How to use getTestConstructor method of junit.framework.TestSuite class

Best junit code snippet using junit.framework.TestSuite.getTestConstructor

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...78 @SuppressWarnings({"unchecked", "cast"})79 protected boolean hasPublicConstructor(Class<?> testClass) {80 try {81 /​/​ In Eclipse 3.6 RCP Windows-x64, the signature has changed from82 /​/​ getTestConstructor(Class)83 /​/​ to:84 /​/​ getTestConstructor(Class<? extends TestCase>)85 /​/​ which is enough to create an error. To solve it, we cast into the86 /​/​ generics expected by the JUnit framework used by 3.6 and suppress the87 /​/​ warnings generated by the compiler under 3.588 TestSuite.getTestConstructor((Class<? extends TestCase>) testClass);89 } catch(NoSuchMethodException e) {90 return false;91 }92 return true;93 }94 /​**95 * Load the class given by the plugin aka bundle file path96 * @param filePath - path of class in bundle97 * @param expectedPackage - expected package of class98 * @throws ClassNotFoundException99 */​100 protected Class<?> getClass(String filePath, String expectedPackage) throws ClassNotFoundException {101 String dotPath = filePath.replace('/​', '.');102 /​/​ remove the output folders, by finding where package name starts...

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getTestConstructor

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1public class JunitTestSuite {2 public static Test suite() {3 TestSuite suite = new TestSuite();4 suite.addTestSuite(JunitTest1.class);5 suite.addTestSuite(JunitTest2.class);6 return suite;7 }8}9package com.journaldev.junit;10import org.junit.runner.JUnitCore;11import org.junit.runner.Result;12import org.junit.runner.notification.Failure;13public class JunitTestSuiteRunner {14 public static void main(String[] args) {15 Result result = JUnitCore.runClasses(JunitTestSuite.class);16 for(Failure failure : result.getFailures()) {17 System.out.println(failure.toString());18 }19 System.out.println(result.wasSuccessful());20 }21}22OK (1 test)

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getTestConstructor

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1public class TestSuiteExample {2 public static void main(String[] args) {3 TestSuite suite = new TestSuite();4 suite.addTest(new TestSuite(TestClass1.class));5 suite.addTest(new TestSuite(TestClass2.class));6 suite.addTest(new TestSuite(TestClass3.class));7 TestResult result = new TestResult();8 suite.run(result);9 System.out.println("Number of test cases = " + result.runCount());10 }11}

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getTestConstructor

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1import junit.framework.Test;2import junit.framework.TestSuite;3public class TestAll extends TestSuite {4 public static Test suite() {5 TestSuite testSuite = new TestSuite();6 testSuite.addTestSuite(TestJunit1.class);7 testSuite.addTestSuite(TestJunit2.class);8 return testSuite;9 }10}11package com.tutorialspoint.junit;12import org.junit.Test;13import static org.junit.Assert.assertEquals;14public class TestJunit1 {15 String message = "Robert"; 16 MessageUtil messageUtil = new MessageUtil(message);17 public void testPrintMessage() { 18 System.out.println("Inside testPrintMessage()"); 19 assertEquals(message,messageUtil.printMessage());20 }21}22package com.tutorialspoint.junit;23import org.junit.Test;24import static org.junit.Assert.assertEquals;25public class TestJunit2 {26 String message = "Robert"; 27 MessageUtil messageUtil = new MessageUtil(message);28 public void testSalutationMessage() {29 System.out.println("Inside testSalutationMessage()");30 message = "Hi!" + "Robert";31 assertEquals(message,messageUtil.salutationMessage());32 }33}34package com.tutorialspoint.junit;35public class MessageUtil {36 private String message;37 public MessageUtil(String message){38 this.message = message; 39 }40 public String printMessage(){41 System.out.println(message);42 return message;43 } 44 public String salutationMessage(){45 message = "Hi!" + message;46 System.out.println(message);47 return message;48 } 49}50package com.tutorialspoint.junit;51import org.junit.runner.JUnitCore;52import org.junit.runner.Result;53import org.junit.runner.notification.Failure;54public class TestRunner {55 public static void main(String[] args) {56 Result result = JUnitCore.runClasses(TestAll.class);57 for (Failure failure : result.getFailures()) {58 System.out.println(failure.toString());59 }60 System.out.println(result.wasSuccessful());61 }62}63Inside testSalutationMessage()64Inside testPrintMessage()

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getTestConstructor

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1public class TestSuiteTest extends TestCase {2 public TestSuiteTest(String name) {3 super(name);4 }5 public static Test suite() {6 TestSuite suite = new TestSuite();7 suite.addTest(new TestSuite(TestSuiteTest.class));8 return suite;9 }10 public void testAddTest() {11 TestSuite suite = new TestSuite();12 suite.addTest(new TestSuite(TestSuiteTest.class));13 Test test = suite.testAt(0);14 assertTrue(test instanceof TestSuite);15 TestSuite ts = (TestSuite)test;16 assertEquals(1, ts.testCount());17 test = ts.testAt(0);18 assertTrue(test instanceof TestSuiteTest);19 }20 public void testAddTestSuite() {21 TestSuite suite = new TestSuite();22 suite.addTestSuite(TestSuiteTest.class);23 assertEquals(1, suite.testCount());24 Test test = suite.testAt(0);25 assertTrue(test instanceof TestSuiteTest);26 }27 public void testConstructor() {28 TestSuite suite = new TestSuite(TestSuiteTest.class);29 assertEquals(1, suite.testCount());30 Test test = suite.testAt(0);31 assertTrue(test instanceof TestSuiteTest);32 }33 public void testConstructorString() {34 TestSuite suite = new TestSuite("TestSuiteTest");35 assertEquals(1, suite.testCount());36 Test test = suite.testAt(0);37 assertTrue(test instanceof TestSuiteTest);38 }39 public void testConstructorWithTestName() {40 TestSuite suite = new TestSuite(TestSuiteTest.class, "testAddTest");41 assertEquals(1, suite.testCount());42 Test test = suite.testAt(0);43 assertTrue(test instanceof TestSuiteTest);44 assertEquals("testAddTest", ((TestCase)test).getName());45 }46 public void testConstructorWithTestName2() {47 TestSuite suite = new TestSuite(TestSuiteTest.class, "testAddTest");48 assertEquals(1, suite.testCount());49 Test test = suite.testAt(0);50 assertTrue(test instanceof TestSuiteTest);51 assertEquals("testAddTest", ((TestCase)test).getName());52 }53 public void testCountTestCases() {54 TestSuite suite = new TestSuite();55 suite.addTest(new TestSuite(TestSuiteTest.class));56 assertEquals(1, suite.countTestCases());57 }58 public void testEmptySuite() {

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getTestConstructor

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1public class TestSuiteTest extends TestCase {2 public TestSuiteTest(String name) {3 super(name);4 }5 public static void main(String[] args) {6 TestSuite suite = new TestSuite();7 suite.addTest(new TestSuite(TestSuiteTest.class));8 TestResult result = new TestResult();9 suite.run(result);10 System.out.println("Number of test cases = " + result.runCount());11 }12 public void testAdd() {13 assertTrue(true);14 }15 public void testFind() {16 assertTrue(true);17 }18}

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getTestConstructor

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1public class TestSuiteTest extends TestCase {2 public static Test suite() {3 TestSuite suite = new TestSuite();4 suite.addTestSuite(TestMethodTest.class);5 suite.addTestSuite(TestSuiteTest.class);6 return suite;7 }8 public void testSuite() {9 TestSuite suite = new TestSuite();10 suite.addTestSuite(TestMethodTest.class);11 suite.addTestSuite(TestSuiteTest.class);12 assertEquals(2, suite.countTestCases());13 Test test = suite.testAt(0);14 assertTrue(test instanceof TestMethodTest);15 test = suite.testAt(1);16 assertTrue(test instanceof TestSuiteTest);17 }18 public void testFailedConstruction() {19 TestSuite suite = new TestSuite();20 try {21 suite.addTest((Test) null);22 } catch (NullPointerException e) {23 return;24 }25 fail();26 }27}

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If you add in Hamcrest and JUnit4, you could do:

String x = "foo bar";
Assert.assertThat(x, CoreMatchers.containsString("foo"));

With some static imports, it looks a lot better:

assertThat(x, containsString("foo"));

The static imports needed would be:

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.CoreMatchers.containsString;
https://stackoverflow.com/questions/1092219/assertcontains-on-strings-in-junit

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  • Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.

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