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37 lines
1.3 KiB
Swift
37 lines
1.3 KiB
Swift
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// Copyright (c) 2014 - 2017 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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//
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// RUN: %empty-directory(%t)
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// RUN: %target-build-swift -swift-version 4 %s -o %t/TestData_Swift4
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// RUN: %target-codesign %t/TestData_Swift4
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// RUN: %target-run %t/TestData_Swift4
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// REQUIRES: executable_test
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// REQUIRES: objc_interop
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import Foundation
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import StdlibUnittest
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var DataTests = TestSuite("TestDataSwift4")
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DataTests.test("functional map init usage") {
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let res1 = [[UInt8(0), UInt8(1), UInt8(2)]].map(Data.init) // previously this could be done without being ambiguous (however in swift 4.2 an overload was added that makes it ambiguous as a function ref)
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// the following two strategies are preferred to the previous version
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let res2 = [[UInt8(0), UInt8(1), UInt8(2)]].map(Data.init(_:))
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let res3 = [[UInt8(0), UInt8(1), UInt8(2)]].map { Data($0) }
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expectEqual(res1.count, 1)
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expectEqual(res2.count, 1)
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expectEqual(res3.count, 1)
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expectEqual(res1[0], res2[0])
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expectEqual(res2[0], res3[0])
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}
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runAllTests()
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