Mihaela Mihaljevic
537b455ce8
Complete the structural DTD validation layer. AttributeType now distinguishes the ID family; the validator does a second pass after the structural walk (since an IDREF may point forward to an ID later in the document): - ID-typed attribute values must be unique across the document. - IDREF values must each resolve to a declared ID. - IDREFS values are split on whitespace and each token must resolve. Reimplemented from the DTD ID/IDREF spec; no upstream code copied. 4 tests; 79 total.
37 lines
1.5 KiB
Swift
37 lines
1.5 KiB
Swift
@testable import PureXML
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import Testing
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@Suite("DTD ID and IDREF validation")
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struct DTDIdentifierTests {
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private func issues(_ xml: String) throws -> [PureXML.Validation.Issue] {
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try PureXML.validateAgainstInternalDTD(xml)
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}
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private let idDTD = "<!DOCTYPE root [<!ELEMENT root (item)*><!ELEMENT item EMPTY>"
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+ "<!ATTLIST item id ID #IMPLIED ref IDREF #IMPLIED refs IDREFS #IMPLIED>]>"
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@Test("Unique IDs validate; duplicate IDs are rejected")
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func test_idUniqueness() throws {
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try #expect(issues("\(idDTD)<root><item id=\"a\"/><item id=\"b\"/></root>").isEmpty)
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try #expect(!issues("\(idDTD)<root><item id=\"a\"/><item id=\"a\"/></root>").isEmpty)
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}
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@Test("IDREF resolves to an ID anywhere in the document, including forward")
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func test_idrefForwardReference() throws {
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try #expect(issues("\(idDTD)<root><item ref=\"b\"/><item id=\"b\"/></root>").isEmpty)
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}
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@Test("A dangling IDREF is rejected")
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func test_danglingIdref() throws {
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try #expect(!issues("\(idDTD)<root><item ref=\"x\"/><item id=\"b\"/></root>").isEmpty)
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}
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@Test("IDREFS resolves each token; a dangling token is rejected")
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func test_idrefs() throws {
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let valid = "\(idDTD)<root><item id=\"a\"/><item id=\"b\"/><item refs=\"a b\"/></root>"
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try #expect(issues(valid).isEmpty)
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let dangling = "\(idDTD)<root><item id=\"a\"/><item refs=\"a z\"/></root>"
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try #expect(!issues(dangling).isEmpty)
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}
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}
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