A faulty unit test, where only one side-effect is tested, giving me credit for full function coverage

DetailsViewMvcImplTest.kt

class DetailsViewMvcImplTest : Spek({

    describe("The DetailsViewMvcImpl") {

        var mockButton: MaterialButton? = null
        var mockPhoto: AppCompatImageView? = null
        var mockRootView: View? = null
        var mockTitle: AppCompatTextView? = null

        var uut: DetailsViewMvcImpl? = null

        beforeEachTest {
            // Setup the mocks and UUT here
        }

        describe("when init") {

            it("inflates the layout and sets it as the root view") {
                expect(uut?.rootView).to.equal(mockRootView)
            }
        }
    }
}