KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use nativeStaticReturnMethod method of powermock.test.support.MainMockTransformerTestSupport class

Best Powermock code snippet using powermock.test.support.MainMockTransformerTestSupport.nativeStaticReturnMethod

Source:NativeMethodsMockTransformerTest.java

...42    @Test43    public void should_return_value_from_getaway_for_native_static_methods_if_it_is_not_PROCEED() throws Exception {44        assumeClassLoaderMode();45        final String expected = RandomString.make(10);46        MockGatewaySpy.returnOnMethodCall("nativeStaticReturnMethod", expected);47        final Class<?> clazz = loadWithMockClassLoader(MainMockTransformerTestSupport.NativeMethodsTestClass.class.getName());48        final String name = "name";49        final Object result = WhiteboxImpl.invokeMethod(clazz, "nativeStaticReturnMethod", name);50        assertThat(result).isEqualTo(expected);51        assertThat(MockGatewaySpy.methodCalls()).is(registered().forMethod("nativeStaticReturnMethod"));52    }53    @Test54    public void should_throw_UnsupportedOperationException_for_native_instance_if_it_is_PROCEED() throws Exception {55        assumeClassLoaderMode();56        final Class<?> clazz = loadWithMockClassLoader(MainMockTransformerTestSupport.NativeMethodsTestClass.class.getName());57        final String name = "name";58        assertThatThrownBy(new ThrowingCallable() {59            @Override60            public void call() throws Throwable {61                final Object instance = WhiteboxImpl.newInstance(clazz);62                WhiteboxImpl.invokeMethod(instance, "nativeReturnMethod", name);63            }64        }).isExactlyInstanceOf(UnsupportedOperationException.class);65    }66    @Test67    public void should_throw_UnsupportedOperationException_for_native_static_if_it_is_PROCEED() throws Exception {68        assumeClassLoaderMode();69        final Class<?> clazz = loadWithMockClassLoader(MainMockTransformerTestSupport.NativeMethodsTestClass.class.getName());70        final String name = "name";71        assertThatThrownBy(new ThrowingCallable() {72            @Override73            public void call() throws Throwable {74                WhiteboxImpl.invokeMethod(clazz, "nativeStaticReturnMethod", name);75            }76        }).isExactlyInstanceOf(UnsupportedOperationException.class);77    }78    @Test79    public void should_not_handle_hashCode_form_Object() throws Exception {80        assumeClassLoaderMode();81        final Class<?> clazz = loadWithMockClassLoader(MainMockTransformerTestSupport.ClassWithoutHashCode.class.getName());82        final Object instance = WhiteboxImpl.newInstance(clazz);83        final Object result = WhiteboxImpl.invokeMethod(instance, "hashCode");84        assertThat(result).isEqualTo(System.identityHashCode(instance));85    }86    @Test87    public void should_throw_UnsupportedOperationException_for_native_method_of_parent_instance_if_it_is_PROCEED() throws Exception {88        assumeClassLoaderMode();...

nativeStaticReturnMethod

Using AI Code Generation

1public class MainMockTransformerTestSupportTest {2    public void testMockStaticReturnMethod() {3        MainMockTransformerTestSupport mockTransformerTestSupport = new MainMockTransformerTestSupport();4        String result = mockTransformerTestSupport.nativeStaticReturnMethod();5        assertThat(result).isEqualTo("mocked");6    }7}8In the previous example we used a class from the same package. What if the class we want to mock is in a different package? In this case, we have to use PowerMockito.mockStatic() method. In the following example we mock the static method of the java.lang.System class:9import org.junit.Test;10import org.powermock.api.mockito.PowerMockito;11import org.powermock.reflect.Whitebox;12import java.io.PrintStream;13import static org.assertj.core.api.Assertions.assertThat;14public class MainMockTransformerTestSupportTest {15    public void testMockStaticReturnMethod() {16        PowerMockito.mockStatic(System.class);17        PrintStream printStream = new PrintStream(System.out);18        PowerMockito.when(System.out).thenReturn(printStream);19        Whitebox.invokeMethod(System.out, "println", "Hello World!");20        assertThat(printStream.toString()).isEqualTo("Hello World!");21    }22}23In the previous example we used the Whitebox.invokeMethod() method to invoke the println() method. In the following example we use the PowerMockito.verifyStatic() method to verify that the println() method was called:24import org.junit.Test;25import org.powermock.api.mockito.PowerMockito;26import org.powermock.reflect.Whitebox;27import java.io.PrintStream;28import static org.assertj.core.api.Assertions.assertThat;29public class MainMockTransformerTestSupportTest {30    public void testMockStaticReturnMethod() {31        PowerMockito.mockStatic(System.class);32        PrintStream printStream = new PrintStream(System.out);33        PowerMockito.when(System.out).thenReturn(printStream);34        Whitebox.invokeMethod(System.out, "println", "Hello World!");35        PowerMockito.verifyStatic(System.class);36        Whitebox.invokeMethod(System.out, "println", "Hello World!");37    }38}39In the previous example we used the Whitebox.invokeMethod() method to invoke the println() method. In the following example we use the PowerMockito.verifyStatic() method

nativeStaticReturnMethod

Using AI Code Generation

1package powermock.test.support;2import java.lang.reflect.Method;3import java.lang.reflect.Modifier;4import java.util.Map;5import java.util.concurrent.ConcurrentHashMap;6public class MainMockTransformerTestSupport {7    private final static Map<Method, Method> nativeStaticReturnMethodMap = new ConcurrentHashMap<Method, Method>();8    private static Method getNativeStaticReturnMethod(Method method) {9        Method nativeMethod = nativeStaticReturnMethodMap.get(method);10        if (nativeMethod == null) {11            try {12                nativeMethod = method.getDeclaringClass().getDeclaredMethod(method.getName(), method.getParameterTypes());13                if (Modifier.isStatic(nativeMethod.getModifiers())) {14                    nativeMethod.setAccessible(true);15                    nativeStaticReturnMethodMap.put(method, nativeMethod);16                } else {17                    throw new IllegalStateException("Method " + nativeMethod + " is not static");18                }19            } catch (NoSuchMethodException e) {20                throw new IllegalStateException("Method " + nativeMethod + " is not found", e);21            }22        }23        return nativeMethod;24    }25    public static Object nativeStaticReturnMethod(Object thiz, Object[] args) throws Throwable {26        Method method = (Method) args[0];27        Object[] arguments = (Object[]) args[1];28        Method nativeMethod = getNativeStaticReturnMethod(method);29        return nativeMethod.invoke(null, arguments);30    }31}32package powermock.test.support;33import java.lang.reflect.Method;34import java.lang.reflect.Modifier;35import java.util.Map;36import java.util.concurrent.ConcurrentHashMap;37public class MainMockTransformerTestSupport {38    private final static Map<Method, Method> nativeStaticReturnMethodMap = new ConcurrentHashMap<Method, Method>();39    private static Method getNativeStaticReturnMethod(Method method) {40        Method nativeMethod = nativeStaticReturnMethodMap.get(method);41        if (nativeMethod == null) {42            try {43                nativeMethod = method.getDeclaringClass().getDeclaredMethod(method.getName(), method.getParameter

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.