91 lines
2.9 KiB
Java
91 lines
2.9 KiB
Java
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//: unittesting/JUnitDemo.java
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// Simple use of JUnit to test ArrayList
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// {Depends: junit.jar}
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import java.util.*;
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import org.junit.Test;
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import org.junit.Assert.*;
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// So we can see the list objects being created,
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// and keep track of when they are cleaned up:
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class CountedList extends ArrayList {
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private static int counter = 0;
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private int id = counter++;
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public CountedList() {
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System.out.println("CountedList #" + id);
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}
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public int getId() { return id; }
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}
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public class JUnitDemo {
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private CountedList list = new CountedList();
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// You can use the constructor instead of setUp():
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public JUnitDemo() {
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for(int i = 0; i < 3; i++)
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list.add("" + i);
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}
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// Thus, setUp() is optional, but is run right
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// before the test:
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protected void setUp() {
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System.out.println("Set up for " + list.getId());
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}
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// tearDown() is also optional, and is called after
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// each test. setUp() and tearDown() can be either
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// protected or public:
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public void tearDown() {
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System.out.println("Tearing down " + list.getId());
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}
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// All tests have method names beginning with "test":
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@Test
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public void testInsert() {
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System.out.println("Running testInsert()");
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org.junit.Assert.assertEquals(list.size(), 3);
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list.add(1, "Insert");
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org.junit.Assert.assertEquals(list.size(), 4);
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org.junit.Assert.assertEquals(list.get(1), "Insert");
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}
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@Test
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public void testReplace() {
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System.out.println("Running testReplace()");
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org.junit.Assert.assertEquals(list.size(), 3);
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list.set(1, "Replace");
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org.junit.Assert.assertEquals(list.size(), 3);
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org.junit.Assert.assertEquals(list.get(1), "Replace");
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}
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// A "helper" method to reduce code duplication. As long
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// as the name doesn't start with "test," it will not
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// be automatically executed by JUnit.
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private void compare(ArrayList lst, String[] strs) {
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Object[] array = lst.toArray();
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org.junit.Assert.assertTrue("Arrays not the same length",
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array.length == strs.length);
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for(int i = 0; i < array.length; i++)
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org.junit.Assert.assertEquals(strs[i], (String)array[i]);
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}
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@Test
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public void testOrder() {
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System.out.println("Running testOrder()");
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compare(list, new String[] { "0", "1", "2" });
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}
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@Test
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public void testRemove() {
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System.out.println("Running testRemove()");
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org.junit.Assert.assertEquals(list.size(), 3);
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list.remove(1);
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org.junit.Assert.assertEquals(list.size(), 2);
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compare(list, new String[] { "0", "2" });
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}
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@Test
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public void testAddAll() {
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System.out.println("Running testAddAll()");
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list.addAll(Arrays.asList(new Object[] {
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"An", "African", "Swallow"}));
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org.junit.Assert.assertEquals(list.size(), 6);
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compare(list, new String[] { "0", "1", "2",
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"An", "African", "Swallow" });
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}
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public static void main(String[] args) {
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// Invoke JUnit on the class:
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org.junit.runner.JUnitCore.runClasses(JUnitDemo.class);
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}
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} ///:~
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