How to use loadSuiteClass method of junit.runner.BaseTestRunner class

Best junit code snippet using junit.runner.BaseTestRunner.loadSuiteClass

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...281 {282 return paramString;283 try284 {285 Class localClass = loadSuiteClass(paramString);286 try287 {288 String str;289 Object localObject = (Test)paramString.invoke(null, (Object[])new Class[0]);290 paramString = (String)localObject;291 if (localObject != null)292 {293 clearStatus();294 return (Test)localObject;295 }296 }297 catch (InvocationTargetException paramString)298 {299 runFailed("Failed to invoke suite():" + paramString.getTargetException().toString());300 return null;301 }302 catch (IllegalAccessException paramString)303 {304 runFailed("Failed to invoke suite():" + paramString.toString());305 }306 }307 catch (ClassNotFoundException localClassNotFoundException)308 {309 try310 {311 paramString = localClass.getMethod("suite", new Class[0]);312 if (Modifier.isStatic(paramString.getModifiers())) {313 break label141;314 }315 runFailed("Suite() method must be static");316 return null;317 }318 catch (Exception paramString)319 {320 clearStatus();321 return new TestSuite((Class)localObject);322 }323 localClassNotFoundException = localClassNotFoundException;324 str = localClassNotFoundException.getMessage();325 localObject = str;326 if (str == null) {327 localObject = paramString;328 }329 runFailed("Class not found \"" + (String)localObject + "\"");330 return null;331 }332 catch (Exception paramString)333 {334 runFailed("Error: " + paramString.toString());335 return null;336 }337 }338 label141:339 return null;340 }341 342 protected Class<?> loadSuiteClass(String paramString)343 throws ClassNotFoundException344 {345 return Class.forName(paramString);346 }347 348 protected String processArguments(String[] paramArrayOfString)349 {350 String str = null;351 int i = 0;352 if (i < paramArrayOfString.length)353 {354 if (paramArrayOfString[i].equals("-noloading")) {355 setLoading(false);356 }...

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...166 setInstrumentation(instrumentation);167 }168 /​* access modifiers changed from: protected */​169 @Override /​/​ junit.runner.BaseTestRunner170 public Class loadSuiteClass(String suiteClassName) throws ClassNotFoundException {171 return this.mContext.getClassLoader().loadClass(suiteClassName);172 }173 @Override /​/​ junit.runner.BaseTestRunner174 public void testStarted(String testName) {175 }176 @Override /​/​ junit.runner.BaseTestRunner177 public void testEnded(String testName) {178 }179 @Override /​/​ junit.runner.BaseTestRunner180 public void testFailed(int status, Test test, Throwable t) {181 }182 /​* access modifiers changed from: protected */​183 @Override /​/​ junit.runner.BaseTestRunner184 public void runFailed(String message) {...

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...114 }115 }116 /​* access modifiers changed from: protected */​117 public TestResult runSingleMethod(String testCase, String method, boolean wait) throws Exception {118 return doRun(TestSuite.createTest(loadSuiteClass(testCase).asSubclass(TestCase.class), method), wait);119 }120 /​* access modifiers changed from: protected */​121 @Override /​/​ junit.runner.BaseTestRunner122 public void runFailed(String message) {123 System.err.println(message);124 System.exit(1);125 }126 public void setPrinter(ResultPrinter printer) {127 this.fPrinter = printer;128 }129}...

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loadSuiteClass

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

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loadSuiteClass

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1 Class testSuiteClass = BaseTestRunner.loadSuiteClass(testSuiteClassName);2 Constructor testSuiteConstructor = testSuiteClass.getConstructor(String.class);3 Test testSuite = (Test) testSuiteConstructor.newInstance("Test Suite");4 TestResult testResult = new TestResult();5 testSuite.run(testResult);6 System.out.println("Number of test cases = " + testResult.runCount());7 System.out.println("Number of test failures = " + testResult.failureCount());8}

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loadSuiteClass

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1public class TestSuiteLoader extends BaseTestRunner {2 private static final String TEST_SUITE_CLASS_NAME = "org.junit.tests.AllTests";3 private static final String TEST_SUITE_METHOD_NAME = "suite";4 public static Test loadSuite() throws Exception {5 Class<?> testSuiteClass = loadSuiteClass(TEST_SUITE_CLASS_NAME);6 Method suiteMethod = testSuiteClass.getMethod(TEST_SUITE_METHOD_NAME, new Class[0]);7 return (Test) suiteMethod.invoke(null, new Object[0]);8 }9}10public class TestRunner {11 public static void main(String[] args) {12 try {13 TestRunner.run(TestSuiteLoader.loadSuite());14 } catch (Exception e) {15 e.printStackTrace();16 }17 }18}19public class SwingTestRunner {20 public static void main(String[] args) {21 try {22 junit.swingui.TestRunner.run(TestSuiteLoader.loadSuite());23 } catch (Exception e) {24 e.printStackTrace();25 }26 }27}28public class AWTTestRunner {29 public static void main(String[] args) {30 try {31 junit.awtui.TestRunner.run(TestSuiteLoader.loadSuite());32 } catch (Exception e) {33 e.printStackTrace();34 }35 }36}37public class AWTTestRunner {38 public static void main(String[] args) {39 try {40 junit.awtui.TestRunner.run(TestSuiteLoader.loadSuite());41 } catch (Exception e) {42 e.printStackTrace();43 }44 }45}46public class TestRunner {47 public static void main(String[] args) {48 try {49 TestRunner.run(TestSuiteLoader.loadSuite());50 } catch (Exception e) {51 e.printStackTrace();52 }53 }54}55public class SwingTestRunner {56 public static void main(String[] args) {57 try {58 junit.swingui.TestRunner.run(TestSuiteLoader.loadSuite());59 } catch (Exception e) {60 e.printStackTrace();61 }62 }63}

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loadSuiteClass

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1import junit.framework.Test;2import junit.framework.TestSuite;3public class TestSuiteExample {4 public static Test suite() throws Exception {5 Class<?> testSuiteClass = BaseTestRunner.loadSuiteClass("junit.framework.TestSuite");6 TestSuite testSuite = (TestSuite) testSuiteClass.getConstructor(Class.class).newInstance(TestSuiteExample.class);7 Test test = (Test) testSuiteClass.getMethod("getTest", String.class).invoke(testSuite, "test");8 int testCount = (int) testSuiteClass.getMethod("countTestCases").invoke(test);9 System.out.println("testCount: " + testCount);10 return test;11 }12 public void test() {13 System.out.println("test");14 }15}

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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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