Mihaela Mihaljevic
dd10f32abb
Per XSD 1.0 Datatypes a simpleType's content is (annotation?, (restriction | list | union)). The membership table admitted each name without the cardinality, so an empty simpleType or one combining two derivations (two unions, a union and a list, two restrictions) was accepted. The exactly-one rule is now enforced, mirroring the named-group compositor check. XSTS: invalid schemas accepted 537 to 527, valid schemas rejected held at 72, instance buckets unchanged.
303 lines
15 KiB
Swift
303 lines
15 KiB
Swift
@testable import PureXML
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import Testing
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/// Structural validity of a schema document against the schema-for-schemas
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/// content model (XSD 1.0 Structures): each component's children must be
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/// admitted by the model, an `annotation` (where allowed once) must be first,
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/// and an identity constraint needs a selector and field. Such a schema is
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/// invalid and must be rejected at compile time; the children were previously
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/// unchecked and the schema accepted (XSTS invalid-schema ctB/ctG/ctH, etc.).
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@Suite("Schema structural validity")
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struct SchemaStructureTests {
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private func compile(_ body: String) throws {
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_ = try PureXML.Schema.Document("""
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<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
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\(body)
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</xs:schema>
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""")
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}
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private func rejects(_ body: String) -> Bool {
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do { try compile(body)
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return false
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} catch { return true }
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}
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@Test("well-formed components compile")
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func test_valid() throws {
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try compile(#"""
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<xs:complexType name="t">
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<xs:annotation><xs:documentation>doc</xs:documentation></xs:annotation>
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<xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence>
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<xs:attribute name="x" type="xs:string"/>
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</xs:complexType>
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"""#)
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try compile(#"""
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<xs:element name="root">
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<xs:complexType><xs:sequence><xs:element ref="a"/></xs:sequence></xs:complexType>
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<xs:key name="k"><xs:selector xpath="a"/><xs:field xpath="@id"/></xs:key>
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</xs:element>
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<xs:element name="a"><xs:complexType><xs:attribute name="id" type="xs:string"/></xs:complexType></xs:element>
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"""#)
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}
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@Test("a child not admitted by the content model is rejected")
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func test_disallowedChild() {
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// element is not a direct child of complexType (it must sit in a group).
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#expect(rejects(#"<xs:complexType name="t"><xs:element name="a" type="xs:string"/></xs:complexType>"#))
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// attribute admits only annotation and simpleType, not sequence.
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#expect(rejects(#"<xs:attribute name="a"><xs:sequence/></xs:attribute>"#))
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}
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@Test("at most one annotation, and it must be first")
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func test_annotationPlacement() {
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#expect(rejects(#"""
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<xs:complexType name="t">
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<xs:annotation><xs:documentation>one</xs:documentation></xs:annotation>
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<xs:annotation><xs:documentation>two</xs:documentation></xs:annotation>
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</xs:complexType>
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"""#))
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#expect(rejects(#"""
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<xs:complexType name="t">
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<xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence>
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<xs:annotation><xs:documentation>late</xs:documentation></xs:annotation>
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</xs:complexType>
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"""#))
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}
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@Test("schema and redefine may carry several annotations")
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func test_multipleAnnotationOnSchema() throws {
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try compile(#"""
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<xs:annotation><xs:documentation>one</xs:documentation></xs:annotation>
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<xs:element name="a" type="xs:string"/>
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<xs:annotation><xs:documentation>two</xs:documentation></xs:annotation>
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"""#)
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}
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@Test("enumerated attributes accept only their value space")
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func test_enumeratedAttributeValues() {
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#expect(rejects(#"<xs:attribute name="a" type="xs:string" use="foo"/>"#))
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#expect(rejects(#"<xs:attribute name="a" type="xs:string" use=""/>"#))
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#expect(rejects(#"<xs:complexType name="t" mixed="yes"><xs:sequence/></xs:complexType>"#))
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#expect(rejects(#"<xs:complexType name="t" abstract="maybe"><xs:sequence/></xs:complexType>"#))
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#expect(rejects(#"<xs:element name="a" type="xs:string" form="Qualified"/>"#))
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}
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@Test("minOccurs and maxOccurs must be nonNegativeInteger (maxOccurs also unbounded)")
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func test_occursValues() throws {
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try compile(#"<xs:complexType name="t"><xs:sequence><xs:element name="a" type="xs:string" minOccurs="0" maxOccurs="unbounded"/></xs:sequence></xs:complexType>"#)
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#expect(rejects(#"<xs:complexType name="t"><xs:sequence><xs:element name="a" type="xs:string" minOccurs="-1"/></xs:sequence></xs:complexType>"#))
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#expect(rejects(#"<xs:complexType name="t"><xs:sequence><xs:element name="a" type="xs:string" maxOccurs="lots"/></xs:sequence></xs:complexType>"#))
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#expect(rejects(#"<xs:complexType name="t"><xs:sequence><xs:element name="a" type="xs:string" minOccurs="x"/></xs:sequence></xs:complexType>"#))
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}
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@Test("a particle's minOccurs may not exceed its maxOccurs")
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func test_occurrenceOrder() throws {
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func wrap(_ particle: String) -> String {
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"<xs:complexType name=\"t\"><xs:sequence>\(particle)</xs:sequence></xs:complexType>"
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}
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#expect(rejects(wrap(#"<xs:element name="a" type="xs:string" minOccurs="5" maxOccurs="2"/>"#)))
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#expect(rejects(wrap(#"<xs:element name="a" type="xs:string" minOccurs="3" maxOccurs="0"/>"#)))
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// Equal bounds, and unbounded, are fine.
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try compile(wrap(#"<xs:element name="a" type="xs:string" minOccurs="2" maxOccurs="2"/>"#))
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try compile(wrap(#"<xs:element name="a" type="xs:string" minOccurs="2" maxOccurs="unbounded"/>"#))
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try compile(wrap(#"<xs:element name="a" type="xs:string" minOccurs="0" maxOccurs="0"/>"#))
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}
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@Test("valid enumerated and occurrence attribute values compile")
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func test_validAttributeValues() throws {
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try compile(#"<xs:attribute name="a" type="xs:string" use="required"/>"#)
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try compile(#"<xs:complexType name="t" mixed="true"><xs:sequence/></xs:complexType>"#)
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try compile(#"<xs:complexType name="t" abstract="false"><xs:sequence/></xs:complexType>"#)
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}
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@Test("a component name must be a valid NCName")
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func test_nameNCName() {
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#expect(rejects(#"<xs:element name="" type="xs:string"/>"#))
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#expect(rejects(#"<xs:element name="123" type="xs:string"/>"#))
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#expect(rejects(#"<xs:complexType name="a:b"><xs:sequence/></xs:complexType>"#))
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#expect(rejects(#"<xs:attribute name="a b" type="xs:string"/>"#))
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try? compile(#"<xs:element name="_ok-1.2" type="xs:string"/>"#)
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}
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@Test("a QName-valued reference attribute must be a lexical QName")
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func test_qnameReferences() throws {
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#expect(rejects(#"<xs:element name="a" type=":_"/>"#))
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#expect(rejects(#"<xs:element name="a" type="a:b:c"/>"#))
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try compile(#"<xs:element name="a" type="xs:string"/>"#)
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try compile(#"<xs:complexType name="t"><xs:sequence><xs:element ref="g"/></xs:sequence></xs:complexType><xs:element name="g" type="xs:string"/>"#)
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}
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@Test("a complexType's content shape is exclusive")
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func test_complexTypeContentExclusivity() {
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// simpleContent/complexContent are mutually exclusive and exclude a model
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// group or a direct attribute; only one model group is allowed.
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#expect(rejects(#"""
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<xs:complexType name="t">
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<xs:simpleContent><xs:extension base="xs:string"/></xs:simpleContent>
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<xs:simpleContent><xs:extension base="xs:string"/></xs:simpleContent>
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</xs:complexType>
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"""#))
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#expect(rejects(#"""
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<xs:complexType name="t">
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<xs:simpleContent><xs:extension base="xs:string"/></xs:simpleContent>
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<xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence>
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</xs:complexType>
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"""#))
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#expect(rejects(#"""
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<xs:complexType name="t">
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<xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence>
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<xs:choice><xs:element name="b" type="xs:string"/></xs:choice>
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</xs:complexType>
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"""#))
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}
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@Test("valid complexType content shapes compile")
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func test_complexTypeContentValid() throws {
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try compile(#"""
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<xs:complexType name="t">
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<xs:simpleContent><xs:extension base="xs:string"><xs:attribute name="a" type="xs:string"/></xs:extension></xs:simpleContent>
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</xs:complexType>
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"""#)
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try compile(#"<xs:complexType name="t"><xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence><xs:attribute name="x" type="xs:string"/></xs:complexType>"#)
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try compile(#"<xs:complexType name="t"><xs:attribute name="x" type="xs:string"/></xs:complexType>"#)
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}
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@Test("a named group must contain exactly one model group")
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func test_namedGroupContent() throws {
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try compile(#"<xs:group name="g"><xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence></xs:group>"#)
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// Two compositors, or none, is invalid.
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#expect(rejects(#"""
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<xs:group name="g">
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<xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence>
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<xs:all><xs:element name="b" type="xs:string"/></xs:all>
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</xs:group>
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"""#))
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#expect(rejects(#"<xs:group name="g"><xs:annotation><xs:documentation>x</xs:documentation></xs:annotation></xs:group>"#))
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// A group reference (no name) is not a definition and is not flagged here.
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try compile(
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#"<xs:group name="g"><xs:sequence><xs:element name="a" type="xs:string"/></xs:sequence></xs:group><xs:complexType name="t"><xs:group ref="g"/></xs:complexType>"#,
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)
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}
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@Test("an attribute not admitted by a component is rejected")
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func test_attributeApplicability() {
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#expect(rejects(#"<xs:element name="a" type="xs:string" nullable="true"/>"#)) // typo for nillable
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#expect(rejects(#"<xs:complexType name="t" foo="bar"><xs:sequence/></xs:complexType>"#))
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#expect(rejects(#"<xs:sequence name="x"/>"#)) // sequence has no name
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// A foreign-namespace attribute is allowed.
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try? compile(#"<xs:element name="a" type="xs:string" xmlns:x="urn:x" x:note="hi"/>"#)
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}
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@Test("ref excludes name and type")
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func test_refExclusions() {
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#expect(rejects(#"<xs:complexType name="t"><xs:sequence><xs:element ref="g" name="h"/></xs:sequence></xs:complexType><xs:element name="g" type="xs:string"/>"#))
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#expect(rejects(#"<xs:complexType name="t"><xs:sequence><xs:element ref="g" type="xs:string"/></xs:sequence></xs:complexType><xs:element name="g" type="xs:string"/>"#))
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}
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@Test("element declarations in one content model must be consistent")
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func test_elementDeclsConsistent() throws {
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// Same name, different type in one content model is invalid.
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#expect(rejects(#"""
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<xs:complexType name="t"><xs:sequence>
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<xs:element name="a" type="xs:string"/>
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<xs:element name="a" type="xs:integer"/>
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</xs:sequence></xs:complexType>
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"""#))
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// Same name, same type is consistent (separated so it stays unambiguous).
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try compile(#"""
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<xs:complexType name="t"><xs:sequence>
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<xs:element name="a" type="xs:string"/>
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<xs:element name="b" type="xs:string"/>
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<xs:element name="a" type="xs:string"/>
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</xs:sequence></xs:complexType>
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"""#)
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// A same name in a NESTED complex type is a different content model: allowed.
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try compile(#"""
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<xs:complexType name="t"><xs:sequence>
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<xs:element name="a" type="xs:string"/>
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<xs:element name="b">
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<xs:complexType><xs:sequence><xs:element name="a" type="xs:integer"/></xs:sequence></xs:complexType>
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</xs:element>
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</xs:sequence></xs:complexType>
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"""#)
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}
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@Test("an identity constraint requires a selector and field")
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func test_identityConstraintRequiresParts() {
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#expect(rejects(#"""
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<xs:element name="root">
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<xs:complexType><xs:sequence><xs:element ref="a"/></xs:sequence></xs:complexType>
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<xs:key name="k"><xs:selector xpath="a"/></xs:key>
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</xs:element>
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<xs:element name="a"><xs:complexType><xs:attribute name="id" type="xs:string"/></xs:complexType></xs:element>
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"""#))
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}
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@Test("a complexContent derivation's content must be ordered: model group, attributes, anyAttribute")
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func test_complexContentDerivationOrder() {
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func derive(_ kind: String, _ body: String) -> String {
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#"""
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<xs:complexType name="b"><xs:sequence><xs:element name="e" type="xs:string"/></xs:sequence></xs:complexType>
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<xs:complexType name="t"><xs:complexContent><xs:\#(kind) base="b">\#(body)</xs:\#(kind)></xs:complexContent></xs:complexType>
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"""#
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}
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// Two model groups (ctG/ctH "X then Y").
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#expect(rejects(derive("restriction", #"<xs:sequence/><xs:sequence/>"#)))
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#expect(rejects(derive("extension", #"<xs:choice/><xs:all/>"#)))
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// A model group after an attribute.
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#expect(rejects(derive("restriction", #"<xs:attribute name="x"/><xs:sequence/>"#)))
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// An attribute after anyAttribute, and two anyAttributes.
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#expect(rejects(derive("extension", #"<xs:anyAttribute/><xs:attribute name="x"/>"#)))
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#expect(rejects(derive("restriction", #"<xs:sequence/><xs:anyAttribute/><xs:anyAttribute/>"#)))
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}
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@Test("a well-ordered complexContent derivation compiles")
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func test_complexContentDerivationValid() throws {
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try compile(#"""
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<xs:complexType name="b"><xs:sequence><xs:element name="e" type="xs:string"/></xs:sequence></xs:complexType>
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<xs:complexType name="t"><xs:complexContent>
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<xs:extension base="b">
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<xs:sequence><xs:element name="f" type="xs:string"/></xs:sequence>
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<xs:attribute name="x" type="xs:string"/>
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<xs:anyAttribute/>
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</xs:extension>
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</xs:complexContent></xs:complexType>
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"""#)
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// No model group is fine (an extension that only adds attributes).
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try compile(#"""
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<xs:complexType name="b"><xs:sequence><xs:element name="e" type="xs:string"/></xs:sequence></xs:complexType>
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<xs:complexType name="t"><xs:complexContent>
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<xs:extension base="b"><xs:attribute name="x" type="xs:string"/></xs:extension>
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</xs:complexContent></xs:complexType>
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"""#)
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}
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@Test("a complexType's shorthand content must be ordered: model group, attributes, anyAttribute")
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func test_complexTypeShorthandOrder() {
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// A model group after an attribute, two anyAttributes, an attribute after anyAttribute (ctB).
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#expect(rejects(#"<xs:complexType name="t"><xs:attribute name="x"/><xs:sequence/></xs:complexType>"#))
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#expect(rejects(#"<xs:complexType name="t"><xs:all/><xs:anyAttribute/><xs:anyAttribute/></xs:complexType>"#))
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#expect(rejects(#"<xs:complexType name="t"><xs:anyAttribute/><xs:attribute name="x"/></xs:complexType>"#))
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// A well-ordered shorthand complexType compiles.
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#expect(!rejects(#"""
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<xs:complexType name="t">
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<xs:sequence><xs:element name="e" type="xs:string"/></xs:sequence>
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<xs:attribute name="x" type="xs:string"/>
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<xs:anyAttribute/>
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</xs:complexType>
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"""#))
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}
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@Test("a simpleType must contain exactly one of restriction, list, or union")
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func test_simpleTypeContent() {
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// Two derivations, or a mix, is invalid (stB).
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#expect(rejects(#"<xs:simpleType name="t"><xs:list itemType="xs:int"/><xs:list itemType="xs:int"/></xs:simpleType>"#))
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#expect(rejects(#"<xs:simpleType name="t"><xs:union memberTypes="xs:int"/><xs:restriction base="xs:string"/></xs:simpleType>"#))
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#expect(rejects(#"<xs:simpleType name="t"></xs:simpleType>"#))
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// Exactly one compiles.
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#expect(!rejects(#"<xs:simpleType name="t"><xs:restriction base="xs:string"/></xs:simpleType>"#))
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#expect(!rejects(#"<xs:simpleType name="t"><xs:list itemType="xs:int"/></xs:simpleType>"#))
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}
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}
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