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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2021-2022 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
//
//===----------------------------------------------------------------------===//
@testable import _RegexParser
import XCTest
@testable import _StringProcessing
func diagnose(
_ input: String,
expecting expected: ParseError,
_ syntax: SyntaxOptions = .traditional,
_ f: (inout Parser) -> (),
file: StaticString = #file,
line: UInt = #line
) {
var parser = Parser(Source(input), syntax: syntax)
f(&parser)
let diags = parser.diags.diags
guard diags.count == 1 else {
XCTFail("""
Expected single diagnostic
""", file: file, line: line)
return
}
let error = diags[0].underlyingParseError!
guard error == expected else {
XCTFail("""
Expected: \(expected)
Actual: \(error)
""", file: file, line: line)
return
}
}
extension RegexTests {
func testLexicalAnalysis() {
diagnose("a", expecting: .expected("b")) { p in
p.expect("b")
}
diagnose("", expecting: .unexpectedEndOfInput) { p in
p.expectNonEmpty()
}
diagnose("a", expecting: .unexpectedEndOfInput) { p in
p.expect("a") // Ok
p.expectNonEmpty() // Error
}
let bigNum = "12345678901234567890"
diagnose(bigNum, expecting: .numberOverflow(bigNum)) { p in
_ = p.lexNumber()
}
// TODO: want to dummy print out source ranges, etc, test that.
}
func testCompilerInterface() throws {
func delim(_ kind: Delimiter.Kind, poundCount: Int = 0) -> Delimiter {
Delimiter(kind, poundCount: poundCount)
}
let testCases: [(String, (String, Delimiter)?)] = [
("/abc/", ("abc", delim(.forwardSlash))),
("#/abc/#", ("abc", delim(.forwardSlash, poundCount: 1))),
("###/abc/###", ("abc", delim(.forwardSlash, poundCount: 3))),
("#|abc|#", ("abc", delim(.experimental))),
// Multiline
("#/\na\nb\n/#", ("\na\nb\n", delim(.forwardSlash, poundCount: 1))),
("#/ \na\nb\n /#", (" \na\nb\n ", delim(.forwardSlash, poundCount: 1))),
("##/ \na\nb\n /##", (" \na\nb\n ", delim(.forwardSlash, poundCount: 2))),
// TODO: Null characters are lexically valid, similar to string literals,
// but we ought to warn the user about them.
("#|ab\0c|#", ("ab\0c", delim(.experimental))),
("'abc'", nil),
("#/abc/def/#", ("abc/def", delim(.forwardSlash, poundCount: 1))),
("#|abc|def|#", ("abc|def", delim(.experimental))),
("#/abc\\/#def/#", ("abc\\/#def", delim(.forwardSlash, poundCount: 1))),
("#|abc\\|#def|#", ("abc\\|#def", delim(.experimental))),
("#/abc|#def/#", ("abc|#def", delim(.forwardSlash, poundCount: 1))),
("#|abc/#def|#", ("abc/#def", delim(.experimental))),
("#/abc|#def/", nil),
("#|abc/#def#", nil),
("#/abc\n/#", nil),
("#/abc\r/#", nil),
]
for (input, expected) in testCases {
input.withCString {
let endPtr = $0 + input.utf8.count
assert(endPtr.pointee == 0)
guard let out = try? lexRegex(
start: $0, end: endPtr, delimiters: Delimiter.allDelimiters)
else {
XCTAssertNil(expected)
return
}
XCTAssertEqual(expected?.0, out.0)
XCTAssertEqual(expected?.1, out.1)
let droppedDelimiters = droppingRegexDelimiters(input)
XCTAssertEqual(expected?.0, droppedDelimiters.0)
XCTAssertEqual(expected?.1, droppedDelimiters.1)
}
}
// TODO: Remove the lexing code for these if we no longer need them.
let disabledDelimiters: [String] = [
"#|x|#", "re'x'", "rx'y'"
]
for input in disabledDelimiters {
try input.withCString {
let endPtr = $0 + input.utf8.count
assert(endPtr.pointee == 0)
do {
_ = try lexRegex(start: $0, end: endPtr)
XCTFail()
} catch let e as DelimiterLexError {
XCTAssertEqual(e.kind, .unknownDelimiter)
}
}
}
}
}
|
