PredicateStatus

Matches indicates if the predicate / matcher passes with the given value

For example, equals(1) returns .matches for expect(1).to(equal(1)).

DoesNotMatch indicates if the predicate / matcher fails with the given value, but would succeed if the expectation was inverted.

For example, equals(2) returns .doesNotMatch for expect(1).toNot(equal(2)).

Fail indicates the predicate will never satisfy with the given value in any case. A perfect example is that most matchers fail whenever given nil.

Using equal(1) fails both expect(nil).to(equal(1)) and expect(nil).toNot(equal(1)). Note: Predicate’s requireNonNil property will also provide this feature mostly for free. Your predicate will still need to guard against nils, but error messaging will be handled for you.

Converts a boolean to either .matches (if true) or .doesNotMatch (if false).

Undocumented