Mihaela Mihaljevic
12af2fbc24
XSLT 1.0 3.4: a whitespace-only text node in the stylesheet is preserved when the nearest ancestor-or-self with an xml:space attribute has value preserve. The body parser dropped every whitespace-only run unconditionally, so a literal result element with xml:space="preserve" lost its whitespace content. Consult the in-scope xml:space before stripping. Closes Apache Xalan conformance case whitespace20.
99 lines
4.4 KiB
Swift
99 lines
4.4 KiB
Swift
import Testing
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@testable import PureXML
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@Suite("XSLT strip-space / preserve-space")
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struct XSLTWhitespaceTests {
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private let xsl = "xmlns:xsl=\"http://www.w3.org/1999/XSL/Transform\""
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private func transform(_ stylesheet: String, _ source: String) throws -> String {
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try PureXML.XSLT.transform(stylesheet: stylesheet, source: source)
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}
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@Test("strip-space removes whitespace-only text nodes; a copy reflects it")
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func test_stripSpace() throws {
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let style = """
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<xsl:stylesheet version="1.0" \(xsl)>
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<xsl:strip-space elements="a"/>
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<xsl:output method="xml" omit-xml-declaration="yes"/>
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<xsl:template match="/"><xsl:copy-of select="a"/></xsl:template>
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</xsl:stylesheet>
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"""
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let source = "<a>\n <b/>\n <b/>\n</a>"
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// The indentation whitespace between <b/> elements is stripped.
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#expect(try transform(style, source) == "<a><b/><b/></a>")
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}
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@Test("Without strip-space the whitespace is preserved")
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func test_noStrip() throws {
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let style = """
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<xsl:stylesheet version="1.0" \(xsl)>
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<xsl:output method="xml" omit-xml-declaration="yes"/>
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<xsl:template match="/"><xsl:copy-of select="a"/></xsl:template>
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</xsl:stylesheet>
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"""
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let source = "<a>\n <b/>\n</a>"
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#expect(try transform(style, source).contains("\n "))
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}
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@Test("preserve-space overrides strip-space for a named element")
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func test_preserveOverrides() throws {
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let style = """
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<xsl:stylesheet version="1.0" \(xsl)>
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<xsl:strip-space elements="*"/>
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<xsl:preserve-space elements="keep"/>
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<xsl:output method="xml" omit-xml-declaration="yes"/>
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<xsl:template match="/"><xsl:copy-of select="*"/></xsl:template>
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</xsl:stylesheet>
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"""
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// strip-space="*" strips <drop>'s whitespace, but <keep> preserves its own.
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let stripped = try transform(style, "<drop>\n <x/>\n</drop>")
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#expect(stripped == "<drop><x/></drop>")
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let kept = try transform(style, "<keep>\n <x/>\n</keep>")
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#expect(kept.contains("\n "))
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}
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@Test("xml:space=preserve on a source element keeps its whitespace despite strip-space")
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func test_xmlSpacePreserve() throws {
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let style = """
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<xsl:stylesheet version="1.0" \(xsl)>
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<xsl:strip-space elements="a"/>
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<xsl:output method="xml" omit-xml-declaration="yes"/>
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<xsl:template match="/"><xsl:copy-of select="a"/></xsl:template>
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</xsl:stylesheet>
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"""
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let source = "<a xml:space=\"preserve\">\n <b/>\n</a>"
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#expect(try transform(style, source).contains("\n "))
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}
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@Test("strip-space matches a namespace wildcard by namespace, not prefix")
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func test_namespaceWildcard() throws {
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// strip-space `p:*` strips elements in p's namespace. The source binds the
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// same namespace to a different prefix (q), which must still match, while
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// an element in another namespace is preserved (Apache Xalan whitespace06,
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// whitespace07).
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let style = """
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<xsl:stylesheet version="1.0" \(xsl) xmlns:p="urn:n1" xmlns:s="urn:n2" exclude-result-prefixes="p s">
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<xsl:output omit-xml-declaration="yes"/>
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<xsl:strip-space elements="p:*"/>
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<xsl:template match="/"><out><xsl:value-of select="string-length(doc/p:a)"/>,<xsl:value-of select="string-length(doc/s:b)"/></out></xsl:template>
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</xsl:stylesheet>
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"""
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let source = "<doc xmlns:q=\"urn:n1\" xmlns:r=\"urn:n2\"><q:a> </q:a><r:b> </r:b></doc>"
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#expect(try transform(style, source) == "<out>0,2</out>")
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}
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@Test("xml:space=preserve in the stylesheet keeps a literal element's whitespace (3.4)")
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func test_xmlSpacePreserveInStylesheet() throws {
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// A literal result element with xml:space="preserve" keeps its
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// whitespace-only content; xml:space="default" strips it, as does no
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// xml:space at all (Apache Xalan whitespace20).
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let style = """
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<xsl:stylesheet version="1.0" \(xsl)>
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<xsl:output omit-xml-declaration="yes"/>
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<xsl:template match="/"><r><a xml:space="preserve"> </a><b xml:space="default"> </b><c> </c></r></xsl:template>
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</xsl:stylesheet>
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"""
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#expect(try transform(style, "<x/>") == "<r><a xml:space=\"preserve\"> </a><b xml:space=\"default\"/><c/></r>")
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}
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}
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