Testing Model rules

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This is basically the question asked here. Yes, I’d say this is really the only way to do unit testing right now. There is a possibility we’ll add better fixture support here.

Your other alternative is to use functional testing via TestKit for this and embed your assertions in an actual task.

@Managed
interface Person {
    String getName()
    void setName(String s)
}

class Rules extends RuleSource {
    @Model
    void person(Person p) { }
    
    @Mutate
    void testRule(Person p) {
        p.name = 'Bob'
    }
}

apply plugin: Rules

model {
    tasks {
        assertModel(Task) {
            doLast {
                assert $.person.name == 'Bob'
            }
        }
    }
}
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