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

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

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...297 throw paramTest;298 }299 }300 301 public String extractClassName(String paramString)302 {303 String str = paramString;304 if (paramString.startsWith("Default package for")) {305 str = paramString.substring(paramString.lastIndexOf(".") + 1);306 }307 return str;308 }309 310 public Test getTest(String paramString)311 {312 if (paramString.length() <= 0)313 {314 clearStatus();315 paramString = null;316 return paramString;317 }318 for (;;)319 {320 Object localObject;321 try322 {323 for (;;)324 {325 Class localClass = loadSuiteClass(paramString);326 try327 {328 localObject = (Test)paramString.invoke(null, new Object[0]);329 paramString = (String)localObject;330 if (localObject == null) {331 break;332 }333 clearStatus();334 return localObject;335 }336 catch (InvocationTargetException paramString)337 {338 runFailed("Failed to invoke suite():" + paramString.getTargetException().toString());339 return null;340 }341 catch (IllegalAccessException paramString)342 {343 runFailed("Failed to invoke suite():" + paramString.toString());344 return null;345 }346 }347 }348 catch (ClassNotFoundException localClassNotFoundException)349 {350 try351 {352 paramString = localClass.getMethod("suite", new Class[0]);353 if (Modifier.isStatic(paramString.getModifiers())) {354 break label137;355 }356 runFailed("Suite() method must be static");357 return null;358 }359 catch (Exception paramString)360 {361 clearStatus();362 return new TestSuite((Class)localObject);363 }364 localClassNotFoundException = localClassNotFoundException;365 localObject = localClassNotFoundException.getMessage();366 if (localObject == null)367 {368 runFailed("Class not found \"" + paramString + "\"");369 return null;370 }371 }372 catch (Exception paramString)373 {374 runFailed("Error: " + paramString.toString());375 return null;376 }377 label137:378 paramString = (String)localObject;379 }380 }381 382 protected Class<?> loadSuiteClass(String paramString)383 throws ClassNotFoundException384 {385 return Class.forName(paramString);386 }387 388 protected String processArguments(String[] paramArrayOfString)389 {390 String str = null;391 int i = 0;392 if (i < paramArrayOfString.length)393 {394 if (paramArrayOfString[i].equals("-noloading")) {395 setLoading(false);396 }397 for (;;)398 {399 i += 1;400 break;401 if (paramArrayOfString[i].equals("-nofilterstack"))402 {403 fgFilterStack = false;404 }405 else406 {407 if (paramArrayOfString[i].equals("-c"))408 {409 if (paramArrayOfString.length > i + 1) {410 str = extractClassName(paramArrayOfString[(i + 1)]);411 }412 for (;;)413 {414 i += 1;415 break;416 System.out.println("Missing Test class name");417 }418 }419 str = paramArrayOfString[i];420 }421 }422 }423 return str;424 } ...

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...84 if (args[i].equals("-wait")) {85 wait = true;86 } else if (args[i].equals("-c")) {87 i++;88 testCase = extractClassName(args[i]);89 } else if (args[i].equals("-m")) {90 i++;91 String arg = args[i];92 int lastIndex = arg.lastIndexOf(46);93 testCase = arg.substring(0, lastIndex);94 method = arg.substring(lastIndex + 1);95 } else if (args[i].equals("-v")) {96 PrintStream printStream = System.err;97 printStream.println("JUnit " + Version.id() + " by Kent Beck and Erich Gamma");98 } else {99 testCase = args[i];100 }101 i++;102 }...

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1import java.io.File;2import java.io.FileInputStream;3import java.io.FileNotFoundException;4import java.io.IOException;5import java.io.InputStream;6import java.lang.reflect.InvocationTargetException;7import java.lang.reflect.Method;8import java.lang.reflect.Modifier;9import java.util.Enumeration;10import java.util.Properties;11import java.util.Vector;12import junit.framework.AssertionFailedError;13import junit.framework.Protectable;14import junit.framework.Test;15import junit.framework.TestListener;16import junit.framework.TestResult;17import junit.framework.TestSuite;18import junit.runner.BaseTestRunner;19public class TestRunner extends BaseTestRunner {20 public static final String SUITE_METHODNAME = "suite";21 private static ClassLoader fgLoader = null;22 private static boolean fgUseReloadingTestSuiteLoader = false;23 private static boolean fgStop = false;24 private static boolean fgFilterStack = false;25 private static boolean fgLoading = true;26 private static boolean fgLoadingDone = false;27 private static boolean fgClearStatus = false;28 private static boolean fgShowTestHierarchy = false;29 private static boolean fgUseLoadingRunner = false;30 private static boolean fgUseNewStyle = false;31 private static boolean fgUseOldStyle = false;32 private static boolean fgUseCustomRunner = false;33 private static boolean fgUseCustomLoader = false;34 private static boolean fgUseCustomTestSuiteLoader = false;35 private static boolean fgUseCustomTestLoader = false;36 private static boolean fgUseCustomTestDecorator = false;37 private static boolean fgUseCustomTestDecoratorLoader = false;38 private static boolean fgUseCustomTestDecoratorLoader2 = false;39 private static boolean fgUseCustomTestDecoratorLoader3 = false;40 private static boolean fgUseCustomTestDecoratorLoader4 = false;41 private static boolean fgUseCustomTestDecoratorLoader5 = false;42 private static boolean fgUseCustomTestDecoratorLoader6 = false;43 private static boolean fgUseCustomTestDecoratorLoader7 = false;44 private static boolean fgUseCustomTestDecoratorLoader8 = false;45 private static boolean fgUseCustomTestDecoratorLoader9 = false;46 private static boolean fgUseCustomTestDecoratorLoader10 = false;47 private static boolean fgUseCustomTestDecoratorLoader11 = false;48 private static boolean fgUseCustomTestDecoratorLoader12 = false;49 private static boolean fgUseCustomTestDecoratorLoader13 = false;

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1import java.lang.reflect.*;2import java.util.*;3public class TestSuiteName {4 public static void main(String[] args) {5 String testSuiteName = "org.apache.derbyTesting.functionTests.tests.jdbcapi.DatabaseMetaDataTest";6 String testClassName = BaseTestRunner.extractClassName(testSuiteName);7 System.out.println("testClassName: " + testClassName);8 String testSuiteNameFromCache = BaseTestRunner.getTestSuiteCache().get(testClassName);9 System.out.println("testSuiteNameFromCache: " + testSuiteNameFromCache);10 }11}

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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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