st-examples.scala

scala> import org.scalatest._
scala> import Matchers._
scala> import Inspectors._

scala> trap { List('a', 'b') should have length 1 }
res0: Throwable = org.scalatest.exceptions.TestFailedException: List(a, b) had length 2 instead of expected length 1

scala> trap { List(1, 2, 3) should contain (4) }
res1: Throwable = org.scalatest.exceptions.TestFailedException: List(1, 2, 3) did not contain element 4

scala> trap { forEvery (List(1, 2, 3)) { x => x should be < 2 } }
res2: Throwable =
org.scalatest.exceptions.TestFailedException: forEvery failed, because:
  at index 1, 2 was not less than 2 (<console>:21),
  at index 2, 3 was not less than 2 (<console>:21)
in List(1, 2, 3)

scala> import org.scalautils.StringNormalizations._
scala> trap { (Array("Doe", "Me") should contain oneOf ("X", "RAY", "BEAM")) (after being lowerCased) }
res3: Throwable = org.scalatest.exceptions.TestFailedException: Array(Doe, Me) did not contain one of ("X", "RAY", "BEAM")

Hi Paul,

By the way, in 2.1.0-RC3 I added toEquality and toEquivalance methods to Uniformity and Normalization, so that you need not use the English-like syntax to go, for example, from a Uniformity to an Equality. Instead of:

(result === "hello")(after being lowerCased)

You can just write:

(result === "hello")(lowerCased.toEquality)

I got the memo from multiple sources that even some of the folks who like seeing English-like DSLs in test code don't want to see it in the production code.

Bill