Mihaela Mihaljevic
fe19b0b1ea
Validate XSD identity constraints over the instance document in a pass that walks the tree alongside type validation: - xs:unique requires the selected nodes' field tuples to be distinct, excluding any node that is missing a field. - xs:key additionally requires every field to be present. - xs:keyref requires each tuple to equal a tuple of the named key or unique visible in an enclosing scope, resolved through a stack of scope frames so a keyref and the key it refers to may sit on the same element. The selector and field XPaths run on the existing XPath engine, relative to the declaring element and each selected node. Constraints are gathered for every element declaration at any depth, keyed by element name. Closes #67
82 lines
3.1 KiB
Swift
82 lines
3.1 KiB
Swift
@testable import PureXML
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import Testing
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@Suite("XSD identity constraints")
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struct XSDIdentityTests {
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private func validate(_ xsd: String, _ xml: String) throws -> [PureXML.Validation.Issue] {
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try PureXML.Schema.Document(xsd).validate(xml)
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}
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private let head = "<xs:schema xmlns:xs=\"http://www.w3.org/2001/XMLSchema\">"
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@Test("xs:unique rejects a duplicated field value")
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func test_unique() throws {
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let xsd = """
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\(head)
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<xs:element name="list">
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<xs:complexType>
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<xs:sequence><xs:element name="item" type="xs:string" maxOccurs="unbounded"/></xs:sequence>
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</xs:complexType>
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<xs:unique name="byId">
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<xs:selector xpath="item"/>
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<xs:field xpath="@id"/>
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</xs:unique>
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</xs:element>
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</xs:schema>
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"""
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#expect(try validate(xsd, "<list><item id=\"1\"/><item id=\"2\"/></list>").isEmpty)
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#expect(try !validate(xsd, "<list><item id=\"1\"/><item id=\"1\"/></list>").isEmpty)
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// unique tolerates a missing field
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#expect(try validate(xsd, "<list><item/><item/></list>").isEmpty)
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}
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@Test("xs:key requires every field to be present and distinct")
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func test_key() throws {
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let xsd = """
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\(head)
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<xs:element name="list">
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<xs:complexType>
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<xs:sequence><xs:element name="item" type="xs:string" maxOccurs="unbounded"/></xs:sequence>
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</xs:complexType>
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<xs:key name="itemKey">
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<xs:selector xpath="item"/>
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<xs:field xpath="@id"/>
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</xs:key>
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</xs:element>
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</xs:schema>
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"""
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#expect(try validate(xsd, "<list><item id=\"1\"/><item id=\"2\"/></list>").isEmpty)
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#expect(try !validate(xsd, "<list><item id=\"1\"/><item id=\"1\"/></list>").isEmpty)
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// a key field may not be absent
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#expect(try !validate(xsd, "<list><item id=\"1\"/><item/></list>").isEmpty)
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}
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@Test("xs:keyref requires a matching key value")
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func test_keyref() throws {
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let xsd = """
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\(head)
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<xs:element name="orders">
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<xs:complexType>
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<xs:sequence>
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<xs:element name="product" type="xs:string" maxOccurs="unbounded"/>
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<xs:element name="line" type="xs:string" maxOccurs="unbounded"/>
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</xs:sequence>
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</xs:complexType>
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<xs:key name="prodKey">
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<xs:selector xpath="product"/>
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<xs:field xpath="@code"/>
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</xs:key>
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<xs:keyref name="lineRef" refer="prodKey">
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<xs:selector xpath="line"/>
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<xs:field xpath="@product"/>
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</xs:keyref>
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</xs:element>
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</xs:schema>
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"""
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let valid = "<orders><product code=\"A\"/><product code=\"B\"/><line product=\"A\"/></orders>"
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let dangling = "<orders><product code=\"A\"/><line product=\"Z\"/></orders>"
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#expect(try validate(xsd, valid).isEmpty)
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#expect(try !validate(xsd, dangling).isEmpty)
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}
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}
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