| // RUN: %target-run-simple-swift |
| // REQUIRES: executable_test |
| |
| import StdlibUnittest |
| defer { runAllTests() } |
| |
| var StringCreateTests = TestSuite("StringCreateTests") |
| |
| enum SimpleString: String { |
| case smallASCII = "abcdefg" |
| case smallUnicode = "abéÏ𓀀" |
| case largeASCII = "012345678901234567890" |
| case largeUnicode = "abéÏ012345678901234567890𓀀" |
| case emoji = "😀😃🤢🤮👩🏿🎤🧛🏻♂️🧛🏻♂️👩👩👦👦" |
| } |
| |
| let simpleStrings: [String] = [ |
| SimpleString.smallASCII.rawValue, |
| SimpleString.smallUnicode.rawValue, |
| SimpleString.largeASCII.rawValue, |
| SimpleString.largeUnicode.rawValue, |
| SimpleString.emoji.rawValue, |
| "", |
| ] |
| |
| extension String { |
| var utf32: [UInt32] { return unicodeScalars.map { $0.value } } |
| } |
| |
| StringCreateTests.test("String(decoding:as)") { |
| func validateDecodingAs(_ str: String) { |
| // Non-contiguous (maybe) storage |
| expectEqual(str, String(decoding: str.utf8, as: UTF8.self)) |
| expectEqual(str, String(decoding: str.utf16, as: UTF16.self)) |
| expectEqual(str, String(decoding: str.utf32, as: UTF32.self)) |
| |
| // Contiguous storage |
| expectEqual(str, String(decoding: Array(str.utf8), as: UTF8.self)) |
| expectEqual(str, String(decoding: Array(str.utf16), as: UTF16.self)) |
| expectEqual(str, String(decoding: Array(str.utf32), as: UTF32.self)) |
| |
| } |
| |
| for str in simpleStrings { |
| validateDecodingAs(str) |
| } |
| |
| // Corner-case: UBP with null pointer (https://bugs.swift.org/browse/SR-9869) |
| expectEqual( |
| "", String(decoding: UnsafeBufferPointer(_empty: ()), as: UTF8.self)) |
| expectEqual( |
| "", String(decoding: UnsafeBufferPointer(_empty: ()), as: UTF16.self)) |
| expectEqual( |
| "", String(decoding: UnsafeBufferPointer(_empty: ()), as: UTF32.self)) |
| } |
| |