How to use noMatchingConstructor method of org.mockito.internal.creation.instance.ConstructorInstantiator class

Best Mockito code snippet using org.mockito.internal.creation.instance.ConstructorInstantiator.noMatchingConstructor

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...29 }30 } catch (Exception e) {31 throw paramsException(cls, e);32 }33 throw noMatchingConstructor(cls);34 }35 @SuppressWarnings("unchecked")36 private static <T> T invokeConstructor(Constructor<?> constructor, Object... params) throws java.lang.InstantiationException, IllegalAccessException, java.lang.reflect.InvocationTargetException {37 AccessibilityChanger accessibility = new AccessibilityChanger();38 accessibility.enableAccess(constructor);39 return (T) constructor.newInstance(params);40 }41 private static <T> InstantiationException paramsException(Class<T> cls, Exception cause) {42 return new InstantiationException(43 join("Unable to create instance of '" + cls.getSimpleName() + "'.",44 "Please ensure that the outer instance has correct type and that the target class has 0-arg constructor."),45 cause);46 }47 private static <T> InstantiationException noMatchingConstructor(Class<T> cls) {48 return new InstantiationException(49 join("Unable to create instance of '" + cls.getSimpleName() + "'.",50 "Unable to find a matching 1-arg constructor for the outer instance.")51 , null);52 }53 private static boolean paramsMatch(Class<?>[] types, Object[] params) {54 if (params.length != types.length) {55 return false;56 }57 for (int i = 0; i < params.length; i++) {58 if (!types[i].isInstance(params[i])) {59 return false;60 }61 }...

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noMatchingConstructor

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1public class ConstructorInstantiatorTest {2 public void testNoMatchingConstructor() {3 ConstructorInstantiator instantiator = new ConstructorInstantiator();4 try {5 instantiator.newInstance(ConstructorInstantiatorTest.class, new Object[] { "test" });6 fail();7 } catch (MockitoException e) {8 assertEquals("Unable to create instance of class ConstructorInstantiatorTest. " +9 "Please ensure that the class is not abstract and has at least one constructor.", e.getMessage());10 }11 }12}13public class ConstructorInstantiatorTest {14 public void testNoMatchingConstructor() {15 ConstructorInstantiator instantiator = new ConstructorInstantiator();16 try {17 instantiator.newInstance(ConstructorInstantiatorTest.class, new Object[] { "test" });18 fail();19 } catch (MockitoException e) {20 assertEquals("Unable to create instance of class ConstructorInstantiatorTest. " +21 "Please ensure that the class is not abstract and has at least one constructor.", e.getMessage());22 }23 }24}25public class ConstructorInstantiatorTest {26 public void testNoMatchingConstructor() {27 ConstructorInstantiator instantiator = new ConstructorInstantiator();28 try {29 instantiator.newInstance(ConstructorInstantiatorTest.class, new Object[] { "test" });30 fail();31 } catch (MockitoException e) {32 assertEquals("Unable to create instance of class ConstructorInstantiatorTest. " +33 "Please ensure that the class is not abstract and has at least one constructor.", e.getMessage());34 }35 }36}37public class ConstructorInstantiatorTest {38 public void testNoMatchingConstructor() {39 ConstructorInstantiator instantiator = new ConstructorInstantiator();40 try {41 instantiator.newInstance(ConstructorInstantiatorTest.class, new Object[] { "test" });42 fail();43 } catch (MockitoException e) {44 assertEquals("Unable to create instance of class ConstructorInstantiatorTest. " +45 "Please ensure that the class is not abstract and has at least one constructor.", e.getMessage());46 }47 }48}

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noMatchingConstructor

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1import org.mockito.internal.creation.instance.ConstructorInstantiator2import org.mockito.internal.creation.instance.NoOpInstantiator3import org.mockito.internal.creation.instance.NoOpInstantiator$NoOpInstantiatorImpl4import org.mockito.internal.creation.instance.NoOpInstantiator$NoOpInstantiatorImpl$NoOpInstantiatorImpl5import org.mockito.internal.creation.instance.NoOpInstantiator$NoOpInstantiatorImpl$NoOpInstantiatorImpl$NoOpInstantiatorImpl6import org.mockito.internal.creation.instance.NoOpInstantiator$NoOpInstantiatorImpl$NoOpInstantiatorImpl$NoOpInstantiatorImpl$NoOpInstantiatorImpl7import org.mockito.internal.creation.instance.NoOpInstantiator$NoOpInstantiatorImpl$NoOpInstantiatorImpl$NoOpInstantiatorImpl$NoOpInstantiatorIm

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noMatchingConstructor

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1import org.mockito.internal.creation.instance.ConstructorInstantiator;2class A {3 private A() {}4}5class B {6 private B() {}7}8A a = new ConstructorInstantiator().noMatchingConstructor(A.class);9B b = new ConstructorInstantiator().noMatchingConstructor(B.class);10assert a != b;

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noMatchingConstructor

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1import org.mockito.internal.creation.instance.ConstructorInstantiator;2import org.mockito.Mockito;3import org.mockito.exceptions.base.MockitoException;4import org.mockito.invocation.InvocationOnMock;5import org.mockito.stubbing.Answer;6public class MockitoNoMatchingConstructorExample {7 public static void main(String[] args) {8 ConstructorInstantiator constructorInstantiator = new ConstructorInstantiator();9 try {10 constructorInstantiator.newInstance(Example.class);11 } catch (MockitoException e) {12 System.out.println("MockitoException: " + e.getMessage());13 }14 Example example = Mockito.mock(Example.class, Mockito.withSettings()15 .useConstructor()16 .defaultAnswer(Mockito.RETURNS_DEEP_STUBS)17 .name("example")18 .serializable()19 .verboseLogging()20 .spiedInstance(new Example()));21 Mockito.when(example.getExample()).thenReturn("example");22 System.out.println(example.getExample());23 Mockito.verify(example).getExample();24 }25}26public class Example {27 private Example() {28 }29 public String getExample() {30 return "example";31 }32}

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noMatchingConstructor

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1import org.mockito.internal.creation.instance.ConstructorInstantiator2import org.mockito.internal.creation.instance.InstantiationException3import org.mockito.internal.creation.instance.InstantiatorProvider4import org.mockito.internal.util.MockUtil5class MockUtil2 extends MockUtil {6 protected Object createMock(Object mockSettings, Object mockitoInterceptor) {7 try {8 return new ConstructorInstantiator().newInstance(9 } catch (InstantiationException e) {10 throw new RuntimeException(e)11 }12 }13}14import org.mockito.internal.creation.instance.InstantiatorProvider15class InstantiatorProvider2 extends InstantiatorProvider {16 protected Instantiator getInstantiator() {17 return new Instantiator() {18 Object newInstance(Object mockSettings, Object mockitoInterceptor) {19 return new MockUtil2().createMock(mockSettings, mockitoInterceptor)20 }21 }22 }23}24def mock(Class<?> type, MockSettings settings) {25 new InstantiatorProvider2().getInstantiator().newInstance(settings, null)26}27def mock = mock(MyClass, MockSettings.withExtraInterfaces(MyInterface.class))28when(mock.method1(anyString())).thenReturn("mocked")29verify(mock).method1("test")30when(MyClass.method2(anyString())).thenReturn("mocked")31verify(MyClass).method2("test")32when(mock.method3(anyString())).thenReturn("mocked")33verify(mock).method3("test")34when(mock.method4(anyString())).thenReturn("mocked")35verify(mock).method4("test")36when(mock.method5(anyString(), anyInt())).thenReturn("mocked")37verify(mock).method5("test", 1)38when(mock.method6

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StackOverFlow community discussions

Questions
Discussion

Difference between @Mock and @InjectMocks

Can Mockito capture arguments of a method called multiple times?

Mockito How to mock only the call of a method of the superclass

Mockito verify the return of a spied object method

Mocking okhttp response

Mockito preferrable over EasyMock?

How to send a mock object as JSON in mockmvc

Unit under test: Impl or Interface?

Mock objects calling final classes static methods with Mockito

Using Mockito to mock a local variable of a method

@Mock creates a mock. @InjectMocks creates an instance of the class and injects the mocks that are created with the @Mock (or @Spy) annotations into this instance.

Note you must use @RunWith(MockitoJUnitRunner.class) or Mockito.initMocks(this) to initialize these mocks and inject them (JUnit 4).

With JUnit 5, you must use @ExtendWith(MockitoExtension.class).

@RunWith(MockitoJUnitRunner.class) // JUnit 4
// @ExtendWith(MockitoExtension.class) for JUnit 5
public class SomeManagerTest {

    @InjectMocks
    private SomeManager someManager;

    @Mock
    private SomeDependency someDependency; // this will be injected into someManager
 
     // tests...

}
https://stackoverflow.com/questions/16467685/difference-between-mock-and-injectmocks

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