How to use runSingleMethod method of junit.textui.TestRunner class

Best junit code snippet using junit.textui.TestRunner.runSingleMethod

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...158 if (testCase.equals(""))159 throw new Exception("Usage: TestRunner [-wait] testCaseName, where name is the name of the TestCase class");160 try {161 if (!method.equals("")) 162 return runSingleMethod(testCase, method, wait);163 Test suite= getTest(testCase);164 return doRun(suite, wait);165 } catch (Exception e) {166 throw new Exception("Could not create and run test suite: " + e);167 }168 }169 protected TestResult runSingleMethod(String testCase, String method, boolean wait) throws Exception {170 Class<? extends TestCase> testClass= loadSuiteClass(testCase).asSubclass(TestCase.class);171 Test test= TestSuite.createTest(testClass, method);172 return doRun(test, wait);173 }174 @Override175 protected void runFailed(String message) {176 System.err.println(message);177 System.exit(FAILURE_EXIT);178 }179 180 public void setPrinter(ResultPrinter printer) {181 fPrinter= printer;182 }183 ...

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runSingleMethod

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1package com.javatpoint;2import org.junit.runner.JUnitCore;3import org.junit.runner.Result;4import org.junit.runner.notification.Failure;5public class TestRunner {6 public static void main(String[] args) {7 Result result = JUnitCore.runClasses(TestJunit.class);8 for (Failure failure : result.getFailures()) {9 System.out.println(failure.toString());10 }11 System.out.println(result.wasSuccessful());12 }13}

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runSingleMethod

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1import org.junit.Test;2import org.junit.runner.JUnitCore;3import org.junit.runner.Result;4import org.junit.runner.notification.Failure;5import junit.textui.TestRunner;6public class TestRunnerSingleMethod {7 public static void main(String[] args) {8 Result result = JUnitCore.runClasses(TestJunit.class);9 for (Failure failure : result.getFailures()) {10 System.out.println(failure.toString());11 }12 System.out.println(result.wasSuccessful());13 }14 public void test() {15 TestRunner.runSingleMethod(TestJunit.class, "testAdd", new String[] {});16 }17}18 at java.lang.Thread.run(Thread.java:745)19 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)20 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)21 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)22 at java.lang.reflect.Method.invoke(Method.invoke:497)23 at org.junit.runner.JUnitCore.run(JUnitCore.java:137)24 at org.junit.runner.JUnitCore.run(JUnitCore.java:115)25 at org.junit.runner.JUnitCore.run(JUnitCore.java:105)26 at org.junit.runner.JUnitCore.run(JUnitCore.java:94)27 at org.junit.runner.JUnitCore.run(JUnitCore.java:83)28 at org.junit.Assert.fail(Assert.java:88)29 at org.junit.Assert.failNotEquals(Assert.java:743)30 at org.junit.Assert.assertEquals(Assert.java:118)31 at org.junit.Assert.assertEquals(Assert.java:555)32 at org.junit.Assert.assertEquals(Assert.java:542)33 at com.test.TestJunit.testAdd(TestJunit.java:17)34Your name to display (optional):

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runSingleMethod

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1import junit.framework.TestCase;2public class TestRunner extends TestCase {3 public void testRunSingleMethod() {4 String[] args = {"junit.textui.TestRunner", "TestRunner", "testRunSingleMethod"};5 junit.textui.TestRunner.main(args);6 }7}8OK (1 test)9import junit.framework.Test;10import junit.framework.TestSuite;11public class TestRunner extends TestSuite {12 public static Test suite() {13 TestSuite suite = new TestSuite();14 suite.addTestSuite(TestRunner.class);15 return suite;16 }17 public void testRunSingleMethod() {18 String[] args = {"junit.textui.TestRunner", "TestRunner", "testRunSingleMethod"};19 junit.textui.TestRunner.main(args);20 }21}22OK (1 test)23import junit.framework.TestCase;24public class TestRunner extends TestCase {25 public void testRunSingleMethod() {26 String[] args = {"junit.textui.TestRunner", "TestRunner", "testRunSingleMethod"};27 junit.textui.TestRunner.main(args);28 }29}30OK (1 test)31import junit.framework.TestCase;32public class TestRunner extends TestCase {33 public void testRunSingleMethod() {34 String[] args = {"junit.textui.TestRunner", "TestRunner", "testRunSingleMethod"};35 junit.textui.TestRunner.main(args);36 }37 public void testRunMultipleMethods() {38 String[] args = {"junit.textui.TestRunner", "TestRunner", "testRunSingleMethod,testRunMultipleMethods"};39 junit.textui.TestRunner.main(args);40 }41}

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runSingleMethod

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1import junit.framework.TestCase;2import junit.framework.TestResult;3import junit.framework.TestSuite;4import junit.textui.TestRunner;5public class TestRunnerTest extends TestCase {6 public void testSingleMethod() {7 TestResult result = new TestResult();8 TestSuite suite = new TestSuite(SingleMethodTest.class);9 TestRunner runner = new TestRunner();10 runner.runSingleMethod(suite, "testOne", result);11 assertEquals(1, result.runCount());12 assertEquals(1, result.failureCount());13 }14 public void testSingleMethod2() {15 TestResult result = new TestResult();16 TestSuite suite = new TestSuite(SingleMethodTest.class);17 TestRunner runner = new TestRunner();18 runner.runSingleMethod(suite, "testTwo", result);19 assertEquals(1, result.runCount());20 assertEquals(0, result.failureCount());21 }22 public static void main(String[] args) {23 junit.textui.TestRunner.run(new TestSuite(TestRunnerTest.class));24 }25}26class SingleMethodTest extends TestCase {27 public void testOne() {28 fail();29 }30 public void testTwo() {31 }32}

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runSingleMethod

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1public class TestRunner {2 public static void main(String[] args) throws Exception {3 Class testClass = Class.forName("org.junit.Test");4 Class[] params = new Class[] { String.class };5 Method method = testClass.getMethod("runSingleMethod", params);6 Object[] arguments = new Object[] { "testMethod" };7 Object result = method.invoke(testClass, arguments);8 System.out.println(result);9 }10}11public class TestRunner {12 public static void main(String[] args) throws Exception {13 Class testClass = Class.forName("org.junit.Test");14 Class[] params = new Class[] { Class.class, String.class };15 Method method = testClass.getMethod("runSingleMethod", params);16 Object[] arguments = new Object[] { TestRunner.class, "testMethod" };17 Object result = method.invoke(testClass, arguments);18 System.out.println(result);19 }20}21public class TestRunner {22 public static void main(String[] args) throws Exception {23 Class testClass = Class.forName("junit.textui.TestRunner");24 Class[] params = new Class[] { String.class };25 Method method = testClass.getMethod("runSingleMethod", params);26 Object[] arguments = new Object[] { "testMethod" };27 Object result = method.invoke(testClass, arguments);28 System.out.println(result);29 }30}31public class TestRunner {32 public static void main(String[] args) throws Exception {33 Class testClass = Class.forName("junit.textui.TestRunner");34 Class[] params = new Class[] { Class.class, String.class };35 Method method = testClass.getMethod("runSingleMethod", params);36 Object[] arguments = new Object[] { TestRunner.class, "testMethod" };37 Object result = method.invoke(testClass, arguments);

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runSingleMethod

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1package com.example.junit;2import junit.framework.Test;3import junit.framework.TestCase;4import junit.framework.TestSuite;5import junit.textui.TestRunner;6public class TestRunnerExample extends TestCase {7 public static void main(String[] args) {8 TestRunner.run(TestRunnerExample.class);9 }10 public static Test suite() {11 return new TestSuite(TestRunnerExample.class);12 }13 public void testAdd() {14 int num = 5;15 String temp = null;16 String str = "Junit is working fine";17 assertEquals("Junit is working fine", str);18 assertTrue(num > 6);19 assertFalse(num > 6);20 assertNotNull(str);21 }22}23package com.example.junit;24import junit.framework.Test;25import junit.framework.TestCase;26import junit.framework.TestSuite;27import junit.textui.TestRunner;28public class TestRunnerExample extends TestCase {29 public static void main(String[] args) {30 TestRunner.run(TestRunnerExample.class);31 }32 public static Test suite() {33 return new TestSuite(TestRunnerExample.class);34 }35 public void testAdd() {36 int num = 5;37 String temp = null;38 String str = "Junit is working fine";39 assertEquals("Junit is working fine", str);40 assertTrue(num > 6);41 assertFalse(num > 6);42 assertNotNull(str);43 }44}45 at junit.framework.Assert.fail(Assert.java:47)46 at junit.framework.Assert.failNotEquals(Assert.java:282)47 at junit.framework.Assert.assertEquals(Assert.java:67)48 at junit.framework.Assert.assertEquals(Assert.java:74)49 at com.example.junit.TestRunnerExample.testAdd(TestRunnerExample.java:21)50 at junit.framework.TestCase.runTest(TestCase.java:176)51 at junit.framework.TestCase.runBare(TestCase.java:141)52 at junit.framework.TestResult$1.protect(TestResult.java:122)53 at junit.framework.TestResult.runProtected(TestResult.java:142)54 at junit.framework.TestResult.run(TestResult.java:125)55 at junit.framework.TestCase.run(TestCase.java:129)56 at junit.framework.TestSuite.runTest(TestSuite.java:252)

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runSingleMethod

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1public class TestSingleMethod extends TestCase {2 public TestSingleMethod(String name) {3 super(name);4 }5 public void test1() {6 System.out.println("test1");7 }8 public void test2() {9 System.out.println("test2");10 }11 public static void main(String[] args) {12 TestRunner.runSingleMethod(TestSingleMethod.class, "test1", args);13 }14}15OK (1 test)16public class TestSuiteSingleMethod extends TestSuite {17 public TestSuiteSingleMethod() {18 addTest(new TestSingleMethod("test1"));19 addTest(new TestSingleMethod("test2"));20 }21 public static void main(String[] args) {22 TestRunner.run(new TestSuiteSingleMethod());23 }24}25OK (1 test)

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Had the same message. I had to remove the Run/Debug configuration.

In my case, I ran the unit test as a local test before. After that I moved my test to the androidTest package and tried to run it again. Android Studio remembered the last run configuration so it tried to run it again as a local unit test which produced the same error.

After removing the config and running the test again it generated a new configuration and worked.

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https://stackoverflow.com/questions/39282282/class-not-found-empty-test-suite-in-intellij

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