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// RUN: %target-run-stdlib-swift(-enable-experimental-feature LifetimeDependence) %S/Inputs/
// REQUIRES: swift_feature_LifetimeDependence
// REQUIRES: executable_test
import Swift
import StdlibUnittest
var suite = TestSuite("UTF8SpanIterator")
defer { runAllTests() }
@available(SwiftStdlib 6.2, *)
extension Array {
func withSpan<R>(_ f: (Span<Element>) throws -> R) rethrows -> R {
try self.withUnsafeBufferPointer {
try f(Span(_unsafeElements: $0))
}
}
}
@available(SwiftStdlib 6.2, *)
extension UTF8Span {
func withSpan<R>(_ f: (Span<UInt8>) throws -> R) rethrows -> R {
try self._withUnsafeBufferPointer {
try f(Span(_unsafeElements: $0))
}
}
}
//
@available(SwiftStdlib 6.2, *)
struct ContentEquivalenceTestCase {
var str: String
var loc: SourceLocStack
}
@available(SwiftStdlib 6.2, *)
extension ContentEquivalenceTestCase {
func expectStart(
_ scalars: inout UTF8Span.UnicodeScalarIterator
) {
let firstScalar = str.unicodeScalars.first
expectEqual(0, scalars.currentCodeUnitOffset, stackTrace: loc)
expectNil(scalars.previous(), stackTrace: loc)
expectEqual(firstScalar, scalars.next(), stackTrace: loc)
expectEqual(firstScalar, scalars.previous(), stackTrace: loc)
expectNil(scalars.previous(), stackTrace: loc)
}
func expectEnd(
_ scalars: inout UTF8Span.UnicodeScalarIterator
) {
let lastScalar = str.unicodeScalars.last
expectEqual(scalars.currentCodeUnitOffset, scalars.codeUnits.count, stackTrace: loc)
expectNil(scalars.next(), stackTrace: loc)
expectEqual(lastScalar, scalars.previous(), stackTrace: loc)
expectEqual(lastScalar, scalars.next(), stackTrace: loc)
expectNil(scalars.next(), stackTrace: loc)
}
func expectStart(
_ chars: inout UTF8Span.CharacterIterator
) {
let firstChar = str.first
expectEqual(0, chars.currentCodeUnitOffset, stackTrace: loc)
expectNil(chars.previous(), stackTrace: loc)
expectEqual(firstChar, chars.next(), stackTrace: loc)
expectEqual(firstChar, chars.previous(), stackTrace: loc)
expectNil(chars.previous(), stackTrace: loc)
}
func expectEnd(
_ chars: inout UTF8Span.CharacterIterator
) {
let lastChar = str.last
expectEqual(chars.currentCodeUnitOffset, chars.codeUnits.count, stackTrace: loc)
expectNil(chars.next(), stackTrace: loc)
expectEqual(lastChar, chars.previous(), stackTrace: loc)
expectEqual(lastChar, chars.next(), stackTrace: loc)
expectNil(chars.next(), stackTrace: loc)
}
func withUTF8Span<R>(_ f: (UTF8Span) throws -> R) rethrows -> R {
try Array(str.utf8).withSpan { span in
try f(try! UTF8Span(validating: span))
}
}
}
@available(SwiftStdlib 6.2, *)
extension ContentEquivalenceTestCase {
func testBytes() {
let otherBytes = Array((str+"abc").utf8)
withUTF8Span { utf8Span in
utf8Span._withUnsafeBufferPointer {
expectEqualSequence(str.utf8, $0, stackTrace: loc)
}
}
// NOTE: There's a slight jarring due to not having the same
// iterators for code units
}
func testScalars() {
withUTF8Span { utf8Span in
// Test forwards
var utf8SpanIter = utf8Span.makeUnicodeScalarIterator()
var stringIter = str.unicodeScalars.makeIterator()
while let scalar = utf8SpanIter.next() {
expectEqual(scalar, stringIter.next(), stackTrace: loc)
}
expectNil(stringIter.next(), stackTrace: loc)
expectEnd(&utf8SpanIter)
// Test backwards
var stringRevIter = str.unicodeScalars.reversed().makeIterator()
while let scalar = utf8SpanIter.previous() {
expectEqual(scalar, stringRevIter.next(), stackTrace: loc)
}
expectNil(stringRevIter.next(), stackTrace: loc)
expectStart(&utf8SpanIter)
let numElements = str.unicodeScalars.count
let lastElement = str.unicodeScalars.last
let firstElement = str.unicodeScalars.first
expectEqual(numElements, utf8SpanIter.skipForward(by: Int.max))
expectEnd(&utf8SpanIter)
expectEqual(numElements, utf8SpanIter.skipBack(by: Int.max))
expectStart(&utf8SpanIter)
expectEqual(numElements, utf8SpanIter.skipForward(by: numElements))
expectEnd(&utf8SpanIter)
expectEqual(numElements, utf8SpanIter.skipBack(by: numElements))
expectStart(&utf8SpanIter)
if numElements > 0 {
expectStart(&utf8SpanIter)
expectEqual(numElements-1, utf8SpanIter.skipForward(by: numElements-1))
expectEqual(lastElement, utf8SpanIter.next())
expectEnd(&utf8SpanIter)
expectEqual(numElements-1, utf8SpanIter.skipBack(by: numElements-1))
expectEqual(firstElement, utf8SpanIter.previous())
expectStart(&utf8SpanIter)
}
// TODO: test reset variants
// TODO: test prefix/suffix
}
}
func testCharacters() {
withUTF8Span { utf8Span in
// Test forwards
var utf8SpanIter = utf8Span.makeCharacterIterator()
var stringIter = str.makeIterator()
while let char = utf8SpanIter.next() {
expectEqual(char, stringIter.next(), stackTrace: loc)
}
expectNil(stringIter.next(), stackTrace: loc)
expectEnd(&utf8SpanIter)
// Test backwards
var stringRevIter = str.reversed().makeIterator()
while let char = utf8SpanIter.previous() {
expectEqual(char, stringRevIter.next(), stackTrace: loc)
}
expectNil(stringRevIter.next(), stackTrace: loc)
expectStart(&utf8SpanIter)
let numElements = str.count
let lastElement = str.last
let firstElement = str.first
expectEqual(numElements, utf8SpanIter.skipForward(by: Int.max))
expectEnd(&utf8SpanIter)
expectEqual(numElements, utf8SpanIter.skipBack(by: Int.max))
expectStart(&utf8SpanIter)
expectEqual(numElements, utf8SpanIter.skipForward(by: numElements))
expectEnd(&utf8SpanIter)
expectEqual(numElements, utf8SpanIter.skipBack(by: numElements))
expectStart(&utf8SpanIter)
if numElements > 0 {
expectStart(&utf8SpanIter)
expectEqual(numElements-1, utf8SpanIter.skipForward(by: numElements-1))
expectEqual(lastElement, utf8SpanIter.next())
expectEnd(&utf8SpanIter)
expectEqual(numElements-1, utf8SpanIter.skipBack(by: numElements-1))
expectEqual(firstElement, utf8SpanIter.previous())
expectStart(&utf8SpanIter)
}
// TODO: test reset variants
// TODO: test prefix/suffix
}
}
func run() {
testBytes()
testScalars()
testCharacters()
// TODO: test grapheme break iterator
}
}
if #available(SwiftStdlib 6.2, *) {
suite.test("UTF8Span/iterators") {
func test(
_ s: String,
file: String = #file,
line: UInt = #line
) {
// print("testing: \(s)")
let t = ContentEquivalenceTestCase(
str: s, loc: .init(SourceLoc(file, line)))
t.run()
}
test("")
test("a")
test("รก")
test("a\u{301}")
test("๐งโโ๏ธ")
test("abc")
test("abcde\u{301}")
test("abรฉร๐")
test("012345678901234567890")
test("abรฉร012345678901234567890๐")
test("๐๐๐คข๐คฎ๐ฉ๐ฟโ๐ค๐ง๐ปโโ๏ธ๐ง๐ปโโ๏ธ๐ฉโ๐ฉโ๐ฆโ๐ฆ")
test("defghijklmnopqrstuvwxyz")
test("ab๐งโโ๏ธde\u{301}bytรฉs")
test("ab๐งโโ๏ธde\u{301}๐งโโ๏ธ")
test("ab๐งโโ๏ธde๐งโโ๏ธ\u{301}")
}
}
// @available(SwiftStdlib 6.2, *)
// extension UTF8Span {
// func splitOffASCIIPrefix() -> (UTF8Span, UTF8Span) {
// if isKnownASCII {
// return (self, .init())
// }
// var splitPoint = 0
// while splitPoint < codeUnits.count && codeUnits[unchecked: split] < 0x80 {
// splitPoint += 1
// }
// }
// }
if #available(SwiftStdlib 6.2, *) {
suite.test("UTF8Span/whatever") {
// var badURLBytes: [UInt8] = []
// badURLBytes.append(contentsOf: "http://servername/scripts/..".utf8)
// // Invalid overlong encoding of "/"
// badURLBytes.append(contentsOf: [0xC0, 0xAF])
// badURLBytes.append(contentsOf: "../winnt/system32/cmd.exe".utf8)
// // try! UTF8Span(validating: badURLBytes.span)
// badURLBytes.withSpan {
// try! UTF8Span(validating: $0)
// }
}
}
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