initial_matcher.swift

private func beInitial() -> Predicate<SearchTableViewController.State> {
    return Predicate.define("be <initial>") { expression, message in
        if let actual = try expression.evaluate(), case .initial = actual {
            return PredicateResult(status: .matches, message: message)
        }
        return PredicateResult(status: .fail, message: message)
    }
}