dSbcRprD

1import UIKit
2import XCTest
3
4extension String {
5    public subscript(integerRange: Range<Int>) -> String {
6        let start = index(startIndex, offsetBy: integerRange.lowerBound)
7        let end = index(startIndex, offsetBy: integerRange.upperBound)
8        return String(self[start..<end])
9    }
10}
11
12var allowedDomainNames = ["gmail.com", "ya.ru"]
13
14func checkDomainName(email: String) -> Bool {
15    if let index = email.range(of: "@")?.upperBound.encodedOffset {
16        let userDomain = String(email[index ..< email.count])
17        return allowedDomainNames.contains(userDomain.lowercased())
18    }
19    return false
20}
21
22func checkDomainName1(email: String) -> Bool {
23    guard let index = email.range(of: "@")?.upperBound else {
24        return false
25    }
26    let userDomain = email[index...]
27    return allowedDomainNames.contains(userDomain.lowercased())
28}
29
30func checkDomainName2(email: String) -> Bool {
31    return allowedDomainNames.contains {
32        email.lowercased().hasSuffix("@\($0)")
33    }
34}
35
36class MyTestOne: XCTestCase {
37    
38    func testOne()  {
39       XCTAssertTrue(checkDomainName(email: "qweqwe@gmail.com"))
40       XCTAssertTrue(checkDomainName(email: "qweqwe@ya.ru"))
41       XCTAssertFalse(checkDomainName(email: "qweqwe@1gmail.com"))
42       XCTAssertFalse(checkDomainName(email: "qweqwe@qeqrwer"))
43       XCTAssertFalse(checkDomainName(email: "qweqwe@"))
44       XCTAssertFalse(checkDomainName(email: "qweqwe"))
45    }
46}
47
48class MyTestTwo: XCTestCase {
49    func testTwo()  {
50        
51        XCTAssertTrue(checkDomainName1(email: "qweqwe@gmail.com"))
52        XCTAssertTrue(checkDomainName1(email: "qweqwe@ya.ru"))
53        XCTAssertFalse(checkDomainName1(email: "qweqwe@1gmail.com"))
54        XCTAssertFalse(checkDomainName1(email: "qweqwe@qeqrwer"))
55        XCTAssertFalse(checkDomainName1(email: "qweqwe@"))
56        XCTAssertFalse(checkDomainName1(email: "qweqwe"))
57    }
58}
59    
60class MyTestThree: XCTestCase {
61    func testThree()  {
62        XCTAssertTrue(checkDomainName2(email: "qweqwe@gmail.com"))
63        XCTAssertTrue(checkDomainName2(email: "qweqwe@ya.ru"))
64        XCTAssertFalse(checkDomainName2(email: "qweqwe@1gmail.com"))
65        XCTAssertFalse(checkDomainName2(email: "qweqwe@qeqrwer"))
66        XCTAssertFalse(checkDomainName2(email: "qweqwe@"))
67        XCTAssertFalse(checkDomainName2(email: "qweqwe"))
68    }
69}
70
71MyTestOne().run()
72MyTestTwo().run()
73MyTestThree().run()