Hi guys, just general knowledge question about test case. How may test should case will be used in this piece of code

internal fun checkRange(valueOne: Int, valueTwo: Int): Boolean {
    val rangeInValueOne = 0..10
    val rangeInValueTwo = 20..30
    return (valueOne in rangeInValueOne && valueTwo in rangeInValueTwo)
}

?

Some would say that every range check could have 4 tests.: At the lower bound and IN. At the Lower bound but Out, At the higher bound and IN. At the higher bound but Out,

So what is the right way to do test. I am just want feedback for you guys.

(0, 20) -> true (10, 30) -> true (-1, 20) -> false (11, 20) -> false (0, 19) -> false (0, 31) -> false