Test expected exceptions in Kotlin

Question

In Java, the programmer can specify expected exceptions for JUnit test cases like this:

@Test(expected = ArithmeticException.class)
public void omg()
{
    int bl         


        

Answer 1

You can use @Test(expected = ArithmeticException::class) or even better one of Kotlin's library methods like failsWith().

You can make it even shorter by using reified generics and a helper method like this:

inline fun  failsWithX(noinline block: () -> Any) {
    kotlin.test.failsWith(javaClass(), block)
}

And example using the annotation:

@Test(expected = ArithmeticException::class)
fun omg() {

}