The

assertFalse

function in Kotlin test requires a non null boolean. What is the most idiomatic way to handle a nullable boolean?

assertFalse(condition ?: true)

is one. We could also invert it and say

assertTrue(condition == false)

but honestly I wish I could just pass a nullable boolean. I'm not sure why we couldn't.

I would prefer the latter of the two. Maybe its because I use hamkrest where its just

assertThat(condition, equalTo(false))

You can define own assertFalse that concider null as false, if it make sense for your usecase. But it shouldn't be default behavior Also official style guide recommends to use == instead of ?: for nullable booleans