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https://github.com/apple/swift.git
synced 2026-06-20 15:42:51 +02:00
Clinton Nkwocha
304335e3e8
Adds `Hashable` conformance to `Dictionary.Keys`, `CollectionOfOne` and `EmptyCollection`. _Proposal: [SE-0514](https://github.com/swiftlang/swift-evolution/blob/main/proposals/0514-hashable-conformance-for-dictionarykeys-collectionofone-emptycollection.md)_
37 lines
1.2 KiB
Swift
37 lines
1.2 KiB
Swift
//===--- DictionaryKeys.swift ----------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2026 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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// RUN: %target-run-simple-swift
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// REQUIRES: executable_test
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import StdlibUnittest
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var testSuite = TestSuite("DictionaryKeys")
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let multipleElementDict = ["One": 1, "Two": 2, "Three": 3, "Four": 4, "Five": 5]
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let multipleElementDictMixedAndMatched = ["Five": 2, "One": 1, "Four": 4, "Three": 5, "Two": 3]
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let singleElementDict = ["One": 1]
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let emptyDict = [String: Int]()
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if #available(SwiftStdlib 6.4, *) {
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testSuite.test("Hashable") {
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let keys = [multipleElementDict.keys, singleElementDict.keys, emptyDict.keys]
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checkHashable(keys, equalityOracle: { keys[$0] == keys[$1] })
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}
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testSuite.test("OrderIndependentHashing") {
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checkHashable(expectedEqual: true, multipleElementDict.keys, multipleElementDictMixedAndMatched.keys)
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}
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}
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runAllTests()
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