format for writing clean junit tests

clean-junit-test-format.java

class {NameOfClass}Tests{

    @Nested
    @DisplayName("{methodName} method")
    class {MethodName}Tests{
     
        @Nested
        @DisplayName("WHEN {condition description}")
        class {ConditionDescription}Tests{
        
            @Nested
            @DisplayName("SHOULD {assertion description}")
            class {AssertionDescription}Tests{
                // GIVEN
                    {code for setting conditions describe in WHEN block}
          
                // WHEN
                    {code for running actions}
                
                // THEN
                    {code for assertions}
            }
        }
    }
}