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How to use performMethodInvocation method of org.powermock.reflect.internal.WhiteboxImpl class

Best Powermock code snippet using org.powermock.reflect.internal.WhiteboxImpl.performMethodInvocation

Source:WhiteboxImpl.java

...580		Method method = getMethod(unmockedType, methodToExecute, argumentTypes);581		if (method == null) {582			throwExceptionIfMethodWasNotFound(unmockedType, methodToExecute, null, arguments);583		}584		return (T) performMethodInvocation(tested, method, arguments);585	}586	/**587	 * Invoke a private or inner class method in a subclass (defined by588	 * <code>definedIn</code>) in cases where power mock cannot automatically589	 * determine the type of the parameters, for example when mixing primitive590	 * types and wrapper types in the same method. For most situations use591	 * {@link #invokeMethod(Class, String, Object...)} instead.592	 * 593	 * @throws Exception594	 *             Exception that may occur when invoking this method.595	 */596	@SuppressWarnings("unchecked")597	public static synchronized <T> T invokeMethod(Object tested, String methodToExecute, Class<?> definedIn, Class<?>[] argumentTypes,598			Object... arguments) throws Exception {599		Method method = getMethod(definedIn, methodToExecute, argumentTypes);600		if (method == null) {601			throwExceptionIfMethodWasNotFound(definedIn, methodToExecute, null, arguments);602		}603		return (T) performMethodInvocation(tested, method, arguments);604	}605	/**606	 * Invoke a private or inner class method in that is located in a subclass607	 * of the tested instance. This might be useful to test private methods.608	 * 609	 * @throws Exception610	 *             Exception that may occur when invoking this method.611	 */612	@SuppressWarnings("unchecked")613	public static synchronized <T> T invokeMethod(Object tested, Class<?> declaringClass, String methodToExecute, Object... arguments)614			throws Exception {615		return (T) doInvokeMethod(tested, declaringClass, methodToExecute, arguments);616	}617	/**618	 * Invoke a private method in that is located in a subclass of an instance.619	 * This might be useful to test overloaded private methods.620	 * <p>621	 * Use this for overloaded methods only, if possible use622	 * {@link #invokeMethod(Object, Object...)} or623	 * {@link #invokeMethod(Object, String, Object...)} instead.624	 * 625	 * @throws Exception626	 *             Exception that may occur when invoking this method.627	 */628	@SuppressWarnings("unchecked")629	public static synchronized <T> T invokeMethod(Object object, Class<?> declaringClass, String methodToExecute, Class<?>[] parameterTypes,630			Object... arguments) throws Exception {631		if (object == null) {632			throw new IllegalArgumentException("object cannot be null");633		}634		final Method methodToInvoke = getMethod(declaringClass, methodToExecute, parameterTypes);635		// Invoke method636		return (T) performMethodInvocation(object, methodToInvoke, arguments);637	}638	/**639	 * Invoke a private or inner class method. This might be useful to test640	 * private methods.641	 * 642	 */643	@SuppressWarnings("unchecked")644	public static synchronized <T> T invokeMethod(Class<?> clazz, String methodToExecute, Object... arguments) throws Exception {645		return (T) doInvokeMethod(clazz, null, methodToExecute, arguments);646	}647	@SuppressWarnings("unchecked")648	private static <T> T doInvokeMethod(Object tested, Class<?> declaringClass, String methodToExecute, Object... arguments) throws Exception {649		Method methodToInvoke = findMethodOrThrowException(tested, declaringClass, methodToExecute, arguments);650		// Invoke test651		return (T) performMethodInvocation(tested, methodToInvoke, arguments);652	}653	/**654	 * Finds and returns a certain method. If the method couldn't be found this655	 * method delegates to656	 * {@link WhiteboxImpl#throwExceptionIfMethodWasNotFound(Object, String, Method, Object...)}657	 * .658	 * 659	 * @param tested660	 *            The instance or class containing the method.661	 * @param declaringClass662	 *            The class where the method is supposed to be declared (may be663	 *            <code>null</code>).664	 * @param methodToExecute665	 *            The method name. If <code>null</code> then method will be666	 *            looked up based on the argument types only.667	 * @param arguments668	 *            The arguments of the methods.669	 * @return A single method.670	 */671	public static Method findMethodOrThrowException(Object tested, Class<?> declaringClass, String methodToExecute, Object[] arguments) {672		if (tested == null) {673			throw new IllegalArgumentException("The object to perform the operation on cannot be null.");674		}675		/*676		 * Get methods from the type if it's not mocked or from the super type677		 * if the tested object is mocked.678		 */679		Class<?> testedType = null;680		if (isClass(tested)) {681			testedType = (Class<?>) tested;682		} else {683			testedType = tested.getClass();684		}685		Method[] methods = null;686		if (declaringClass == null) {687			methods = getAllMethods(testedType);688		} else {689			methods = declaringClass.getDeclaredMethods();690		}691		Method potentialMethodToInvoke = null;692		for (Method method : methods) {693			if (methodToExecute == null || method.getName().equals(methodToExecute)) {694				Class<?>[] paramTypes = method.getParameterTypes();695				if ((arguments != null && (paramTypes.length == arguments.length))) {696					if (paramTypes.length == 0) {697						potentialMethodToInvoke = method;698						break;699					}700					boolean wrappedMethodFound = true;701					boolean primitiveMethodFound = true;702					if (!checkIfTypesAreSame(paramTypes, arguments)) {703						wrappedMethodFound = false;704					}705					if (!checkIfTypesAreSame(paramTypes, convertArgumentTypesToPrimitive(paramTypes, arguments))) {706						primitiveMethodFound = false;707					}708					if (wrappedMethodFound || primitiveMethodFound) {709						if (potentialMethodToInvoke == null) {710							potentialMethodToInvoke = method;711						} else {712							/*713							 * We've already found a method match before, this714							 * means that PowerMock cannot determine which715							 * method to expect since there are two methods with716							 * the same name and the same number of arguments717							 * but one is using wrapper types.718							 */719							throwExceptionWhenMultipleMethodMatchesFound("argument parameter types", new Method[] { potentialMethodToInvoke, method });720						}721					}722				} else if (isPotentialVarArgsMethod(method, arguments)) {723					if (potentialMethodToInvoke == null) {724						potentialMethodToInvoke = method;725					} else {726						/*727						 * We've already found a method match before, this means728						 * that PowerMock cannot determine which method to729						 * expect since there are two methods with the same name730						 * and the same number of arguments but one is using731						 * wrapper types.732						 */733						throwExceptionWhenMultipleMethodMatchesFound("argument parameter types", new Method[] { potentialMethodToInvoke, method });734					}735					break;736				} else if (arguments != null && (paramTypes.length != arguments.length)) {737					continue;738				}739			}740		}741		WhiteboxImpl.throwExceptionIfMethodWasNotFound(getType(tested), methodToExecute, potentialMethodToInvoke, arguments);742		return potentialMethodToInvoke;743	}744/**745	 * Finds and returns a certain constructor. If the constructor couldn't be746	 * found this method delegates to747	 * {@link Whitebox#throwExceptionIfConstructorWasNotFound(Class, Object...).748	 * 749	 * @param type The type where the constructor should be located. 750	 * @param arguments The arguments passed to the constructor. 751 	 * @return The found constructor.752 	 * @throws TooManyConstructorsFoundException If too many constructors matched.753 	 * @throws ConstructorNotFoundException If no constructor matched. 754	 */755	public static Constructor<?> findConstructorOrThrowException(Class<?> type) {756		final Constructor<?>[] declaredConstructors = filterPowerMockConstructor(type.getDeclaredConstructors());757		if (declaredConstructors.length > 1) {758			throwExceptionWhenMultipleConstructorMatchesFound(declaredConstructors);759		}760		return declaredConstructors[0];761	}762	private static Constructor<?>[] filterPowerMockConstructor(Constructor<?>[] declaredConstructors) {763		Set<Constructor<?>> constructors = new HashSet<Constructor<?>>();764		for (Constructor<?> constructor : declaredConstructors) {765			final Class<?>[] parameterTypes = constructor.getParameterTypes();766			if (parameterTypes.length == 1 && parameterTypes[0].getName().equals("org.powermock.core.IndicateReloadClass")) {767				continue;768			} else {769				constructors.add(constructor);770			}771		}772		return constructors.toArray(new Constructor<?>[constructors.size()]);773	}774/**775	 * Finds and returns a certain constructor. If the constructor couldn't be776	 * found this method delegates to777	 * {@link Whitebox#throwExceptionIfConstructorWasNotFound(Class, Object...).778	 * 779	 * @param type The type where the constructor should be located. 780	 * @param arguments The arguments passed to the constructor. 781 	 * @return The found constructor.782 	 * @throws TooManyConstructorsFoundException If too many constructors matched.783 	 * @throws ConstructorNotFoundException If no constructor matched. 784	 */785	public static Constructor<?> findUniqueConstructorOrThrowException(Class<?> type, Object... arguments) {786		if (type == null) {787			throw new IllegalArgumentException("Class type cannot be null.");788		}789		Class<?> unmockedType = getUnmockedType(type);790		if ((unmockedType.isLocalClass() || unmockedType.isAnonymousClass() || unmockedType.isMemberClass())791				&& !Modifier.isStatic(unmockedType.getModifiers()) && arguments != null) {792			Object[] argumentsForLocalClass = new Object[arguments.length + 1];793			argumentsForLocalClass[0] = unmockedType.getEnclosingClass();794			System.arraycopy(arguments, 0, argumentsForLocalClass, 1, arguments.length);795			arguments = argumentsForLocalClass;796		}797		Constructor<?>[] constructors = unmockedType.getDeclaredConstructors();798		Constructor<?> potentialConstructor = null;799		for (Constructor<?> constructor : constructors) {800			Class<?>[] paramTypes = constructor.getParameterTypes();801			if ((arguments != null && (paramTypes.length == arguments.length))) {802				if (paramTypes.length == 0) {803					potentialConstructor = constructor;804					break;805				}806				boolean wrappedConstructorFound = true;807				boolean primitiveConstructorFound = true;808				if (!checkIfTypesAreSame(paramTypes, arguments)) {809					wrappedConstructorFound = false;810				}811				if (!checkIfTypesAreSame(paramTypes, convertArgumentTypesToPrimitive(paramTypes, arguments))) {812					primitiveConstructorFound = false;813				}814				if (wrappedConstructorFound || primitiveConstructorFound) {815					if (potentialConstructor == null) {816						potentialConstructor = constructor;817					} else {818						/*819						 * We've already found a constructor match before, this820						 * means that PowerMock cannot determine which method to821						 * expect since there are two methods with the same name822						 * and the same number of arguments but one is using823						 * wrapper types.824						 */825						throwExceptionWhenMultipleConstructorMatchesFound(new Constructor<?>[] { potentialConstructor, constructor });826					}827				}828			} else if (isPotentialVarArgsConstructor(constructor, arguments)) {829				if (potentialConstructor == null) {830					potentialConstructor = constructor;831				} else {832					/*833					 * We've already found a constructor match before, this834					 * means that PowerMock cannot determine which method to835					 * expect since there are two methods with the same name and836					 * the same number of arguments but one is using wrapper837					 * types.838					 */839					throwExceptionWhenMultipleConstructorMatchesFound(new Constructor<?>[] { potentialConstructor, constructor });840				}841				break;842			} else if (arguments != null && (paramTypes.length != arguments.length)) {843				continue;844			}845		}846		WhiteboxImpl.throwExceptionIfConstructorWasNotFound(type, potentialConstructor, arguments);847		return potentialConstructor;848	}849	private static Class<?>[] convertArgumentTypesToPrimitive(Class<?>[] paramTypes, Object[] arguments) {850		Class<?>[] types = new Class<?>[arguments.length];851		for (int i = 0; i < arguments.length; i++) {852			Class<?> argumentType = null;853			if (arguments[i] == null) {854				argumentType = paramTypes[i];855			} else {856				argumentType = getType(arguments[i]);857			}858			Class<?> primitiveWrapperType = PrimitiveWrapper.getPrimitiveFromWrapperType(argumentType);859			if (primitiveWrapperType == null) {860				types[i] = argumentType;861			} else {862				types[i] = primitiveWrapperType;863			}864		}865		return types;866	}867	public static void throwExceptionIfMethodWasNotFound(Class<?> type, String methodName, Method methodToMock, Object... arguments) {868		if (methodToMock == null) {869			String methodNameData = "";870			if (methodName != null) {871				methodNameData = "with name '" + methodName + "' ";872			}873			throw new MethodNotFoundException("No method found " + methodNameData + "with parameter types: [ " + getArgumentTypesAsString(arguments)874					+ " ] in class " + getUnmockedType(type).getName() + ".");875		}876	}877	public static void throwExceptionIfFieldWasNotFound(Class<?> type, String fieldName, Field field) {878		if (field == null) {879			throw new FieldNotFoundException("No field was found with name '" + fieldName + "' in class " + getUnmockedType(type).getName() + ".");880		}881	}882	static void throwExceptionIfConstructorWasNotFound(Class<?> type, Constructor<?> potentialConstructor, Object... arguments) {883		if (potentialConstructor == null) {884			String message = "No constructor found in class '" + getUnmockedType(type).getName() + "' with " + "parameter types: [ "885					+ getArgumentTypesAsString(arguments) + " ].";886			throw new ConstructorNotFoundException(message);887		}888	}889	private static String getArgumentTypesAsString(Object... arguments) {890		StringBuilder argumentsAsString = new StringBuilder();891		final String noParameters = "<none>";892		if (arguments != null && arguments.length != 0) {893			for (int i = 0; i < arguments.length; i++) {894				String argumentName = null;895				Object argument = arguments[i];896				if (argument instanceof Class<?>) {897					argumentName = ((Class<?>) argument).getName();898				} else if (argument instanceof Class<?>[] && arguments.length == 1) {899					Class<?>[] argumentArray = (Class<?>[]) argument;900					if (argumentArray.length > 0) {901						for (int j = 0; j < argumentArray.length; j++) {902							appendArgument(argumentsAsString, j, argumentArray[j] == null ? "null" : getType(argumentArray[j]).getName(),903									argumentArray);904						}905						return argumentsAsString.toString();906					} else {907						argumentName = noParameters;908					}909				} else if (argument == null) {910					argumentName = "null";911				} else {912					argumentName = getType(argument).getName();913				}914				appendArgument(argumentsAsString, i, argumentName, arguments);915			}916		} else {917			argumentsAsString.append("<none>");918		}919		return argumentsAsString.toString();920	}921	private static void appendArgument(StringBuilder argumentsAsString, int index, String argumentName, Object[] arguments) {922		argumentsAsString.append(argumentName);923		if (index != arguments.length - 1) {924			argumentsAsString.append(", ");925		}926	}927	/**928	 * Invoke a constructor. Useful for testing classes with a private929	 * constructor when PowerMock cannot determine which constructor to invoke.930	 * This only happens if you have two constructors with the same number of931	 * arguments where one is using primitive data types and the other is using932	 * the wrapped counter part. For example:933	 * 934	 * <pre>935	 * public class MyClass {936	 *     private MyClass(Integer i) {937	 *         ...938	 *     } 939	 * 940	 *     private MyClass(int i) {941	 *         ...942	 *     }943	 * </pre>944	 * 945	 * This ought to be a really rare case. So for most situation, use946	 * {@link #invokeConstructor(Class, Object...)} instead.947	 * 948	 * 949	 * @return The object created after the constructor has been invoked.950	 * @throws Exception951	 *             If an exception occur when invoking the constructor.952	 */953	public static <T> T invokeConstructor(Class<T> classThatContainsTheConstructorToTest, Class<?>[] parameterTypes, Object[] arguments)954			throws Exception {955		if (parameterTypes != null && arguments != null) {956			if (parameterTypes.length != arguments.length) {957				throw new IllegalArgumentException("parameterTypes and arguments must have the same length");958			}959		}960		Constructor<T> constructor = null;961		try {962			constructor = classThatContainsTheConstructorToTest.getDeclaredConstructor(parameterTypes);963		} catch (Exception e) {964			throw new ConstructorNotFoundException("Could not lookup the constructor", e);965		}966		return createInstance(constructor, arguments);967	}968	/**969	 * Invoke a constructor. Useful for testing classes with a private970	 * constructor.971	 * 972	 * 973	 * @return The object created after the constructor has been invoked.974	 * @throws Exception975	 *             If an exception occur when invoking the constructor.976	 */977	public static <T> T invokeConstructor(Class<T> classThatContainsTheConstructorToTest, Object... arguments) throws Exception {978		if (classThatContainsTheConstructorToTest == null) {979			throw new IllegalArgumentException("The class should contain the constructor cannot be null.");980		}981		Class<?>[] argumentTypes = null;982		if (arguments == null) {983			argumentTypes = new Class<?>[0];984		} else {985			argumentTypes = new Class<?>[arguments.length];986			for (int i = 0; i < arguments.length; i++) {987				argumentTypes[i] = getType(arguments[i]);988			}989		}990		Constructor<T> constructor = null;991		Constructor<T> potentialContstructorWrapped = null;992		Constructor<T> potentialContstructorPrimitive = null;993		try {994			potentialContstructorWrapped = classThatContainsTheConstructorToTest.getDeclaredConstructor(argumentTypes);995		} catch (Exception e) {996			// Do nothing, we'll try with primitive type next.997		}998		try {999			potentialContstructorPrimitive = classThatContainsTheConstructorToTest.getDeclaredConstructor(PrimitiveWrapper1000					.toPrimitiveType(argumentTypes));1001		} catch (Exception e) {1002			// Do nothing1003		}1004		if (potentialContstructorPrimitive == null && potentialContstructorWrapped == null) {1005			// Check if we can find a matching var args constructor.1006			constructor = getPotentialVarArgsConstructor(classThatContainsTheConstructorToTest, arguments);1007			if (constructor == null) {1008				throw new ConstructorNotFoundException("Failed to find a constructor with parameter types: [" + getArgumentTypesAsString(arguments)1009						+ "]");1010			}1011		} else if (potentialContstructorPrimitive == null && potentialContstructorWrapped != null) {1012			constructor = potentialContstructorWrapped;1013		} else if (potentialContstructorPrimitive != null && potentialContstructorWrapped == null) {1014			constructor = potentialContstructorPrimitive;1015		} else if (arguments == null || arguments.length == 0 && potentialContstructorPrimitive != null) {1016			constructor = potentialContstructorPrimitive;1017		} else {1018			throw new TooManyConstructorsFoundException(1019					"Could not determine which constructor to execute. Please specify the parameter types by hand.");1020		}1021		return createInstance(constructor, arguments);1022	}1023	@SuppressWarnings("unchecked")1024	private static <T> Constructor<T> getPotentialVarArgsConstructor(Class<T> classThatContainsTheConstructorToTest, Object... arguments) {1025		if (areAllArgumentsOfSameType(arguments)) {1026			Constructor<T>[] declaredConstructors = (Constructor<T>[]) classThatContainsTheConstructorToTest.getDeclaredConstructors();1027			for (Constructor<T> possibleVarArgsConstructor : declaredConstructors) {1028				if (possibleVarArgsConstructor.isVarArgs()) {1029					if (arguments == null || arguments.length == 0) {1030						return possibleVarArgsConstructor;1031					} else {1032						Class<?>[] parameterTypes = possibleVarArgsConstructor.getParameterTypes();1033						if (parameterTypes[parameterTypes.length - 1].getComponentType().isAssignableFrom(getType(arguments[0]))) {1034							return possibleVarArgsConstructor;1035						}1036					}1037				}1038			}1039		}1040		return null;1041	}1042	private static <T> T createInstance(Constructor<T> constructor, Object... arguments) throws Exception {1043		if (constructor == null) {1044			throw new IllegalArgumentException("Constructor cannot be null");1045		}1046		constructor.setAccessible(true);1047		T createdObject = null;1048		try {1049			if (constructor.isVarArgs()) {1050				Class<?>[] parameterTypes = constructor.getParameterTypes();1051				final int varArgsIndex = parameterTypes.length - 1;1052				Class<?> varArgsType = parameterTypes[varArgsIndex].getComponentType();1053				Object varArgsArrayInstance = createAndPopulateVarArgsArray(varArgsType, varArgsIndex, arguments);1054				Object[] completeArgumentList = new Object[parameterTypes.length];1055				for (int i = 0; i < varArgsIndex; i++) {1056					completeArgumentList[i] = arguments[i];1057				}1058				completeArgumentList[completeArgumentList.length - 1] = varArgsArrayInstance;1059				createdObject = constructor.newInstance(completeArgumentList);1060			} else {1061				createdObject = constructor.newInstance(arguments);1062			}1063		} catch (InvocationTargetException e) {1064			Throwable cause = e.getCause();1065			if (cause instanceof Exception) {1066				throw (Exception) cause;1067			} else if (cause instanceof Error) {1068				throw (Error) cause;1069			}1070		}1071		return createdObject;1072	}1073	private static Object createAndPopulateVarArgsArray(Class<?> varArgsType, int varArgsStartPosition, Object... arguments) {1074		Object arrayInstance = Array.newInstance(varArgsType, arguments.length - varArgsStartPosition);1075		for (int i = varArgsStartPosition; i < arguments.length; i++) {1076			Array.set(arrayInstance, i - varArgsStartPosition, arguments[i]);1077		}1078		return arrayInstance;1079	}1080	/**1081	 * Get all methods in a class hierarchy! Both declared an non-declared (no1082	 * duplicates).1083	 * 1084	 * @param clazz1085	 *            The class whose methods to get.1086	 * @return All methods declared in this class hierarchy.1087	 */1088	public static Method[] getAllMethods(Class<?> clazz) {1089		if (clazz == null) {1090			throw new IllegalArgumentException("You must specify a class in order to get the methods.");1091		}1092		Set<Method> methods = new LinkedHashSet<Method>();1093		Class<?> thisType = clazz;1094		while (thisType != null) {1095			final Class<?> type = thisType;1096			final Method[] declaredMethods = AccessController.doPrivileged(new PrivilegedAction<Method[]>() {1097				public Method[] run() {1098					return type.getDeclaredMethods();1099				}1100			});1101			for (Method method : declaredMethods) {1102				method.setAccessible(true);1103				methods.add(method);1104			}1105			thisType = thisType.getSuperclass();1106		}1107		return methods.toArray(new Method[0]);1108	}1109	/**1110	 * Get all public methods for a class (no duplicates)! Note that the1111	 * class-hierarchy will not be traversed.1112	 * 1113	 * @param clazz1114	 *            The class whose methods to get.1115	 * @return All public methods declared in <tt>this</tt> class.1116	 */1117	private static Method[] getAllPublicMethods(Class<?> clazz) {1118		if (clazz == null) {1119			throw new IllegalArgumentException("You must specify a class in order to get the methods.");1120		}1121		Set<Method> methods = new LinkedHashSet<Method>();1122		for (Method method : clazz.getMethods()) {1123			method.setAccessible(true);1124			methods.add(method);1125		}1126		return methods.toArray(new Method[0]);1127	}1128	/**1129	 * Get all fields in a class hierarchy! Both declared an non-declared (no1130	 * duplicates).1131	 * 1132	 * @param clazz1133	 *            The class whose fields to get.1134	 * @return All fields declared in this class hierarchy.1135	 */1136	public static Field[] getAllFields(Class<?> clazz) {1137		if (clazz == null) {1138			throw new IllegalArgumentException("You must specify the class that contains the fields");1139		}1140		Set<Field> fields = new LinkedHashSet<Field>();1141		Class<?> thisType = clazz;1142		while (thisType != null) {1143			final Field[] declaredFields = thisType.getDeclaredFields();1144			for (Field field : declaredFields) {1145				field.setAccessible(true);1146				fields.add(field);1147			}1148			thisType = thisType.getSuperclass();1149		}1150		return fields.toArray(new Field[fields.size()]);1151	}1152	/**1153	 * Get the first parent constructor defined in a super class of1154	 * <code>klass</code>.1155	 * 1156	 * @param klass1157	 *            The class where the constructor is located. <code>null</code>1158	 *            ).1159	 * @return A <code>java.lang.reflect.Constructor</code>.1160	 */1161	public static Constructor<?> getFirstParentConstructor(Class<?> klass) {1162		try {1163			return getUnmockedType(klass).getSuperclass().getDeclaredConstructors()[0];1164		} catch (Exception e) {1165			throw new ConstructorNotFoundException("Failed to lookup constructor.", e);1166		}1167	}1168	/**1169	 * Finds and returns a method based on the input parameters. If no1170	 * <code>parameterTypes</code> are present the method will return the first1171	 * method with name <code>methodNameToMock</code>. If no method was found,1172	 * <code>null</code> will be returned. If no <code>methodName</code> is1173	 * specified the method will be found based on the parameter types. If1174	 * neither method name nor parameters are specified an1175	 * {@link IllegalArgumentException} will be thrown.1176	 * 1177	 * @param <T>1178	 * @param type1179	 * @param methodName1180	 * @param parameterTypes1181	 * @return1182	 */1183	public static <T> Method findMethod(Class<T> type, String methodName, Class<?>... parameterTypes) {1184		if (methodName == null && parameterTypes == null) {1185			throw new IllegalArgumentException("You must specify a method name or parameter types.");1186		}1187		List<Method> matchingMethodsList = new LinkedList<Method>();1188		for (Method method : getAllMethods(type)) {1189			if (methodName == null || method.getName().equals(methodName)) {1190				if (parameterTypes != null && parameterTypes.length > 0) {1191					// If argument types was supplied, make sure that they1192					// match.1193					Class<?>[] paramTypes = method.getParameterTypes();1194					if (!checkIfTypesAreSame(parameterTypes, paramTypes)) {1195						continue;1196					}1197				}1198				// Add the method to the matching methods list.1199				matchingMethodsList.add(method);1200			}1201		}1202		Method methodToMock = null;1203		if (matchingMethodsList.size() > 0) {1204			if (matchingMethodsList.size() == 1) {1205				// We've found a unique method match.1206				methodToMock = matchingMethodsList.get(0);1207			} else if (parameterTypes.length == 0) {1208				/*1209				 * If we've found several matches and we've supplied no1210				 * parameter types, go through the list of found methods and see1211				 * if we have a method with no parameters. In that case return1212				 * that method.1213				 */1214				for (Method method : matchingMethodsList) {1215					if (method.getParameterTypes().length == 0) {1216						methodToMock = method;1217						break;1218					}1219				}1220				if (methodToMock == null) {1221					WhiteboxImpl.throwExceptionWhenMultipleMethodMatchesFound("argument parameter types", matchingMethodsList.toArray(new Method[0]));1222				}1223			} else {1224				// We've found several matching methods.1225				WhiteboxImpl.throwExceptionWhenMultipleMethodMatchesFound("argument parameter types", matchingMethodsList.toArray(new Method[0]));1226			}1227		}1228		return methodToMock;1229	}1230	public static boolean isProxy(Class<?> type) {1231		return proxyFramework.isProxy(type);1232	}1233	public static <T> Class<?> getUnmockedType(Class<T> type) {1234		if (type == null) {1235			throw new IllegalArgumentException("type cannot be null");1236		}1237		Class<?> unmockedType = null;1238		if (proxyFramework != null && proxyFramework.isProxy(type)) {1239			unmockedType = proxyFramework.getUnproxiedType(type);1240		} else if (Proxy.isProxyClass(type)) {1241			unmockedType = type.getInterfaces()[0];1242		} else {1243			unmockedType = type;1244		}1245		return unmockedType;1246	}1247	static void throwExceptionWhenMultipleMethodMatchesFound(String helpInfo, Method[] methods) {1248		if (methods == null || methods.length < 2) {1249			throw new IllegalArgumentException("Internal error: throwExceptionWhenMultipleMethodMatchesFound needs at least two methods.");1250		}1251		StringBuilder sb = new StringBuilder();1252		sb.append("Several matching methods found, please specify the ");1253		sb.append(helpInfo);1254		sb.append(" so that PowerMock can determine which method you're refering to.\n");1255		sb.append("Matching methods in class ").append(methods[0].getDeclaringClass().getName()).append(" were:\n");1256		for (Method method : methods) {1257			sb.append(method.getReturnType().getName()).append(" ");1258			sb.append(method.getName()).append("( ");1259			final Class<?>[] parameterTypes = method.getParameterTypes();1260			for (Class<?> paramType : parameterTypes) {1261				sb.append(paramType.getName()).append(".class ");1262			}1263			sb.append(")\n");1264		}1265		throw new TooManyMethodsFoundException(sb.toString());1266	}1267	static void throwExceptionWhenMultipleConstructorMatchesFound(Constructor<?>[] constructors) {1268		if (constructors == null || constructors.length < 2) {1269			throw new IllegalArgumentException("Internal error: throwExceptionWhenMultipleConstructorMatchesFound needs at least two constructors.");1270		}1271		StringBuilder sb = new StringBuilder();1272		sb1273				.append("Several matching constructors found, please specify the argument parameter types so that PowerMock can determine which method you're refering to.\n");1274		sb.append("Matching constructors in class ").append(constructors[0].getDeclaringClass().getName()).append(" were:\n");1275		for (Constructor<?> constructor : constructors) {1276			sb.append(constructor.getName()).append("( ");1277			final Class<?>[] parameterTypes = constructor.getParameterTypes();1278			for (Class<?> paramType : parameterTypes) {1279				sb.append(paramType.getName()).append(".class ");1280			}1281			sb.append(")\n");1282		}1283		throw new TooManyConstructorsFoundException(sb.toString());1284	}1285	@SuppressWarnings("all")1286	public static Method findMethodOrThrowException(Class<?> type, String methodName, Class<?>... parameterTypes) {1287		Method methodToMock = findMethod(type, methodName, parameterTypes);1288		throwExceptionIfMethodWasNotFound(type, methodName, methodToMock, parameterTypes);1289		return methodToMock;1290	}1291	/**1292	 * Get an array of {@link Method}'s that matches the supplied list of method1293	 * names. Both instance and static methods are taken into account.1294	 * 1295	 * @param clazz1296	 *            The class that should contain the methods.1297	 * @param methodNames1298	 *            Names of the methods that will be returned.1299	 * @return An array of Method's. May be of length 0 but not1300	 *         <code>null</code>.1301	 * @throws MethodNotFoundException1302	 *             If no method was found.1303	 */1304	public static Method[] getMethods(Class<?> clazz, String... methodNames) {1305		if (methodNames == null || methodNames.length == 0) {1306			throw new IllegalArgumentException("You must supply at least one method name.");1307		}1308		final List<Method> methodsToMock = new LinkedList<Method>();1309		Method[] allMethods = null;1310		if (clazz.isInterface()) {1311			allMethods = getAllPublicMethods(clazz);1312		} else {1313			allMethods = getAllMethods(clazz);1314		}1315		for (Method method : allMethods) {1316			for (String methodName : methodNames) {1317				if (method.getName().equals(methodName)) {1318					method.setAccessible(true);1319					methodsToMock.add(method);1320				}1321			}1322		}1323		final Method[] methodArray = methodsToMock.toArray(new Method[0]);1324		if (methodArray.length == 0) {1325			throw new MethodNotFoundException(String.format("No methods matching the name(s) %s were found in the class hierarchy of %s.",1326					concatenateStrings(methodNames), getType(clazz)));1327		}1328		return methodArray;1329	}1330	/**1331	 * Get an array of {@link Field}'s that matches the supplied list of field1332	 * names. Both instance and static fields are taken into account.1333	 * 1334	 * @param clazz1335	 *            The class that should contain the fields.1336	 * @param fieldNames1337	 *            Names of the fields that will be returned.1338	 * @return An array of Field's. May be of length 0 but not <code>null</code>1339	 *         .1340	 */1341	public static Field[] getFields(Class<?> clazz, String... fieldNames) {1342		final List<Field> fields = new LinkedList<Field>();1343		for (Field field : getAllFields(clazz)) {1344			for (String fieldName : fieldNames) {1345				if (field.getName().equals(fieldName)) {1346					fields.add(field);1347				}1348			}1349		}1350		final Field[] fieldArray = fields.toArray(new Field[fields.size()]);1351		if (fieldArray.length == 0) {1352			throw new FieldNotFoundException(String.format("No fields matching the name(s) %s were found in the class hierarchy of %s.",1353					concatenateStrings(fieldNames), getType(clazz)));1354		}1355		return fieldArray;1356	}1357	@SuppressWarnings("unchecked")1358	public static <T> T performMethodInvocation(Object tested, Method methodToInvoke, Object... arguments) throws Exception {1359		final boolean accessible = methodToInvoke.isAccessible();1360		if (!accessible) {1361			methodToInvoke.setAccessible(true);1362		}1363		try {1364			if (isPotentialVarArgsMethod(methodToInvoke, arguments)) {1365				Class<?>[] parameterTypes = methodToInvoke.getParameterTypes();1366				final int varArgsIndex = parameterTypes.length - 1;1367				Class<?> varArgsType = parameterTypes[varArgsIndex].getComponentType();1368				Object varArgsArrayInstance = createAndPopulateVarArgsArray(varArgsType, varArgsIndex, arguments);1369				Object[] completeArgumentList = new Object[parameterTypes.length];1370				for (int i = 0; i < varArgsIndex; i++) {1371					completeArgumentList[i] = arguments[i];1372				}...

performMethodInvocation

Using AI Code Generation

1package org.powermock.reflect.internal;2import java.lang.reflect.InvocationTargetException;3import java.lang.reflect.Method;4import java.lang.reflect.Modifier;5import org.powermock.core.classloader.annotations.PrepareForTest;6import org.powermock.reflect.Whitebox;7import org.powermock.reflect.exceptions.MethodNotFoundException;8@PrepareForTest(WhiteboxImpl.class)9public class WhiteboxImplTest {10    public static void main(String[] args) throws Exception {11        WhiteboxImplTest whiteboxImplTest = new WhiteboxImplTest();12        whiteboxImplTest.testPerformMethodInvocation();13    }14    public void testPerformMethodInvocation() throws Exception {15        final String expected = "success";16        final String actual = performMethodInvocation("doSomething");17        if (expected.equals(actual)) {18            System.out.println("testPerformMethodInvocation: success");19        } else {20            System.out.println("testPerformMethodInvocation: failed");21        }22    }23    private String performMethodInvocation(String methodName) throws Exception {24        final Method method = Whitebox.getMethod(WhiteboxImplTest.class, methodName);25        if (method == null) {26            throw new MethodNotFoundException("Method not found: " + methodName);27        }28        if (Modifier.isStatic(method.getModifiers())) {29            return (String) Whitebox.invokeMethod(method, null);30        } else {31            return (String) Whitebox.invokeMethod(method, this);32        }33    }34    public String doSomething() {35        return "success";36    }37}

performMethodInvocation

Using AI Code Generation

1PowerMockito.mockStatic(WhiteboxImpl.class);2PowerMockito.doNothing().when(WhiteboxImpl.class);3WhiteboxImpl.performMethodInvocation(any(), any(), any());4PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));5WhiteboxImpl.performMethodInvocation(any(), any(), any());6PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));7WhiteboxImpl.performMethodInvocation(any(), any(), any());8PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));9WhiteboxImpl.performMethodInvocation(any(), any(), any());10PowerMockito.mockStatic(WhiteboxImpl.class);11PowerMockito.doNothing().when(WhiteboxImpl.class);12WhiteboxImpl.performMethodInvocation(any(), any(), any());13PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));14WhiteboxImpl.performMethodInvocation(any(), any(), any());15PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));16WhiteboxImpl.performMethodInvocation(any(), any(), any());17PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));18WhiteboxImpl.performMethodInvocation(any(), any(), any());19PowerMockito.mockStatic(WhiteboxImpl.class);20PowerMockito.doNothing().when(WhiteboxImpl.class);21WhiteboxImpl.performMethodInvocation(any(), any(), any());22PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));23WhiteboxImpl.performMethodInvocation(any(), any(), any());24PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));25WhiteboxImpl.performMethodInvocation(any(), any(), any());26PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));27WhiteboxImpl.performMethodInvocation(any(), any(), any());28PowerMockito.mockStatic(WhiteboxImpl.class);29PowerMockito.doNothing().when(WhiteboxImpl.class);30WhiteboxImpl.performMethodInvocation(any(), any(), any());31PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));32WhiteboxImpl.performMethodInvocation(any(), any(), any());33PowerMockito.verifyStatic(WhiteboxImpl.class, times(1));34WhiteboxImpl.performMethodInvocation(any(), any(), any());

performMethodInvocation

Using AI Code Generation

1import org.powermock.reflect.WhiteboxImpl;2WhiteboxImpl.invokeMethod(object, method, args);3import org.powermock.reflect.Whitebox;4Whitebox.invokeMethod(object, method, args);5import org.powermock.reflect.Whitebox;6Whitebox.invokeConstructor(class, args);7import org.powermock.reflect.Whitebox;8Whitebox.invokeConstructor(class, args);9import org.powermock.reflect.Whitebox;10Whitebox.getInternalState(object, fieldName);11import org.powermock.reflect.Whitebox;12Whitebox.setInternalState(object, fieldName, fieldValue);13import org.powermock.reflect.Whitebox;14Whitebox.getInternalState(class, fieldName);15import org.powermock.reflect.Whitebox;16Whitebox.setInternalState(class, fieldName, fieldValue);17import org.powermock.reflect.Whitebox;18Whitebox.getInternalState(class, fieldName);19import org.powermock.reflect.Whitebox;20Whitebox.setInternalState(class, fieldName, fieldValue);21import org.powermock.reflect.Whitebox;22Whitebox.getInternalState(class, fieldName);23import org.powermock.reflect.Whitebox;24Whitebox.setInternalState(class, fieldName, fieldValue);25import org.powermock.reflect.Whitebox;26Whitebox.getInternalState(class, fieldName);27import org.powermock.reflect.Whitebox;28Whitebox.setInternalState(class, fieldName, fieldValue);

performMethodInvocation

Using AI Code Generation

1package com.example.demo;2import org.junit.Test;3import org.junit.runner.RunWith;4import org.powermock.api.mockito.PowerMockito;5import org.powermock.core.classloader.annotations.PrepareForTest;6import org.powermock.modules.junit4.PowerMockRunner;7import static org.junit.Assert.assertEquals;8@RunWith(PowerMockRunner.class)9@PrepareForTest({DemoApplication.class})10public class DemoApplicationTests {11    public void testPerformMethodInvocation() throws Exception {12        DemoApplication demoApplication = new DemoApplication();13        String result = (String) PowerMockito14                .doCallRealMethod()15                .when(demoApplication)16                .performMethodInvocation();17        assertEquals("hello", result);18    }19}20package com.example.demo;21import org.junit.Test;22import org.junit.runner.RunWith;23import org.powermock.api.mockito.PowerMockito;24import org.powermock.core.classloader.annotations.PrepareForTest;25import org.powermock.modules.junit4.PowerMockRunner;26import static org.junit.Assert.assertEquals;27@RunWith(PowerMockRunner.class)28@PrepareForTest({DemoApplication.class})29public class DemoApplicationTests {30    public void testPerformMethodInvocation() throws Exception {31        DemoApplication demoApplication = new DemoApplication();32        String result = (String) PowerMockito33                .doCallRealMethod()34                .when(demoApplication)35                .performMethodInvocation();36        assertEquals("hello", result);37    }38}39package com.example.demo;40import org.junit.Test;41import org.junit.runner.RunWith;42import org.powermock.api.mockito.PowerMockito;43import org.powermock.core.classloader.annotations.PrepareForTest;44import org.powermock.modules.junit4.PowerMockRunner;45import static org.junit.Assert.assertEquals;46@RunWith(PowerMockRunner.class)

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