object.
void	run(TestResult result) Runs the test case and collects the results in TestResult.
void	runBare() Runs the bare test sequence.
protected void	runTest() Override to run the test and assert its state.
void	setName(String name) Sets the name of a TestCase
protected void	setUp() Sets up the fixture, for example, open a network connection.
protected void	tearDown() Tears down the fixture, for example, close a network connection.
String	toString() Returns a string representation of the test case

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

TestCase

public TestCase()

No-arg constructor to enable serialization. This method is not intended to be used by mere mortals without calling setName().

TestCase

public TestCase(String name)

Constructs a test case with the given name.

Method Detail

countTestCases

public int countTestCases()

Counts the number of test cases executed by run(TestResult result).

Specified by:

countTestCases in interface Test

createResult

protected TestResult createResult()

Creates a default TestResult object

See Also:

TestResult

run

public TestResult run()

A convenience method to run this test, collecting the results with a default TestResult object.

See Also:

TestResult

run

public void run(TestResult result)

Runs the test case and collects the results in TestResult.

Specified by:

run in interface Test

runBare

public void runBare()
             throws Throwable

Runs the bare test sequence.

Throws:

Throwable - if any exception is thrown

runTest

protected void runTest()
                throws Throwable

Override to run the test and assert its state.

Throws:

Throwable - if any exception is thrown

assertTrue

public static void assertTrue(String message,
                              boolean condition)

Asserts that a condition is true. If it isn't it throws an AssertionFailedError with the given message.

assertTrue

public static void assertTrue(boolean condition)

Asserts that a condition is true. If it isn't it throws an AssertionFailedError.

assertFalse

public static void assertFalse(String message,
                               boolean condition)

Asserts that a condition is false. If it isn't it throws an AssertionFailedError with the given message.

assertFalse

public static void assertFalse(boolean condition)

Asserts that a condition is false. If it isn't it throws an AssertionFailedError.

fail

public static void fail(String message)

Fails a test with the given message.

fail

public static void fail()

Fails a test with no message.

assertEquals

public static void assertEquals(String message,
                                Object expected,
                                Object actual)

Asserts that two objects are equal. If they are not an AssertionFailedError is thrown with the given message.

assertEquals

public static void assertEquals(Object expected,
                                Object actual)

Asserts that two objects are equal. If they are not an AssertionFailedError is thrown.

assertEquals

public static void assertEquals(String message,
                                String expected,
                                String actual)

Asserts that two Strings are equal.

assertEquals

public static void assertEquals(String expected,
                                String actual)

Asserts that two Strings are equal.

assertEquals

public static void assertEquals(String message,
                                double expected,
                                double actual,
                                double delta)

Asserts that two doubles are equal concerning a delta. If they are not an AssertionFailedError is thrown with the given message. If the expected value is infinity then the delta value is ignored.

assertEquals

public static void assertEquals(double expected,
                                double actual,
                                double delta)

Asserts that two doubles are equal concerning a delta. If the expected value is infinity then the delta value is ignored.

assertEquals

public static void assertEquals(String message,
                                float expected,
                                float actual,
                                float delta)

Asserts that two floats are equal concerning a positive delta. If they are not an AssertionFailedError is thrown with the given message. If the expected value is infinity then the delta value is ignored.

assertEquals

public static void assertEquals(float expected,
                                float actual,
                                float delta)

Asserts that two floats are equal concerning a delta. If the expected value is infinity then the delta value is ignored.

assertEquals

public static void assertEquals(String message,
                                long expected,
                                long actual)

Asserts that two longs are equal. If they are not an AssertionFailedError is thrown with the given message.

assertEquals

public static void assertEquals(long expected,
                                long actual)

Asserts that two longs are equal.

assertEquals

public static void assertEquals(String message,
                                boolean expected,
                                boolean actual)

Asserts that two booleans are equal. If they are not an AssertionFailedError is thrown with the given message.

assertEquals

public static void assertEquals(boolean expected,
                                boolean actual)

Asserts that two booleans are equal.

assertEquals

public static void assertEquals(String message,
                                byte expected,
                                byte actual)

Asserts that two bytes are equal. If they are not an AssertionFailedError is thrown with the given message.

assertEquals

public static void assertEquals(byte expected,
                                byte actual)

Asserts that two bytes are equal.

assertEquals

public static void assertEquals(String message,
                                char expected,
                                char actual)

Asserts that two chars are equal. If they are not an AssertionFailedError is thrown with the given message.

assertEquals

public static void assertEquals(char expected,
                                char actual)

Asserts that two chars are equal.

assertEquals

public static void assertEquals(String message,
                                short expected,
                                short actual)

Asserts that two shorts are equal. If they are not an AssertionFailedError is thrown with the given message.

assertEquals

public static void assertEquals(short expected,
                                short actual)

Asserts that two shorts are equal.

assertEquals

public static void assertEquals(String message,
                                int expected,
                                int actual)

Asserts that two ints are equal. If they are not an AssertionFailedError is thrown with the given message.

assertEquals

public static void assertEquals(int expected,
                                int actual)

Asserts that two ints are equal.

assertNotNull

public static void assertNotNull(Object object)

Asserts that an object isn't null.

assertNotNull

public static void assertNotNull(String message,
                                 Object object)

Asserts that an object isn't null. If it is an AssertionFailedError is thrown with the given message.

assertNull

public static void assertNull(Object object)

Asserts that an object is null. If it isn't an AssertionError is thrown. Message contains: Expected: but was: object

Parameters:

object - Object to check or null

assertNull

public static void assertNull(String message,
                              Object object)

Asserts that an object is null. If it is not an AssertionFailedError is thrown with the given message.

assertSame

public static void assertSame(String message,
                              Object expected,
                              Object actual)

Asserts that two objects refer to the same object. If they are not an AssertionFailedError is thrown with the given message.

assertSame

public static void assertSame(Object expected,
                              Object actual)

Asserts that two objects refer to the same object. If they are not the same an AssertionFailedError is thrown.

assertNotSame

public static void assertNotSame(String message,
                                 Object expected,
                                 Object actual)

Asserts that two objects do not refer to the same object. If they do refer to the same object an AssertionFailedError is thrown with the given message.

assertNotSame

public static void assertNotSame(Object expected,
                                 Object actual)

Asserts that two objects do not refer to the same object. If they do refer to the same object an AssertionFailedError is thrown.

failSame

public static void failSame(String message)

failNotSame

public static void failNotSame(String message,
                               Object expected,
                               Object actual)

failNotEquals

public static void failNotEquals(String message,
                                 Object expected,
                                 Object actual)

format

public static String format(String message,
                            Object expected,
                            Object actual)

setUp

protected void setUp()
              throws Exception

Sets up the fixture, for example, open a network connection. This method is called before a test is executed.

Throws:

Exception

tearDown

protected void tearDown()
                 throws Exception

Tears down the fixture, for example, close a network connection. This method is called after a test is executed.

Throws:

Exception

toString

public String toString()

Returns a string representation of the test case

Overrides:

toString in class Object

getName

public String getName()

Gets the name of a TestCase

Returns:

the name of the TestCase

setName

public void setName(String name)

Sets the name of a TestCase

Parameters:

name - the name to set