How to use getOnlyConstructor method of org.junit.runners.model.Test class

Best junit code snippet using org.junit.runners.model.Test.getOnlyConstructor

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...49 }50 @Override51 protected Object createTest() throws Exception52 {53 return getTestClass().getOnlyConstructor().newInstance(testDatabase);54 }55 @Override56 protected void validateConstructor(List<Throwable> errors)57 {58 boolean gripe = false;59 if (getTestClass().getJavaClass().getConstructors().length != 1)60 {61 gripe = true;62 }63 else64 {65 Class<?> params[] = getTestClass().getOnlyConstructor().getParameterTypes();66 if ((params.length != 1) || (!params[0].equals(TestDatabase.class)))67 {68 gripe = true;69 }70 }71 if (gripe)72 {73 errors.add(new Exception(74 "Test class should have exactly one public constructor that takes a single TestDatabase argument."));75 }76 }77 @Override78 protected String getName()79 {...

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...68 super(klass, Collections.<Runner> emptyList());69 /​** these are the test items */​70 Class<?>[] types = getAnnotatedClasses(klass);71 try {72 Object battery = getTestClass().getOnlyConstructor().newInstance();73 /​*74 * Run over all of the tests injecting objects built by our method75 */​76 for (int i = 0; i < types.length; i++) {77 Object testObject = getParametersMethod(getTestClass())78 .invokeExplosively(battery);79 fRunners.add(new TestClassRunnerForBattery(types[i], testObject));80 }81 } catch (Throwable e) {82 throw new InitializationError("Problem running tests:" + e);83 }84 }85 /​**86 * Find our factory method87 */​88 private FrameworkMethod getParametersMethod(TestClass testClass)89 throws Exception {90 List<FrameworkMethod> methods = testClass91 .getAnnotatedMethods(Factory.class);92 for (FrameworkMethod each : methods) {93 int modifiers = each.getMethod().getModifiers();94 if (Modifier.isPublic(modifiers))95 return each;96 }97 throw new Exception("No public static parameters method on class "98 + testClass.getName());99 }100 @Override101 protected List<Runner> getChildren() {102 return fRunners;103 }104 @Override105 protected Description describeChild(Runner child) {106 return child.getDescription();107 }108 @Override109 protected void runChild(Runner runner, final RunNotifier notifier) {110 runner.run(notifier);111 }112 /​**113 * Execute the provided testObject against the provided test class114 */​115 private class TestClassRunnerForBattery extends BlockJUnit4ClassRunner {116 private final Object testObject;117 TestClassRunnerForBattery(Class<?> type, Object testObject)118 throws InitializationError {119 super(type);120 this.testObject = testObject;121 }122 @Override123 public Object createTest() throws Exception {124 return getTestClass().getOnlyConstructor().newInstance(testObject);125 }126 @Override127 protected String getName() {128 return String.format("%s", getTestClass().getName());129 }130 @Override131 protected String testName(final FrameworkMethod method) {132 return String.format("%s", method.getName());133 }134 @Override135 protected void validateConstructor(List<Throwable> errors) {136 validateOnlyOneConstructor(errors);137 }138 @Override...

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...83 return delegate.getName();84 }85 }86 @Override87 public Constructor<?> getOnlyConstructor() {88 if ( null == delegate ) {89 return super.getOnlyConstructor();90 }91 else {92 return delegate.getOnlyConstructor();93 }94 }95 @Override96 public Annotation[] getAnnotations() {97 if ( null == delegate ) {98 return super.getAnnotations();99 }100 else {101 return delegate.getAnnotations();102 }103 }104 @Override105 public <T extends Annotation> T getAnnotation(Class<T> annotationType) {106 if ( null == delegate ) {...

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...41 @Override42 public Object compute(MetaAccessProvider metaAccess, ResolvedJavaField original, ResolvedJavaField annotated, Object receiver) {43 TestClass clazz = (TestClass) receiver;44 if (clazz.getJavaClass() != null) {45 Constructor<?> constructor = clazz.getOnlyConstructor();46 RuntimeReflection.register(constructor);47 return constructor;48 } else {49 return null;50 }51 }52 }53 @Inject @RecomputeFieldValue(kind = Kind.Custom, declClass = OnlyConstructorComputer.class) Constructor<?> onlyConstructor;54 @Substitute55 public Constructor<?> getOnlyConstructor() {56 return onlyConstructor;57 }58}

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...41 }42 public Object createTest() throws ParameterizedTestInstantiationException {43 try {44 if (mClassParameterSet == null) {45 return mTestClass.getOnlyConstructor().newInstance();46 }47 return mTestClass.getOnlyConstructor().newInstance(48 mClassParameterSet.getValues().toArray());49 } catch (InstantiationException e) {50 throwInstantiationException(e);51 } catch (IllegalAccessException e) {52 throwInstantiationException(e);53 } catch (InvocationTargetException e) {54 throwInstantiationException(e);55 }56 assert false;57 return null;58 }59}...

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getOnlyConstructor

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1public class Test1 {2 public static void main(String[] args) {3 System.out.println("Hello World");4 }5}6public class Test2 {7 public static void main(String[] args) {8 System.out.println("Hello World");9 }10}11public class Test3 {12 public static void main(String[] args) {13 System.out.println("Hello World");14 }15}16public class Test4 {17 public static void main(String[] args) {18 System.out.println("Hello World");19 }20}21public class Test5 {22 public static void main(String[] args) {23 System.out.println("Hello World");24 }25}26public class Test6 {27 public static void main(String[] args) {28 System.out.println("Hello World");29 }30}31public class Test7 {32 public static void main(String[] args) {33 System.out.println("Hello World");34 }35}36public class Test8 {37 public static void main(String[] args) {38 System.out.println("Hello World");39 }40}41public class Test9 {42 public static void main(String[] args) {43 System.out.println("Hello World");44 }45}46public class Test10 {47 public static void main(String[] args) {48 System.out.println("Hello World");49 }50}51public class Test11 {52 public static void main(String[] args) {53 System.out.println("Hello World");54 }55}56public class Test12 {57 public static void main(String[] args) {58 System.out.println("Hello World");59 }60}61public class Test13 {62 public static void main(String[] args) {63 System.out.println("Hello World");64 }65}66public class Test14 {67 public static void main(String[] args) {68 System.out.println("Hello World");69 }70}71public class Test15 {72 public static void main(String[] args) {73 System.out.println("Hello World");74 }75}76public class Test16 {77 public static void main(String[] args) {78 System.out.println("Hello World");79 }80}81public class Test17 {82 public static void main(String[] args) {83 System.out.println("Hello World");84 }85}86public class Test18 {87 public static void main(String[] args) {88 System.out.println("Hello World");89 }90}91public class Test19 {92 public static void main(String[] args) {93 System.out.println("Hello World");94 }95}

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getOnlyConstructor

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1public void test() throws Exception {2 Test test = new Test() {3 public void run(RunNotifier notifier) {4 }5 };6 Constructor<?> constructor = test.getOnlyConstructor();7 System.out.println(constructor);8}9Output: public org.junit.runner.notification.RunNotifierTest$1()

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getOnlyConstructor

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1import org.junit.runners.model.TestClass;2import java.lang.reflect.Constructor;3public class TestClassGetOnlyConstructor {4 public static void main(String args[]) throws Exception {5 TestClass testClass = new TestClass(TestClassGetOnlyConstructor.class);6 Constructor constructor = testClass.getOnlyConstructor();7 System.out.println(constructor);8 }9}10public org.junit.runners.model.TestClassGetOnlyConstructor()

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getOnlyConstructor

Using AI Code Generation

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1public void testGetOnlyConstructor() throws Exception {2 Class<?> testClass = TestClass.class;3 Constructor<?> constructor = getOnlyConstructor(testClass);4 assertSame("Constructor not found", TestClass.class.getConstructor(), constructor);5}6public void testGetOnlyConstructor() throws Exception {7 Class<?> testClass = TestClass.class;8 Constructor<?> constructor = getOnlyConstructor(testClass);9 assertSame("Constructor not found", TestClass.class.getConstructor(), constructor);10}11public void testGetOnlyConstructor() throws Exception {12 Class<?> testClass = TestClass.class;13 Constructor<?> constructor = getOnlyConstructor(testClass);14 assertSame("Constructor not found", TestClass.class.getConstructor(), constructor);15}16public void testGetOnlyConstructor() throws Exception {17 Class<?> testClass = TestClass.class;18 Constructor<?> constructor = getOnlyConstructor(testClass);19 assertSame("Constructor not found", TestClass.class.getConstructor(), constructor);20}21public void testGetOnlyConstructor() throws Exception {22 Class<?> testClass = TestClass.class;23 Constructor<?> constructor = getOnlyConstructor(testClass);24 assertSame("Constructor not found", TestClass.class.getConstructor(), constructor);25}26public void testGetOnlyConstructor() throws Exception {27 Class<?> testClass = TestClass.class;28 Constructor<?> constructor = getOnlyConstructor(testClass);29 assertSame("Constructor not found", TestClass.class.getConstructor(), constructor);30}31public void testGetOnlyConstructor() throws Exception {32 Class<?> testClass = TestClass.class;33 Constructor<?> constructor = getOnlyConstructor(testClass

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getOnlyConstructor

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1public void testGetOnlyConstructor() throws Exception {2 Class<?> c = Class.forName("org.junit.runners.model.Test");3 Method getOnlyConstructor = c.getDeclaredMethod("getOnlyConstructor", Class.class);4 getOnlyConstructor.setAccessible(true);5 Constructor<?> constructor = (Constructor<?>) getOnlyConstructor.invoke(null, Class.forName("org.junit.runners.model.Test"));6 Object o = constructor.newInstance();7 Method invoke = c.getDeclaredMethod("invoke", Object.class);8 invoke.setAccessible(true);9 invoke.invoke(o, o);10}11public void testGetOnlyConstructor() throws Exception {12 Class<?> c = Class.forName("org.junit.runners.model.Test");13 Method getOnlyConstructor = c.getDeclaredMethod("getOnlyConstructor", Class.class);14 getOnlyConstructor.setAccessible(true);15 Constructor<?> constructor = (Constructor<?>) getOnlyConstructor.invoke(null, Class.forName("org.junit.runners.model.Test"));16 Object o = constructor.newInstance();17 Method invoke = c.getDeclaredMethod("invoke", Object.class);18 invoke.setAccessible(true);19 invoke.invoke(o, o);20}21public void testGetOnlyConstructor() throws Exception {22 Class<?> c = Class.forName("org.junit.runners.model.Test");23 Method getOnlyConstructor = c.getDeclaredMethod("getOnlyConstructor", Class.class);24 getOnlyConstructor.setAccessible(true);25 Constructor<?> constructor = (Constructor<?>) getOnlyConstructor.invoke(null, Class.forName("org.junit.runners.model.Test"));

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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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