Hey, arrow fans. I released version 0.2.0 of the

assertj-arrow-core

library 🚀 . If you want the complete list of changes, check it out here. This version makes a new list of RaiseE assertions available 😍 . Say that you have a function in the

Raise<E>

context and want to know if it succeeded with a specific value. Nothing easier!

context (Raise<String>)
fun aFunctionWithContext(input: Int): Int = input

@Test
internal fun `should pass if lambda succeeds with the given value`() {
    assertThat { aFunctionWithContext(42) }.succeedsWith(42)
}

Same thing if you want to check if the function fails with an specific error:

context (Raise<String>)
fun aFunctionThatRaisesAnError(): Int = raise("LOGICAL ERROR")

@Test
internal fun `should pass if lambda raises a logical error`() {
    assertThat { aFunctionThatRaisesAnError() }.raises("LOGICAL ERROR")
}

Happy coding! 🎉