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scalaexceptionscalatestassertion

Which is better among ShouldBe vs ShouldEqual for comparing two exception objects

I have a code which returns exception object from future

val actual = doSomething(x).failed.futureValue
val expected = new SomeException()

Which is the best way to assert them

actual shouldEqual expected OR actual shouldBe expected

??

Solution

  • As far as I know there is no difference, but shouldEqual is commonly used when you define your own instance of Equality trait. So, it's up to you what method to choose.

    Update

    But you won't be able to compare exception because exceptions from Standard Library of Java (and Scala) don't override equals(). But it will be OK if you use your own exceptions with overriden method equals().