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// 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
//
class TestNSCompoundPredicate: XCTestCase {
private func eval(_ predicate: NSPredicate, object: NSObject = NSObject()) -> Bool {
return predicate.evaluate(with: object, substitutionVariables: nil)
}
func test_NotPredicate() {
let notTruePredicate = NSCompoundPredicate(notPredicateWithSubpredicate: NSPredicate(value: true))
let notFalsePredicate = NSCompoundPredicate(notPredicateWithSubpredicate: NSPredicate(value: false))
XCTAssertFalse(eval(notTruePredicate))
XCTAssertTrue(eval(notFalsePredicate))
}
func test_AndPredicateWithNoSubpredicates() {
let predicate = NSCompoundPredicate(andPredicateWithSubpredicates: [])
XCTAssertTrue(eval(predicate))
}
func test_AndPredicateWithOneSubpredicate() {
let truePredicate = NSCompoundPredicate(andPredicateWithSubpredicates: [NSPredicate(value: true)])
let falsePredicate = NSCompoundPredicate(andPredicateWithSubpredicates: [NSPredicate(value: false)])
XCTAssertTrue(eval(truePredicate))
XCTAssertFalse(eval(falsePredicate))
}
func test_AndPredicateWithMultipleSubpredicates() {
let truePredicate = NSCompoundPredicate(andPredicateWithSubpredicates: [NSPredicate(value: true), NSPredicate(value: true)])
let falsePredicate = NSCompoundPredicate(andPredicateWithSubpredicates: [NSPredicate(value: true), NSPredicate(value: false)])
XCTAssertTrue(eval(truePredicate))
XCTAssertFalse(eval(falsePredicate))
}
func test_OrPredicateWithNoSubpredicates() {
let predicate = NSCompoundPredicate(orPredicateWithSubpredicates: [])
XCTAssertFalse(eval(predicate))
}
func test_OrPredicateWithOneSubpredicate() {
let truePredicate = NSCompoundPredicate(orPredicateWithSubpredicates: [NSPredicate(value: true)])
let falsePredicate = NSCompoundPredicate(orPredicateWithSubpredicates: [NSPredicate(value: false)])
XCTAssertTrue(eval(truePredicate))
XCTAssertFalse(eval(falsePredicate))
}
func test_OrPredicateWithMultipleSubpredicates() {
let truePredicate = NSCompoundPredicate(orPredicateWithSubpredicates: [NSPredicate(value: true), NSPredicate(value: false)])
let falsePredicate = NSCompoundPredicate(orPredicateWithSubpredicates: [NSPredicate(value: false), NSPredicate(value: false)])
XCTAssertTrue(eval(truePredicate))
XCTAssertFalse(eval(falsePredicate))
}
func test_AndPredicateShortCircuits() {
var shortCircuited = true
let bOK = NSPredicate(value: false)
let bDontEval = NSPredicate(block: { (_, _) in
shortCircuited = false
return true
})
let both = NSCompoundPredicate(andPredicateWithSubpredicates: [bOK, bDontEval])
XCTAssertFalse(eval(both))
XCTAssertTrue(shortCircuited)
}
func test_OrPredicateShortCircuits() {
var shortCircuited = true
let bOK = NSPredicate(value: true)
let bDontEval = NSPredicate(block: { (_, _) in
shortCircuited = false
return true
})
let both = NSCompoundPredicate(orPredicateWithSubpredicates: [bOK, bDontEval])
XCTAssertTrue(eval(both))
XCTAssertTrue(shortCircuited)
}
}
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