How to use MemberModificationExampleTest class of samples.powermockito.junit4.agent package

Best Powermock code snippet using samples.powermockito.junit4.agent.MemberModificationExampleTest

Source:MemberModificationExampleTest.java

...30/**31 * Demonstrates PowerMock's ability to modify member structures.32 */33@PrepareForTest({ SuppressMethod.class, SuppressField.class, SuppressEverything.class })34public class MemberModificationExampleTest {35    @Rule36    public PowerMockRule powerMockRule = new PowerMockRule();37    @Test38    public void suppressSingleMethodExample() throws Exception {39        suppress(method(SuppressMethod.class, "getObject"));40        Assert.assertNull(new SuppressMethod().getObject());41    }42    @Test43    public void suppressMultipleMethodsExample1() throws Exception {44        suppress(methods(SuppressMethod.class, "getObject", "getInt"));45        Assert.assertNull(new SuppressMethod().getObject());46        Assert.assertEquals(0, new SuppressMethod().getInt());47    }48    @Test49    public void suppressMultipleMethodsExample2() throws Exception {50        suppress(methods(method(SuppressMethod.class, "getObject"), method(SuppressMethod.class, "getInt")));51        Assert.assertNull(new SuppressMethod().getObject());52        Assert.assertEquals(0, new SuppressMethod().getInt());53    }54    @Test55    public void suppressAllMethodsExample() throws Exception {56        suppress(methodsDeclaredIn(SuppressMethod.class));57        final SuppressMethod tested = new SuppressMethod();58        Assert.assertNull(tested.getObject());59        Assert.assertNull(SuppressMethod.getObjectStatic());60        Assert.assertEquals(0, tested.getByte());61    }62    @Test63    public void suppressSingleFieldExample() throws Exception {64        suppress(field(SuppressField.class, "domainObject"));65        SuppressField tested = new SuppressField();66        Assert.assertNull(tested.getDomainObject());67    }68    @Test69    public void suppressConstructorExample() throws Exception {70        suppress(constructor(SuppressConstructorHierarchy.class));71        SuppressConstructorHierarchy tested = new SuppressConstructorHierarchy("message");72        Assert.assertEquals(42, tested.getNumber());73        Assert.assertNull(tested.getMessage());74    }75    @Test76    public void stubSingleMethodExample() throws Exception {77        final String expectedReturnValue = "new";78        stub(method(SuppressMethod.class, "getObject")).toReturn(expectedReturnValue);79        final SuppressMethod tested = new SuppressMethod();80        Assert.assertEquals(expectedReturnValue, tested.getObject());81        Assert.assertEquals(expectedReturnValue, tested.getObject());82    }83    @Test84    public void duckTypeStaticMethodExample() throws Exception {85        replace(method(SuppressMethod.class, "getObjectStatic")).with(method(StaticAndInstanceDemo.class, "getStaticMessage"));86        Assert.assertEquals(SuppressMethod.getObjectStatic(), StaticAndInstanceDemo.getStaticMessage());87    }88    @Test89    public void whenReplacingMethodWithAMethodOfIncorrectReturnTypeThenAnIAEIsThrown() throws Exception {90        try {91            replace(method(SuppressMethod.class, "getObjectStatic")).with(method(StaticAndInstanceDemo.class, "aVoidMethod"));92            Assert.fail("Should thow IAE");93        } catch (Exception e) {94            Assert.assertEquals("The replacing method (public static void samples.staticandinstance.StaticAndInstanceDemo.aVoidMethod()) needs to return java.lang.Object and not void.", e.getMessage());95        }96    }97    @Test98    public void whenReplacingMethodWithAMethodOfWithIncorrectParametersThenAnIAEIsThrown() throws Exception {99        try {100            replace(method(SuppressMethod.class, "getObjectStatic")).with(method(StaticAndInstanceDemo.class, "aMethod2"));101            Assert.fail("Should thow IAE");102        } catch (Exception e) {103            Assert.assertEquals("The replacing method, \"public static java.lang.Object samples.staticandinstance.StaticAndInstanceDemo.aMethod2(java.lang.String)\", needs to have the same number of parameters of the same type as as method \"public static java.lang.Object samples.suppressmethod.SuppressMethod.getObjectStatic()\".", e.getMessage());104        }105    }106    @Test107    public void changingReturnValueExample() throws Exception {108        replace(method(SuppressMethod.class, "getObjectWithArgument")).with(new MemberModificationExampleTest.ReturnValueChangingInvocationHandler());109        final SuppressMethod tested = new SuppressMethod();110        Assert.assertThat(tested.getObjectWithArgument("don't do anything"), CoreMatchers.is(CoreMatchers.instanceOf(Object.class)));111        Assert.assertEquals("hello world", tested.getObjectWithArgument("make it a string"));112    }113    @Test114    public void suppressAllConstructors() throws Exception {115        suppress(constructorsDeclaredIn(SuppressEverything.class));116        SuppressEverything suppressEverything = new SuppressEverything();117        new SuppressEverything("test");118        try {119            suppressEverything.something();120            Assert.fail("Should throw ISE");121        } catch (IllegalStateException e) {122            Assert.assertEquals("error", e.getMessage());...

MemberModificationExampleTest

Using AI Code Generation

1package samples.powermockito.junit4.agent;2import org.junit.Test;3import org.junit.runner.RunWith;4import org.powermock.modules.junit4.PowerMockRunner;5import samples.agent.MemberModificationExample;6import static org.junit.Assert.assertEquals;7import static org.powermock.api.mockito.PowerMockito.mock;8import static org.powermock.api.mockito.PowerMockito.when;9@RunWith(PowerMockRunner.class)10public class MemberModificationExampleTest {11    public void testCanMockFinalMethod() throws Exception {12        final MemberModificationExample mock = mock(MemberModificationExample.class);13        when(mock.finalMethod()).thenReturn("finalMethod");14        assertEquals("finalMethod", mock.finalMethod());15    }16    public void testCanMockFinalClass() throws Exception {17        final MemberModificationExample mock = mock(MemberModificationExample.class);18        when(mock.finalClassMethod()).thenReturn("finalClassMethod");19        assertEquals("finalClassMethod", mock.finalClassMethod());20    }21    public void testCanMockFinalStaticMethod() throws Exception {22        final MemberModificationExample mock = mock(MemberModificationExample.class);23        when(mock.finalStaticMethod()).thenReturn("finalStaticMethod");24        assertEquals("finalStaticMethod", mock.finalStaticMethod());25    }26    public void testCanMockFinalStaticClass() throws Exception {27        final MemberModificationExample mock = mock(MemberModificationExample.class);28        when(mock.finalStaticClassMethod()).thenReturn("finalStaticClassMethod");29        assertEquals("finalStaticClassMethod", mock.finalStaticClassMethod());30    }31}32package samples.agent;33public class MemberModificationExample {34    public String finalMethod() {35        return "finalMethod";36    }37    public static String finalStaticMethod() {38        return "finalStaticMethod";39    }40    public String finalClassMethod() {41        return new FinalClass().finalMethod();42    }43    public static String finalStaticClassMethod() {44        return new FinalStaticClass().finalMethod();45    }46    private static class FinalClass {47        public String finalMethod() {48            return "finalMethod";49        }50    }51    private static final class FinalStaticClass {52        public String finalMethod() {53            return "finalMethod";54        }55    }56}57package samples.agent;58public class FinalClass {59    public String finalMethod() {60        return "finalMethod";61    }62}63package samples.agent;64public final class FinalStaticClass {65    public String finalMethod() {66        return "finalMethod";

MemberModificationExampleTest

Using AI Code Generation

1[INFO] [INFO] --- maven-surefire-plugin:2.20:test (default-test) @ powermock-module-junit4-agent ---2[INFO] [INFO] --- maven-jar-plugin:2.6:jar (default-jar) @ powermock-module-junit4-agent ---3[INFO] [INFO] --- maven-clean-plugin:2.5:clean (default-clean) @ powermock ---4[INFO] [INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce-maven) @ powermock ---5[INFO] [INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce-versions) @ powermock ---6[INFO] [INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce-java) @ powermock ---7[INFO] [INFO] --- maven-enforcer-plugin:1.4.1:enforce (enforce-encoding) @ powermock ---

MemberModificationExampleTest

Using AI Code Generation

1	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:20)2	at org.junit.Assert.assertThat(Assert.java:956)3	at org.junit.Assert.assertThat(Assert.java:923)4	at samples.powermockito.junit4.agent.MemberModificationExampleTest.testMockingPrivateMethodCall(MemberModificationExampleTest.java:45)5PowerMockito.mockStatic(PrivateMethod.class);6PowerMockito.when(PrivateMethod.class, "privateMethod", anyString()).thenReturn("Hello world");7	at org.powermock.reflect.WhiteboxImpl.doMock(WhiteboxImpl.java:175)8	at org.powermock.reflect.WhiteboxImpl.doMock(WhiteboxImpl.java:160)9	at org.powermock.reflect.WhiteboxImpl.doMock(WhiteboxImpl.java:155)10	at org.powermock.reflect.WhiteboxImpl.mock(WhiteboxImpl.java:115)11	at org.powermock.reflect.Whitebox.mock(Whitebox.java:104)12	at org.powermock.reflect.Whitebox.mockStatic(Whitebox.java:99)13	at org.powermock.reflect.Whitebox.mockStatic(Whitebox.java:89)14	at samples.powermockito.junit4.agent.MemberModificationExampleTest.testMockingPrivateMethodCall(MemberModificationExampleTest.java:44)

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