Mockito verify order sequence of method calls

Question

Is there a way to verify if a methodOne is called before methodTwo in Mockito   public class ServiceClassA       public void methodOne         public class ServiceClassB       public void methodTwo            public class TestClass       public void method            ServiceClassA serviceA   new ServiceClassA            ServiceClassB serviceB   new ServiceClassB            serviceA methodOne            serviceB methodTwo

User · Answer

Yes  this is described in the documentation  You have to use the InOrder class   Example  assuming two mocks already created    InOrder inOrder   inOrder serviceAMock  serviceBMock    inOrder verify serviceAMock  methodOne    inOrder verify serviceBMock  methodTwo

User · Answer

Note that you can also use the InOrder class to verify that various methods are called in order on a single mock  not just on two or more mocks   Suppose I have two classes Foo and Bar   public class Foo     public void first        public void second         public class Bar     public void firstThenSecond Foo foo        foo first        foo second            I can then add a test class to test that Bar s firstThenSecond   method actually calls first    then second    and not second    then first    See the following test code   public class BarTest      Test   public void testFirstThenSecond         Bar bar   new Bar        Foo mockFoo   Mockito mock Foo class       bar firstThenSecond mockFoo        InOrder orderVerifier   Mockito inOrder mockFoo          These lines will PASS     orderVerifier verify mockFoo  first        orderVerifier verify mockFoo  second            These lines will FAIL        orderVerifier verify mockFoo  second           orderVerifier verify mockFoo  first

User · Answer

With BDD it s   Test public void testOrderWithBDD              Given     ServiceClassA firstMock   mock ServiceClassA class       ServiceClassB secondMock   mock ServiceClassB class          create inOrder object passing any mocks that need to be verified in order     InOrder inOrder   inOrder firstMock  secondMock        willDoNothing   given firstMock  methodOne        willDoNothing   given secondMock  methodTwo            When     firstMock methodOne        secondMock methodTwo            Then     then firstMock  should inOrder  methodOne        then secondMock  should inOrder  methodTwo

User · Answer

InOrder helps you to do that   ServiceClassA firstMock   mock ServiceClassA class   ServiceClassB secondMock   mock ServiceClassB class    Mockito doNothing   when firstMock  methodOne       Mockito doNothing   when secondMock  methodTwo         create inOrder object passing any mocks that need to be verified in order InOrder inOrder   inOrder firstMock  secondMock      following will make sure that firstMock was called before secondMock inOrder verify firstMock  methodOne    inOrder verify secondMock  methodTwo

[java] Mockito verify order / sequence of method calls

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