expect:
        stateString {} == "NOT EXECUTED"
        stateString { toBeforeEvaluate() } == "EXECUTING"
        stateString { toBeforeEvaluate(); toEvaluate() } == "EXECUTING"
        stateString { toBeforeEvaluate(); toEvaluate(); toAfterEvaluate() } == "EXECUTING"
        stateString { configured() } == "EXECUTED"

        host.beforeRead(null) == "configuration of <project> has not completed yet"
        state.toBeforeEvaluate()
        host.beforeRead(null) == "configuration of <project> has not completed yet"
        state.toEvaluate()
        host.beforeRead(null) == "configuration of <project> has not completed yet"
        state.toAfterEvaluate()
        host.beforeRead(null) == "configuration of <project> has not completed yet"

        return state == State.CONFIGURED;
    }

    public void toBeforeEvaluate() {
        assert state == State.UNCONFIGURED;
        state = State.IN_BEFORE_EVALUATE;
    }

    public void toEvaluate() {
        assert state == State.IN_BEFORE_EVALUATE;
        state = State.IN_EVALUATE;
    }

    public void toAfterEvaluate() {
        assert state == State.IN_EVALUATE;
        state = State.IN_AFTER_EVALUATE;