Hi i have a class like thisclass MyClass {  private ExternalClass1 ex1;  private ExternalClass2 ex2;  private ExternalClass3 ex3public String doSomething(String arg1){  val1=ex1.invoke(arg1);  val2=ex2.call(val1);  result=ex3.doit(val2); return result;}    }unit test of this method@Testvoid doSometing(){   ExternalClass1 ex1=mock(ExternalClass1);   ExternalClass2 ex2=mock(ExternalClass2);   ExternalClass3 ex3=mock(ExternalClass2);when(ex1.invoke(arg1)).thenReturn(val1);when(ex2.call(val1)).thenReturn(val2);when(ex3.doit(val2)).thenReturn(result);Myclass myClass=new MyClass(ex1,ex2,ex3);assertEquals(result,myClass.doSomething(arg1))}The test code of this method seems to be a simple repetition of the code itself, but more complex.Does the test of this kind of class whose role is to control other classes brings any value?Thank's
Unit test a class that sequentially calls other classes
unit testing;mocking