| // This source file is part of the Swift.org open source project |
| // |
| // Copyright (c) 2014 - 2016 Apple Inc. and the Swift project authors |
| // Licensed under Apache License v2.0 with Runtime Library Exception |
| // |
| // See http://swift.org/LICENSE.txt for license information |
| // See http://swift.org/CONTRIBUTORS.txt for the list of Swift project authors |
| // |
| // |
| // XCPredicateExpectationHandler.swift |
| // A closure invoked by XCTestCase when a predicate for the expectation is |
| // evaluated with a given object. |
| // |
| |
| /// A block to be invoked when evaluating the predicate against the object |
| /// returns true. If the block is not provided the first successful evaluation |
| /// will fulfill the expectation. If provided, the handler can override that |
| /// behavior which leaves the caller responsible for fulfilling the expectation. |
| public typealias XCPredicateExpectationHandler = () -> (Bool) |
