I am wondering about the best approach to deal wit...

# kotest

[dirk.dittert]

I am wondering about the best approach to deal with comparing multi-line strings to expected values. I ran into the following setup a couple of times now:

val data = readSomeData() // reads a file from /src/test/resources
val actual = mangle(data)
actual shouldBe """
    line 1
    line 2
    """.trimIndent()

The problem is that line separators can be different between the file and Kotlin multiline strings. How to deal with that in the most convenient way possible?

[Klitos Kyriacou]

One way I might do it is actual.lines().shouldContainExactly("line 1", "line 2")

[dirk.dittert]

I haven't tried that yet. So far, I have only played with replacing line separators.

[dirk.dittert]

it looses the easily readable multi-line string, though

[Klitos Kyriacou]

One problem you might encounter when using trimIndent is that it swallows the last line terminator, so if your data ends with a newline, it won't match. With lines() you get a blank last line.

[dirk.dittert]

I think, I'll go with a custom matcher that ignores the line separators. I can handle all the special cases inside that code.

[Emil Kantis]

Hmm.. iirc there was a proposal to create an assertion/matcher for strings that ignore lind endings

[Emil Kantis]

https://github.com/kotest/kotest/issues/3161

[Alex Kuznetsov]

note that String matching gets a lot of improvements in 6.0