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Mockito.mock()
Creates a mock of any non final class
Creates a mock of any class. By default, it will return default value for methods and fields when not mocked.
For Example: Primitive data types such as
byte, short, int, long, float, double, boolean and char will return default value i.e 0 or falseNon-primitive data types such as
String, Arrays and Classes return null when they are not mocked.// with annotation
@Mock
private ClassName mock;
// Or with static method
final ClassName mock = Mockito.mock(ClassName.class);
// mock methods that returns something
Mockito.when(mock.sampleMethod()).thenReturn(sampleVal);
// mock method to throw Exception
Mockito.when(mock.sampleMethod()).thenThrow(SampleException.class);
// Mock void methods
Mockito.doNothing().when(mock).method();
// you can get invocation parameters with .thenAnswer()
Mockito.when(mock.sampleMethod(Mockito.any(OtherClass.class))).thenAnswer((Answer<ThirdClass>) invocation -> {
final OtherClass parameter1 = invocation.getArgument(0);
return thirdClassObject;
});
// Verify interactions
Mockito.verify(mock, Mockito.times(1)).sampleMethod();
// Verify, method should not be invoked even once
Mockito.verify(mock, Mockito.never()).sampleMethod2();
// Verify, no methods should be called on given mock
Mockito.verifyNoMoreInteractions(otherMockedClass);
Last modified 6mo ago