Hey all, how do I force kotest to show ' character...

# kotest

[mat]

Hey all, how do I force kotest to show ' characters around strings in failure output? I'm dealing with strings that can have several newlines at the end. For example:

[sam]

Something we need to improve really. The Print typeclass could do with an overhaul. PR?

[mat]

I should be able to take a look at the code there this weekend at the latest. Could you explain what places I need to look at to change this?

[sam]

If you look for the interface Print and then look at the implementations, that's what does it

[mat]

Alright, I have made a reproduction of the issue. Wil now try and find the cause:

test("TestShouldBeEqual") {
        "test\n\n" shouldBeEqual "\n"
    }
    test("TestShouldBe") {
        "test\n\n" shouldBe "\n"
    }

The test that uses shouldBe shows a nice error message:

io.kotest.assertions.AssertionFailedError: expected:<"
"> but was:<"test

">

The test that uses shouldBeEqual shows this worse error message:

java.lang.AssertionError: test

 should be equal to 

	at FakeTest$1$1.invokeSuspend(FakeTest.kt:7)

Note how the nice error is from a kotest assertion, and the ugly one is from a java lang assertion. I believe that this is the cause.

[mat]

I have found the implementation difference that causes this:

In shouldBe, the Matcher system is used to print via the Print typeclass (Via shouldBe should, invokeMatcher, expected.print()).
In shouldBeEqual a MatcherResult is created directly using string interpolation. (eg: "$value should be equal to $expected"). This, of course, will not call upon the typeclass.

I can make the change in the file, but I cannot figure out how to test these changes. I'll move to the dev channel to ask there and will report back here if I was successful.