One question regarding collections,: In my project...

# atrium

[Igor Akkerman]

One question regarding collections,: In my project, the lists are quite large, is there a way to specify (for in order comparisons) to only show the wrong values so that you don't have to search the front x's through the whole list?

[robstoll]

Not yet out of the box but please open an issue for it, I'll provide a flag for this

[Igor Akkerman]

Great, will do that, thank you!

[robstoll]

do you deal with `List`s?

[Igor Akkerman]

Yes

[robstoll]

and do you check against values or do you specify sub-assertions?

[robstoll]

based on your last question I guess sub-assertions:
You could use the following function in the meantime:

fun <E, T : List<E>> Expect<T>.containsInOrderOnly(vararg assertionCreators: Expect<E>.() -> Unit): Expect<T> =
    and {
        assertionCreators.forEachIndexed { index, assertionCreator ->
            get(index, assertionCreator)
        }
    }

[robstoll]

remove the and in case you want fail-fast behaviour

[Igor Akkerman]

just values in that case

[robstoll]

from another list?

[Igor Akkerman]

the subject is a list, the arguments of containsExactly are varargs

[robstoll]

assuming you are not dealing with nullable values

fun <E: Any, T : List<E>> Expect<T>.containsInOrderOnly(vararg values: E): Expect<T> =
    and {
        values.forEachIndexed { index, value ->
            get(index).toBe(value)
        }
    }

[Igor Akkerman]

Wow, excellent, thanks!

[robstoll]

no worries, but please still create an issue, it makes more sense that this can be configured somehow instead of a separate function

[robstoll]

otherwise you could still use:

fun <E> Expect<Sequence<E>>.asList(): Expect<List<E>> = ExpectImpl.changeSubject(this).unreported { it.toList() }

and then the function above. But note that ExpectImpl is not stable yet and most likely changes

[Igor Akkerman]

cool, thanks a lot

[robstoll]

you're welcome

[Igor Akkerman]

I created the issue on GitHub, as discussed: https://github.com/robstoll/atrium/issues/292