How to use TestCase class of junit.framework package

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23import java.io.PrintWriter;4import java.io.StringWriter;56import junit.framework.TestCase;7import junit.runner.BaseTestRunner;89public class StackFilterTest extends TestCase {10 String fFiltered;11 String fUnfiltered;12 13 @Override14 protected void setUp() {15 StringWriter swin= new StringWriter();16 PrintWriter pwin= new PrintWriter(swin);17 pwin.println("junit.framework.AssertionFailedError");18 pwin.println(" at junit.framework.Assert.fail(Assert.java:144)");19 pwin.println(" at junit.framework.Assert.assert(Assert.java:19)");20 pwin.println(" at junit.framework.Assert.assert(Assert.java:26)");21 pwin.println(" at MyTest.f(MyTest.java:13)");22 pwin.println(" at MyTest.testStackTrace(MyTest.java:8)");23 pwin.println(" at java.lang.reflect.Method.invoke(Native Method)");24 pwin.println(" at junit.framework.TestCase.runTest(TestCase.java:156)");25 pwin.println(" at junit.framework.TestCase.runBare(TestCase.java:130)");26 pwin.println(" at junit.framework.TestResult$1.protect(TestResult.java:100)");27 pwin.println(" at junit.framework.TestResult.runProtected(TestResult.java:118)");28 pwin.println(" at junit.framework.TestResult.run(TestResult.java:103)");29 pwin.println(" at junit.framework.TestCase.run(TestCase.java:121)");30 pwin.println(" at junit.framework.TestSuite.runTest(TestSuite.java:157)");31 pwin.println(" at junit.framework.TestSuite.run(TestSuite.java, Compiled Code)");32 pwin.println(" at junit.swingui.TestRunner$17.run(TestRunner.java:669)");33 fUnfiltered= swin.toString();3435 StringWriter swout= new StringWriter();36 PrintWriter pwout= new PrintWriter(swout);37 pwout.println("junit.framework.AssertionFailedError");38 pwout.println(" at MyTest.f(MyTest.java:13)");39 pwout.println(" at MyTest.testStackTrace(MyTest.java:8)");40 fFiltered= swout.toString();41 }42 43 public void testFilter() { ...

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1package junit.tests.framework;23import junit.framework.Protectable;4import junit.framework.Test;5import junit.framework.TestCase;6import junit.framework.TestResult;78/​**9 * Test an implementor of junit.framework.Test other than TestCase or TestSuite10 */​11public class TestImplementorTest extends TestCase {12 public static class DoubleTestCase implements Test {13 private TestCase fTestCase;14 15 public DoubleTestCase(TestCase testCase) {16 fTestCase= testCase;17 }18 19 public int countTestCases() {20 return 2;21 }22 23 public void run(TestResult result) {24 result.startTest(this);25 Protectable p= new Protectable() {26 public void protect() throws Throwable {27 fTestCase.runBare();28 fTestCase.runBare();29 }30 };31 result.runProtected(this, p);32 result.endTest(this);33 }34 }35 36 private DoubleTestCase fTest;37 38 public TestImplementorTest() {39 TestCase testCase= new TestCase() {40 @Override41 public void runTest() {42 }43 };44 fTest= new DoubleTestCase(testCase);45 }46 47 public void testSuccessfulRun() {48 TestResult result= new TestResult();49 fTest.run(result);50 assertEquals(fTest.countTestCases(), result.runCount());51 assertEquals(0, result.errorCount());52 assertEquals(0, result.failureCount());53 }54} ...

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TestCase

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1import junit.framework.TestCase;2public class TestJunit extends TestCase {3 protected int value1, value2;4 protected void setUp(){5 value1 = 3;6 value2 = 3;7 }8 public void testAdd(){9 double result = value1 + value2;10 assertTrue(result == 6);11 }12}13OK (4 tests)14@Test(timeout=1000)15@Test(expected=ArithmeticException.class)16@Test(timeout=1000, expected=ArithmeticException.class)17@RunWith(Parameterized.class)

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TestCase

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1import junit.framework.TestCase;2public class Test extends TestCase {3 protected int value1, value2;4 protected void setUp(){5 value1 = 3;6 value2 = 3;7 }8 public void testAdd(){9 double result = value1 + value2;10 assertTrue(result == 6);11 }12}13The Test class extends TestCase class, which provides the functionality of the test case to the subclass. The test case class contains three important methods:14OK (1 test)

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TestCase

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1import junit.framework.TestCase;2public class Test extends TestCase {3 protected int value1, value2;4 protected void setUp(){5 value1 = 3;6 value2 = 3;7 }8 public void testAdd(){9 double result = value1 + value2;10 assertTrue(result == 6);11 }12}13C:\Users\USER\Documents\Java>javac -cp .;junit-4.12.jar Test.java14C:\Users\USER\Documents\Java>java -cp .;junit-4.12.jar;junit-4.12-sources.jar;junit-4.12-javadoc.jar;hamcrest-core-1.3.jar org.junit.runner.JUnitCore Test15OK (1 test)

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TestCase

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1package com.javatpoint;2import junit.framework.TestCase;3public class TestJunit1 extends TestCase {4 protected int value1, value2;5 protected void setUp(){6 value1 = 3;7 value2 = 3;8 }9 public void testAdd(){10 double result = value1 + value2;11 assertTrue(result == 6);12 }13}14C:\Users\shiva sai\Desktop>javac -cp .;junit-4.13.jar;hamcrest-core-1.3.jar TestJunit1.java15C:\Users\shiva sai\Desktop>java -cp .;junit-4.13.jar;hamcrest-core-1.3.jar org.junit.runner.JUnitCore TestJunit116OK (1 test)

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TestCase

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1import junit.framework.TestCase;2public class MyTest extends TestCase {3 public void testAdd() {4 int num = 5;5 String temp = null;6 String str = "Junit is working fine";7 assertEquals("Junit is working fine", str);8 assertFalse(num > 6);9 assertNotNull(str);10 }11}

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TestCase

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1import org.junit.Test;2import org.junit.Before;3import org.junit.After;4import static org.junit.Assert.assertEquals;5import static org.junit.Assert.assertNotNull;6import static org.junit.Assert.assertTrue;7public class TestJunit1 {8 protected int value1, value2;9 public void setUp() {10 value1 = 3;11 value2 = 3;12 }13 public void testAdd() {14 double result = value1 + value2;15 assertTrue(result == 6);16 }17 public void testSubtract() {18 double result = value1 - value2;19 assertTrue(result == 0);20 }21 public void testMultiply() {22 double result = value1 * value2;23 assertTrue(result == 9);24 }25 public void testDivide() {26 double result = value1 /​ value2;27 assertTrue(result == 1);28 }29}

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TestCase

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1import junit.framework.TestCase;2import static junit.framework.TestCase.assertEquals;3import org.junit.Test;4import org.junit.Before;5import org.junit.After;6public class TestJunit extends TestCase {7 protected double fValue1;8 protected double fValue2;9 public void setUp() {10 fValue1 = 2.0;11 fValue2 = 3.0;12 }13 public void testAdd() {14 System.out.println("No of Test Case = "+ this.countTestCases());15 String name = this.getName();16 System.out.println("Test Case Name = "+ name);17 this.setName("testNewAdd");18 String newName = this.getName();19 System.out.println("Updated Test Case Name = "+ newName);20 }21 public void tearDown( ) {22 }23}

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TestCase

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1import junit.framework.TestCase;2import java.util.ArrayList;3public class TestArrayList extends TestCase {4 public void testArrayList() {5 ArrayList<String> list = new ArrayList<String>();6 list.add("abc");7 list.add("def");8 list.add("ghi");9 assertEquals(3, list.size());10 assertEquals("abc", list.get(0));11 assertEquals("def", list.get(1));12 assertEquals("ghi", list.get(2));13 }14}15import org.junit.Test;16import java.util.ArrayList;17import static org.junit.Assert.assertEquals;18public class TestArrayList {19 public void testArrayList() {20 ArrayList<String> list = new ArrayList<String>();21 list.add("abc");22 list.add("def");23 list.add("ghi");24 assertEquals(3, list.size());25 assertEquals("abc", list.get(0));26 assertEquals("def", list.get(1));27 assertEquals("ghi", list.get(2));28 }29}

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1import org.junit.Test;2import org.junit.Assert;3import org.junit.Before;4public class JUnit4Test {5 private Calculator calculator;6 public void setUp() {7 calculator = new Calculator();8 }9 public void testAdd() {10 int result = calculator.add(3, 4);11 Assert.assertEquals(7, result);12 }13 public void testSubtract() {14 int result = calculator.subtract(3, 4);15 Assert.assertEquals(-1, result);16 }17}

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1public String randomString(int length, String characterSet) {2 return IntStream.range(0, length).map(i -> new SecureRandom().nextInt(characterSet.length())).mapToObj(randomInt -> characterSet.substring(randomInt, randomInt + 1)).collect(Collectors.joining());3}45@Test6public void buildFiveRandomStrings() {7 for (int q = 0; q < 5; q++) {8 System.out.println(randomString(10, "ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789")); /​/​ The character set can basically be anything9 }10}11
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1import org.apache.commons.lang3.RandomStringUtils;23String keyLength = 20;4RandomStringUtils.randomAlphanumeric(keylength);5
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Using JUnit 4.4 you can use assertThat() together with the Hamcrest code (don't worry, it's shipped with JUnit, no need for an extra .jar) to produce complex self-describing asserts including ones that operate on collections:

import static org.junit.Assert.assertThat;
import static org.junit.matchers.JUnitMatchers.*;
import static org.hamcrest.CoreMatchers.*;

List<String> l = Arrays.asList("foo", "bar");
assertThat(l, hasItems("foo", "bar"));
assertThat(l, not(hasItem((String) null)));
assertThat(l, not(hasItems("bar", "quux")));
// check if two objects are equal with assertThat()

// the following three lines of code check the same thing.
// the first one is the "traditional" approach,
// the second one is the succinct version and the third one the verbose one 
assertEquals(l, Arrays.asList("foo", "bar")));
assertThat(l, is(Arrays.asList("foo", "bar")));
assertThat(l, is(equalTo(Arrays.asList("foo", "bar"))));

Using this approach you will automagically get a good description of the assert when it fails.

https://stackoverflow.com/questions/1086691/collectionassert-in-junit

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