Hi! Is there a more elegant way to assert that an ...

# kotest

[Olai Solheim]

Hi! Is there a more elegant way to assert that an object is both non-null and assert its contents than this?

Untitled.kt

[Davis Mohar]

person
  .shouldNotBeNull()
  .name.shouldBe("Donald Duck")

[Olai Solheim]

Nice, thanks! Quick and easy. 🙂

[Olai Solheim]

How would you do it if I want to assert for other fields as well? let?

[Davis Mohar]

Yep! That's how I tend to do it:

person
  .shouldNotBeNull()
  .let{
     it.name.shouldBe("Donald Duck")
     it.someOtherField.shouldBe("foo")
   }

[sam]

or if you want to avoid the it. you can use .apply

[sam]

either or

[Olai Solheim]

Ah yes, that makes it even shorter, thanks. 🙂

[LeoColman]

I usually just go

person shouldBe Person("Donald Duck", "Foo")

[LeoColman]

It it's null the test will crash anyway

[phldavies]

I tend to go with

person should { 
    it.shouldNotBeNull()
    it.name shouldBe "Donald Duck"
    it.someOtherField shouldBe "foo"
}

although I’ve always thought infix fun <T> T.should(matcher: (T) -> Unit) = matcher(this) would be nicer as infix fun <T> T.should(matches: T.() -> Unit) = this.matches()