How to use testDoReturnNullValue method of test.StubberTest class

Best Mockito-kotlin code snippet using test.StubberTest.testDoReturnNullValue

StubberTest.kt

Source:StubberTest.kt

...32        doReturn("com/mockito/mockitokotlin2").whenever(mock).stringResult()33        expect(mock.stringResult()).toBe("com/mockito/mockitokotlin2")34    }35    @Test36    fun testDoReturnNullValue() {37        val mock = mock<Methods>()38        doReturn(null).whenever(mock).stringResult()39        expect(mock.stringResult()).toBeNull()40    }41    @Test42    fun testDoReturnNullValues() {43        val mock = mock<Methods>()44        doReturn(null, null).whenever(mock).stringResult()45        expect(mock.stringResult()).toBeNull()46        expect(mock.stringResult()).toBeNull()47    }48    @Test49    fun testDoReturnValues() {50        val mock = mock<Methods>()51        doReturn("com/mockito/mockitokotlin2", "test2").whenever(mock).stringResult()52        expect(mock.stringResult()).toBe("com/mockito/mockitokotlin2")53        expect(mock.stringResult()).toBe("test2")54    }55    @Test56    fun testDoThrowClass() {...

testDoReturnNullValue

Using AI Code Generation

1		StubberTest stub = new StubberTest();2		when(stub.testDoReturnNullValue()).thenReturn(null);3		assertNull(stub.testDoReturnNullValue());4	}5	public void testDoReturn() {6		StubberTest stub = new StubberTest();7		when(stub.testDoReturn()).thenReturn("Hello");8		assertEquals("Hello", stub.testDoReturn());9	}10	public void testDoThrow() {11		StubberTest stub = new StubberTest();12		when(stub.testDoThrow()).thenThrow(new RuntimeException());13	}14	public void testDoNothing() {15		StubberTest stub = mock(Stubberest();16		doNothing().when(stub).tTetDoNoshingt.c17		stub.testDoNothing();18	}19	public void testDoAnswer() {20		StubberTest stub = new StubberTest();21		when(stub.testDoAnswer()).thenAnswer(new Answer<String>(){22			public String answer(InvocationOnMock invocation) {23				return "Hello";24			}25		});26		assertEquals("Hello", stub.testDoAnswer());27	}28	public void testDoReturnWithArgument() {29		StubberTest stub = new StubberTest();30		when(stub.testDoReturnWithArgument()).thenReturn("Hello");31		assertEquals("Hello", stub.testDoReturnWithArgument());32	}33	public void testDoReturnWithArguments() {34		StubberTest stub = new StubberTest();35		when(stub.testDoReturnWithArguments()).thenReturn("Hello");36		assertEquals("Hello", stub.testDoReturnWithArguments());37	}38	public void testDoReturnWithArgumentsAndAnswer() {

testDoReturnNullValue

Using AI Code Generation

1		StubberTewh st = new Sten(stubbe();2		when(strTest.testDoReullValue()).thenReturn(null);3		assertNull(st.testDoReturnNullValue());4	}5	public void testDoReturnDefaultValue() {6		StubberTest st = new StubberTest();7		when(st.testDoReturnDefatutValue()).thenReturn(0);8		assertEquals(0, st.testDoReturnDefaurtnNullVa)lue()).thenReturn(null);9	}10	public void testDoReturnMultipleValues() {11		StubberTest st = new StubberTest();12		when(st.testDoReturnMultipleValues()).thenReturn("Hello").thenReturn("World");13		assertEquals("Hello", st.testDoReturnMultipleValues());14		assertEquals("World", st.testDoReturnMultipleValues());15	public void testDoReturnMultipleValuesUsingDoReturn() {16		StubberTest st = new StubberTest();17		when(st.testDoReturnMultipleValuesUsingDoReturn()).thenReturn("Hello");18		doReturn("World").when(st).testDoReturnMultipleValuesUsingDoReturn();19		assertEquals("Hello", st.testDoReturnMultipleValuesUsingDoReturn());20		assertEquals("World", st.testDoReturnMultipleValuesUsingDoReturn());21	}22	public void testDoReturnMultipleValuesUsingDoReturnWithDifferentTypes() {23		StubberTest st = new StubberTest();24		when(st.testDoReturnMultipleValuesUsingDoReturnWithDifferentTypes()).thenReturn("Hello");25		doReturn(1).when(st).testDoReturnMultipleValuesUsingDoReturnWithDifferentTypes();26		assertEquals("Hello", st.testDoReturnMultipleValuesUsingDoReturnWithDifferentTypes());27		assertEquals(1, st.testDoReturnMultipleValuesUsingDoReturnWithDifferentTypes());28	}29	public void testDoReturnMultipleValuesUsingDoReturnWithDifferentTypesAndDifferentMethods() {

testDoReturnNullValue

Using AI Code Generation

1		StubberTest stub = new StubberTest();	}2	}when(stub.testDoReturnNullValue()).thenReturn(null);3		assertNull(stub.testDoReturnNullValue());4	}5	public void testDoReturn() {6		StubberTeststub = new StubberTest();7		when(stub.testDoReturn()).thenRetrn("Hello");8		asrtEquals("Hello",sub.teturn());9	}10	public void testDoThrow() {11		StubberTest stub = new StubberTest();12		when(stub.testDoThrow()).thenThrow(new RuntimeException());13	}14	public void testDoNothing() {15		StubbrTes stb = new StubbeTest();16		doNothig().when(stub).testDoothing();17		stub.testDoNothing();18	}19	public void testDoAnswer() {20		StubberTest stub = new StubberTest();21		when(stub.testDoAnswer()).thenAnswer(new Answer<String>(){22			public String answer(InvocationOnMock invocation) {23				return "Hello";24			}25		});26		assertEquals("Hello", stub.testDoAnswer());27	}28	pbic void testDoReturnWithArgument() {29		StubberTest stub = new StubberTest();30		when(stub.testDoReturnWithArgument()).thenReturn("Hello");31		assertEquals("Hello", stub.testDoReturnWithArgument());32	}33	public void testDoReturnWithArguments() {34		StubberTest stub = new StubberTest();35		when(stub.testDoReturnWithArguments()).thenReturn("Hello");36		assertEquals("Hello", stub.testDoReturnWithArguments());37	}38	public void testDoReturnWithArgumentsAndAnswer() {

testDoReturnNullValue

Using AI Code Generation

1		StubberTest stubberTest = new StubberTest();2		stubberTest.testDoReturnNullValue();3	}4	public void testDoReturnNullValue() {5		List<String> mockList = mock(List.class);6		when(mockList.get(anyInt())).thenReturn(null);7		String result = mockList.get(0);8		assertNull(result);9	}10}11Example 2: How to use doReturn() method with void methods?12package com.javacodegeeks.mockito;13import static org.mockito.Mockito.doReturn;14import static org.mockito.Mockito.mock;15import java.util.List;16import org.junit.Test;17public class StubberTest {18	public static void main(String[] args) {19		StubberTest stubberTest = new StubberTest();20		stubberTest.testDoReturnVoidMethod();21	}22	public void testDoReturnVoidMethod() {23		List<String> mockList = mock(List.class);24		doReturn("Hello World").when(mockList).get(0);25		String result = mockList.get(0);26		assertEquals("Hello World", result);27	}28}29Example 3: How to use doThrow() method with void methods?30package com.javacodegeeks.mockito;31import static org.mockito.Mockito.doThrow;32import static org.mockito.Mockito.mock;33import java.io.IOException;34import java.io.OutputStream;35import java.io.OutputStreamWriter;36import org.junit.Test;37public class StubberTest {38	public static void main(String[] args) {39		StubberTest stubberTest = new StubberTest();40		stubberTest.testDoThrowVoidMethod();41	}42	public void testDoThrowVoidMethod() {43		OutputStream mockStream = mock(OutputStream.class);44		OutputStreamWriter writer = new OutputStreamWriter(mockStream);45		doThrow(new IOException()).when(mockStream).close();46		try {47			writer.close();48		} catch (IOException e) {49			e.printStackTrace();50		}51	}52}

testDoReturnNullValue

Using AI Code Generation

1		StubberTest st = new StubberTest();2		String actual = st.testDoReturnNullValue();3		String expected = null;4		assertEquals(expected, actual);5	}6	public void testDoReturnEmptyValue() {7		StubberTest st = new StubberTest();8		String actual = st.testDoReturnEmptyValue();9		String expected = "";10		assertEquals(expected, actual);11	}12	public void testDoThrowException() {13		StubberTest st = new StubberTest();14		String actual = st.testDoThrowException();15		String expected = "Exception Occured";16		assertEquals(expected, actual);17	}18	public void testDoThrowExceptionWithMessage() {19		StubberTest st = new StubberTest();20		String actual = st.testDoThrowExceptionWithMessage();21		String expected = "Exception Occured";22		assertEquals(expected, actual);23	}24	public void testDoThrowExceptionWithMessageAndCause() {25		StubberTest st = new StubberTest();26		String actual = st.testDoThrowExceptionWithMessageAndCause();27		String expected = "Exception Occured";28		assertEquals(expected, actual);Trace() {

testDoReturnNullValue

Using AI Code Generation

1		when(testStubberTest.testDoReturnNullValue()).thenReturn(null);2		assertNull(testStubberest.testDoRetunNullVlue());3	}4		when(testStubberTest.testDoReturnNullValueWithArgument(1)).thenReturn(null);5		assertNull(testStubberTest.testDoReturnNullValueWithArgument(1));6	}7	public void testDoReturnNullValueWithArgumentMatchers() {8		when(testStubberTest.testDoReturnNullValueWithArgumentMatchers(anyInt())).thenReturn(null);9		assertNull(testStubberTest.testDoReturnNullValueWithArgumentMatchers(1));10	}11	public void testDoReturnNullValueWithAnyArgument() {12		when(testStubberTest.testDoReturnNullValueWithAnyArgument()).thenReturn(null);13		assertNull(testStubberTest.testDoReturnNullValueWithAnyArgument());14	}15	public void testDoReturnNullValueWithNoArgument() {16		when(testStubberTest.testDoReturnNullValueWithNoArgument()).thenReturn(null);17		assertNull(testStubberTest.testDoReturnNullValueWithNoArgument());18	}19	public void testDoReturnNullValueWithNoArgumentWithVoidReturnType() {20		doReturn(null).when(testStubberTest).testDoReturnNullValueWithNoArgumentWithVoidReturnType();21		assertNull(testStubberTest.testDoReturnNullValueWithNoArgumentWithVoidReturnType());22	}23	public void testDoReturnNullValueWithArgumentWithVoidReturnType() {24	}25	public void testDoThrowExceptionWithCause() {26		StubberTest st = new StubberTest();27		String actual = st.testDoThrowExceptionWithCause();28		String expected = "Exception Occured";29		assertEquals(expected, actual);30	}31	public void testDoThrowExceptionWithCauseAndMessage() {32		StubberTest st = new StubberTest();33		String actual = st.testDoThrowExceptionWithCauseAndMessage();34		String expected = "Exception Occured";35		assertEquals(expected, actual);36	}37	public void testDoThrowExceptionWithCauseAndMessageAndStackTrace() {

testDoReturnNullValue

Using AI Code Generation

1		when(testStubberTest.testDoReturnNullValue()).thenReturn(null);2		assertNull(testStubberTest.testDoReturnNullValue());3	}4	public void testDoReturnNullValueWithArgument() {5		when(testStubberTest.testDoReturnNullValueWithArgument(1)).thenReturn(null);6		assertNull(testStubberTest.testDoReturnNullValueWithArgument(1));7	}8	public void testDoReturnNullValueWithArgumentMatchers() {9		when(testStubberTest.testDoReturnNullValueWithArgumentMatchers(anyInt())).thenReturn(null);10		assertNull(testStubberTest.testDoReturnNullValueWithArgumentMatchers(1));11	}12	public void testDoReturnNullValueWithAnyArgument() {13		when(testStubberTest.testDoReturnNullValueWithAnyArgument()).thenReturn(null);14		assertNull(testStubberTest.testDoReturnNullValueWithAnyArgument());15	}16	public void testDoReturnNullValueWithNoArgument() {17		when(testStubberTest.testDoReturnNullValueWithNoArgument()).thenReturn(null);18		assertNull(testStubberTest.testDoReturnNullValueWithNoArgument());19	}20	public void testDoReturnNullValueWithNoArgumentWithVoidReturnType() {21		doReturn(null).when(testStubberTest).testDoReturnNullValueWithNoArgumentWithVoidReturnType();22		assertNull(testStubberTest.testDoReturnNullValueWithNoArgumentWithVoidReturnType());23	}24	public void testDoReturnNullValueWithArgumentWithVoidReturnType() {

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.