Mihaela Mihaljevic
83e6e27d12
Group @testable imports at the bottom, per public/rules-swift's swiftformat. A behavior-preserving import-ordering reformat across 252 files (mostly tests). --trailingclosures was deliberately not adopted (cosmetic, and swiftformat flags it as caution-worthy).
154 lines
7.8 KiB
Swift
154 lines
7.8 KiB
Swift
import Testing
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@testable import PureXML
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/// The DTD-subset strictness landed with the OASIS/NIST conformance pass:
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/// unknown or malformed markup declarations, the exact `%name;` parameter-
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/// reference grammar, strict declaration names, NDATA rules, notation tails,
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/// conditional-section keywords and balance, external-subset error
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/// propagation with text declarations, and PI target separation.
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@Suite("DTD subset strictness")
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struct DTDSubsetStrictnessTests {
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private func limits() -> PureXML.Parsing.Limits {
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PureXML.Parsing.Limits(allowDoctype: true)
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}
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private func parses(_ xml: String) -> Bool {
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(try? PureXML.parse(xml, limits: limits())) != nil
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}
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private func parses(_ xml: String, externalSubset: String) -> Bool {
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let resolver = PureXML.Parsing.EntityResolver(
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resolveEntity: { _, _ in nil },
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resolveExternalSubset: { _ in externalSubset },
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)
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return (try? PureXML.parse(xml, limits: limits(), resolver: resolver)) != nil
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}
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private let externalHost = "<!DOCTYPE doc SYSTEM \"sub.dtd\">\n<doc/>"
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@Test("Unknown, lowercase, or space-separated declaration keywords are rejected")
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func test_declarationKeywords() {
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><!DUNNO junk>]>\n<doc/>"))
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#expect(!parses("<!DOCTYPE doc [<!element doc EMPTY>]>\n<doc/>"))
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#expect(!parses("<!DOCTYPE doc [<! ENTITY ge \"v\">]>\n<doc/>"))
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#expect(parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY>]>\n<doc/>"))
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}
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@Test("A parameter-entity reference is '%' Name ';' exactly")
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func test_parameterReferenceGrammar() {
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let declare = "<!ELEMENT doc EMPTY><!ENTITY % pe \"<!---->\">"
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#expect(!parses("<!DOCTYPE doc [\(declare)%pe<!---->]>\n<doc/>"))
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#expect(!parses("<!DOCTYPE doc [\(declare)% pe;]>\n<doc/>"))
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#expect(!parses("<!DOCTYPE doc [\(declare)%pe ;]>\n<doc/>"))
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#expect(parses("<!DOCTYPE doc [\(declare)%pe;]>\n<doc/>"))
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}
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@Test("Entity and parameter-entity names must start with a name-start character")
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func test_strictEntityNames() {
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><!ENTITY -ge \"v\">]>\n<doc/>"))
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><!ENTITY % .pe \"v\">]>\n<doc/>"))
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#expect(parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><!ENTITY ge \"v\">]>\n<doc/>"))
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}
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@Test("NDATA requires whitespace and a strict notation name")
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func test_ndataNames() {
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let notation = "<!NOTATION n SYSTEM \"x\">"
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY>\(notation)<!ENTITY ge SYSTEM \"e\" NDATA>]>\n<doc/>"))
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY>\(notation)<!ENTITY ge SYSTEM \"e\" NDATA -n>]>\n<doc/>"))
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#expect(parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY>\(notation)<!ENTITY ge SYSTEM \"e\" NDATA n>]>\n<doc/>"))
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}
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@Test("A notation declaration requires its identifier and a clean tail")
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func test_notationTail() {
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><!NOTATION n SYSTEM \"\"\">]>\n<doc/>"))
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><!NOTATION n>]>\n<doc/>"))
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#expect(parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><!NOTATION n PUBLIC \"p\">]>\n<doc/>"))
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}
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@Test("An entity value literal admits no bare '%' or '&'")
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func test_entityLiteralReferences() {
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#expect(!parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><!ENTITY % e \"asdf%\">"))
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#expect(!parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><!ENTITY % e \"asdf&\">"))
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#expect(parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><!ENTITY % e \"a%pe;b\">"))
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}
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@Test("Conditional-section keywords are case-sensitive INCLUDE or IGNORE and must balance")
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func test_conditionalSections() {
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#expect(!parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><![TEMP[<!ATTLIST doc a CDATA #IMPLIED>]]>"))
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#expect(!parses(externalHost, externalSubset: "<![include[<!ELEMENT doc EMPTY>]]>"))
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#expect(!parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><![ignore[]]>"))
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#expect(!parses(externalHost, externalSubset: "<![INCLUDE[<!ELEMENT doc EMPTY>] ]>"))
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#expect(!parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><![IGNORE[<![]]>"))
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#expect(!parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><![IGNORE[ x ]]>]]>"))
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#expect(parses(externalHost, externalSubset: "<![INCLUDE[<!ELEMENT doc EMPTY>]]>"))
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#expect(parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY><![IGNORE[ <![ x ]]> ]]>"))
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}
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@Test("External-subset grammar violations reject the document")
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func test_externalSubsetPropagates() {
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#expect(!parses(externalHost, externalSubset: "<!DOCTYPE doc [<!ELEMENT doc EMPTY>]>"))
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#expect(parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY>"))
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}
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@Test("A text declaration allows version and requires encoding, never standalone")
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func test_textDeclaration() {
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#expect(parses(externalHost, externalSubset: "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<!ELEMENT doc EMPTY>"))
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#expect(parses(externalHost, externalSubset: "<?xml encoding=\"UTF-8\"?>\n<!ELEMENT doc EMPTY>"))
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#expect(!parses(externalHost, externalSubset: "<?xml version=\"1.0\" encoding=\"UTF-8\" standalone=\"yes\"?>\n<!ELEMENT doc EMPTY>"))
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#expect(!parses(externalHost, externalSubset: "<?xml version=\"1.0\"?>\n<!ELEMENT doc EMPTY>"))
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}
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@Test("A processing-instruction target must be separated from its data")
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func test_processingInstructionSeparation() {
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#expect(!parses("<?pitarget+++?>\n<doc/>"))
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#expect(parses("<?pitarget +++?>\n<doc/>"))
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#expect(parses("<?pitarget?>\n<doc/>"))
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}
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@Test("The internal subset admits only declarations, PE references, and whitespace")
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func test_subsetJunk() {
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY> junk ]>\n<doc/>"))
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#expect(!parses(externalHost, externalSubset: "<!ELEMENT doc EMPTY> ]]>"))
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}
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@Test("A PI target inside the subset must be separated from its data")
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func test_subsetPISeparation() {
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#expect(!parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><?bad-pi+?>]>\n<doc/>"))
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#expect(parses("<!DOCTYPE doc [<!ELEMENT doc EMPTY><?good-pi data?>]>\n<doc/>"))
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}
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@Test("Character references in a PE literal are expanded at declaration (Appendix D)")
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func test_parameterEntityCharacterReferences() {
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// The spec's tricky example: %xx; expands to %zz; which declares tricky.
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let xml = """
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<!DOCTYPE test [
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<!ELEMENT test (#PCDATA) >
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<!ENTITY % xx '%zz;'>
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<!ENTITY % zz '<!ENTITY tricky "error-prone" >' >
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%xx;
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]>
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<test>This sample shows a &tricky; method.</test>
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"""
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let node = try? PureXML.parse(xml, limits: limits())
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#expect(node != nil)
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}
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@Test("An external entity's text declaration is not part of its replacement")
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func test_externalEntityTextDeclaration() {
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let xml = "<!DOCTYPE root [<!ELEMENT root ANY><!ENTITY outside SYSTEM \"o.ent\">]>\n<root>&outside;</root>"
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let resolver = PureXML.Parsing.EntityResolver(
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resolveEntity: { _, _ in "<?xml encoding=\"UTF-8\"?>ok" },
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resolveExternalSubset: { _ in nil },
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)
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let node = try? PureXML.parse(xml, limits: limits(), resolver: resolver)
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#expect(node != nil)
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// The declaration must be stripped, not included as text.
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guard let node, case let .document(children) = node,
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case let .element(root)? = children.first(where: { $0.element != nil })
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else { return }
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#expect(root.children.allSatisfy { child in
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if case let .text(value) = child { value == "ok" } else { false }
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})
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}
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}
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