Mihaela Mihaljevic
c82fef085e
Add PureXML.Parsing.XMLCharacter as the single source of truth for character classes, implementing the exact XML 1.0 (Fifth Edition) Char, NameStartChar, and NameChar productions as public scalar predicates, plus isValidName. The scanner's name recognition now delegates to these exact ranges (replacing a loose isLetter check) and handles precomposed and combining-mark names. Closes #35. Reimplemented from the XML grammar; no upstream code copied. 4 tests; 98 total.
52 lines
2.2 KiB
Swift
52 lines
2.2 KiB
Swift
@testable import PureXML
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import Testing
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@Suite("XML characters")
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struct XMLCharacterTests {
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private func scalar(_ value: UInt32) -> Unicode.Scalar {
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Unicode.Scalar(value) ?? " "
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}
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@Test("isChar follows the Char production")
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func test_isChar() {
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#expect(PureXML.Parsing.XMLCharacter.isChar(scalar(0x09))) // tab
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#expect(PureXML.Parsing.XMLCharacter.isChar(scalar(0x41))) // A
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#expect(!PureXML.Parsing.XMLCharacter.isChar(scalar(0x01))) // control
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#expect(!PureXML.Parsing.XMLCharacter.isChar(scalar(0xFFFE))) // non-character
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}
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@Test("Name start excludes name-only characters; name char includes them")
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func test_nameClasses() {
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let kind = PureXML.Parsing.XMLCharacter.self
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#expect(kind.isNameStart(scalar(0x03B1))) // Greek alpha
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#expect(!kind.isNameStart(scalar(0x30))) // digit
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#expect(!kind.isNameStart(scalar(0x0301))) // combining acute
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#expect(!kind.isNameStart(scalar(0x00AA))) // ordinal: a letter, but outside NameStartChar
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#expect(kind.isNameChar(scalar(0x30))) // digit
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#expect(kind.isNameChar(scalar(0x0301))) // combining acute
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#expect(kind.isNameChar(scalar(0xB7))) // middle dot
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#expect(!kind.isNameChar(scalar(0x20))) // space
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}
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@Test("isValidName accepts well-formed names and rejects the rest")
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func test_isValidName() {
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for name in ["foo", "foo-bar", "ns:local", "_x1", "\u{00E9}l", "\u{03B1}\u{0301}"] {
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#expect(PureXML.Parsing.XMLCharacter.isValidName(name), "\(name)")
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}
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for name in ["", "1abc", "-x", ".x", "a b", "a\u{0001}b"] {
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#expect(!PureXML.Parsing.XMLCharacter.isValidName(name), "\(name)")
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}
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}
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@Test("The parser accepts a non-ASCII element name")
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func test_unicodeElementName() throws {
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let node = try PureXML.parse("<\u{03B1}>x</\u{03B1}>")
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guard case let .document(children) = node, case let .element(element) = children.first else {
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Issue.record("expected a document with a root element")
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return
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}
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#expect(element.name.localName == "\u{03B1}")
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#expect(element.text == "x")
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}
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}
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