Is it possible, in ScalaTest, to express assertions on arbitrary properties that do more than simple equality comparisons on the values of those properties?
For example, instead of:
val list = List(1,2,3,4,5)
list.length should be < 4 // Fails with the unhelpful error message "5 is not less than 4"
case class Example(field: String)
val obj = Example("TEST")
obj.field should be allLowerCase // Given "allLowerCase", this fails without any information about obj.
I'd like to do something like the following:
val list = List(1,2,3,4,5)
list should have length < 4 // Fails with an error message containing the list
obj should have ('field (allLowerCase)) // Fails with an error message containing obj.
The goal is to have the relevant context about the object with the failing property in the error message if the matcher fails.
