ir2pid :
How to get constructor injection in Mockito
I have the following class:
class A{
private B mB;
A(B b){
mB = b;
}
void String someMethod(){
mB.execute();
}
}
how do I test someMethod using a mock class A and class B using
B b = Mockito.mock(B.class)
Mockito.when(b.execute().thenReturn("String")
A a = Mockito.mock(A.class)
//somehow inject b into A and make the below statement run
Mockito.when(a.someMethod()).check(equals("String"))
rastaman :
You want to test someMethod() of class A. Testing the execute() of class B should take place in the other test, because instance of B is a dependency in your case. Test for execute() should be made in different test.
You don't need to test how B object will behave, so you need to mock it and afterwards, check that execute() was invoked.
So in your case your test will look something like this:
B b = Mockito.mock(B.class);
A a = new A( b );
a.someMethod();
Mockito.verify( b, Mockito.times( 1 ) ).execute();
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