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2010-06-01T05:03:19Z

1 версия

в 17:44, 31 мая 2010

2010-05-31T17:44:27Z

Новая страница

== extends TestCase ==



<source lang="java">
import junit.framework.*;
public class TestSimple extends TestCase {
public TestSimple(String name) {
super(name);
}
public void testAdd() {
assertEquals(2, 1+1);
}
}</source>



== Init class being tested in test case method ==



<source lang="java">
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
public class TestClassTwo extends TestCase {
public TestClassTwo(String method) {
super(method);
}
public void testLongRunner() {
TSP tsp = new TSP();
assertEquals(2300, tsp.shortestPath(50));
}
public void testShortTest() {
TSP tsp = new TSP();
assertEquals(140, tsp.shortestPath(5));
}
public void testAnotherShortTest() {
TSP tsp = new TSP();
assertEquals(586, tsp.shortestPath(10));
}
public static Test suite() {
TestSuite suite = new TestSuite();
// Only include short tests
suite.addTest(new TestClassTwo("testShortTest"));
suite.addTest(new TestClassTwo("testAnotherShortTest"));
return suite;
}
}
class TSP {
public int shortestPath(int numCities) {
switch (numCities) {
case 50:
return 2300;
case 5:
return 140;
case 10:
return 586;
}
return 0;
}
}</source>



== JUnit Test Composition ==



<source lang="java">
import junit.framework.*;
public class TestClassOne extends TestCase {
public TestClassOne(String method) {
super(method);
}
public void testAddition() {
assertEquals(4, 2+2);
}
public void testSubtraction() {
assertEquals(0, 2-2);
}
}</source>



== Per-Test Setup and Tear-Down ==



<source lang="java">
import java.sql.Connection;
import junit.framework.TestCase;
public class TestDB extends TestCase {
private Connection dbConn;
protected void setUp() {
// connect to database
}
protected void tearDown() {
// disconnect from database
}
public void testAccountAccess() {
}
public void testEmployeeAccess() {
}
}</source>



== Test algorithm ==



<source lang="java">
import junit.framework.TestCase;
public class TestLargest extends TestCase {
public TestLargest(String name) {
super(name);
}
public void testOrder() {
assertEquals(9, Largest.largest(new int[] { 9, 8, 7 }));
assertEquals(9, Largest.largest(new int[] { 8, 9, 7 }));
assertEquals(9, Largest.largest(new int[] { 7, 8, 9 }));
}
public void testEmpty() {
try {
Largest.largest(new int[] {});
fail("Should have thrown an exception");
} catch (RuntimeException e) {
assertTrue(true);
}
}
public void testOrder2() {
int[] arr = new int[3];
arr[0] = 8;
arr[1] = 9;
arr[2] = 7;
assertEquals(9, Largest.largest(arr));
}
}
class Largest {
public static int largest(int[] list) {
int index, max = Integer.MAX_VALUE;
if (list.length == 0) {
throw new RuntimeException("Empty list");
}
for (index = 0; index < list.length - 1; index++) {
if (list[index] > max) {
max = list[index];
}
}
return max;
}
}</source>



== Test Skeleton ==



<source lang="java">
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
public class TestSkeleton extends TestCase {
/**
* Per-method test set up
*/
public void setUp() {
}
/**
* Per-method test tear down
*/
public void tearDown() {
}
/**
* Add tests here: public void testName() ...
*/
public TestSkeleton(String name) {
super(name);
}
/**
* Default suite method
*/
public static Test suite() {
return new TestSuite(TestSkeleton.class);
}
/**
* Note -- "main" will only be run when invoked individually from the command
* line (not via Ant"s JUnit Task, etc.)
*/
public static void main(String[] args) {
TestSuite suite = new TestSuite();
if (args.length != 0) {
// Run specific tests as indicated from the
// command line
for (int i = 0; i < args.length; i++) {
suite.addTest(new TestSkeleton(args[i]));
}
} else {
// Dynamically discover all of them, or use
// user-defined suite
suite.addTest(TestSkeleton.suite());
}
junit.textui.TestRunner.run(suite);
}
}</source>



== Test your stack structure ==



<source lang="java">
import junit.framework.TestCase;
public class TestMyStack extends TestCase {
public void testEmpty() throws Exception {
MyStack stack = new MyStack();
stack.checkInvariant();
stack.push("sample");
stack.checkInvariant();
assertEquals("sample", stack.pop());
stack.checkInvariant();
stack.delete(1);
stack.checkInvariant();
}
}
class MyStack {
public MyStack() {
stack = new String[100];
next_index = 0;
}
public String pop() {
return stack[--next_index];
}
public void delete(int n) {
next_index -= n;
}
public void push(String aString) {
stack[next_index++] = aString;
}
public String top() {
return stack[next_index - 1];
}
public void checkInvariant() throws Exception {
if (!(next_index >= 0 && next_index < stack.length)) {
throw new Exception("next_index out of range: " + next_index + " for stack length "
+ stack.length);
}
}
private int next_index;
private String[] stack;
}</source>



== Use assertEquals in a test method ==



<source lang="java">
import junit.framework.TestCase;
public class TestLargest extends TestCase {
public TestLargest(String name) {
super(name);
}
public void testAdds() {
assertEquals(2, 1 + 1);
assertEquals(4, 2 + 2);
assertEquals(-8, -12 + 4);
}
}</source>

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Admin: 1 версия

в 17:44, 31 мая 2010