How to compare String Arrays with JUnit in Scala

Question

I was trying to compare to String Arrays in a JUnit test suite in Scala using assertArrayEquals. It works fine for basic types like Int or Boolean, however it issues the following error when applying it to String:

overloaded method value toString with alternatives: (x$1: Array[Object])String (x$1: Array[Double])String (x$1: Array[Float])String (x$1: Array[Boolean])String (x$1: Array[Byte])String (x$1: Array[Char])String (x$1: Array[Short])String (x$1: Array[Int])String (x$1: Array[Long])String cannot be applied to (Array[String])

This seems weird to me since using the same method in a Java environment works without a problem. Is there a way to circumvent this?

Hint: use assertThat(actual, is(whatever)). Works for almost everything. — GhostCat
– GhostCat, Commented Sep 30, 2016 at 8:42
Thanks for the quick accept. Looking forward to "work" with you again ;-) — GhostCat
– GhostCat, Commented Sep 30, 2016 at 8:58

GhostCat · Accepted Answer · 2016-09-30 08:51:56Z

1

My "general" answer: one only needs one assert; and that is assertThat. That assert works with Hamcrest matchers, so typically you write down

assertThat(expected, is(whatever))

And using the wide range of existing hamcrest matchers, you immediately get "expected" results; even for collections and such things.

And if the standard means don't work; writing custom matchers is a straight forward task, too.

So, long story short: just use that assert that simply works.

answered Sep 30, 2016 at 8:51

GhostCat

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