Mihaela Mihaljevic
d1ae56acbd
Add the string functions (concat, starts-with, contains, substring-before, substring-after, substring, string-length, normalize-space, translate), the number functions (sum, floor, ceiling, round), and the node functions (local-name, name, namespace-uri, id, lang), merged into the evaluation library. All pure Swift, no Foundation: substring search is hand-rolled. Without a DTD, id() matches an attribute named id or xml:id. Closes #41
97 lines
3.4 KiB
Swift
97 lines
3.4 KiB
Swift
@testable import PureXML
|
|
import Testing
|
|
|
|
@Suite("XPath functions")
|
|
struct XPathFunctionTests {
|
|
private func doc() throws -> PureXML.Model.Node {
|
|
try PureXML.parse(
|
|
"<doc xml:lang=\"en\">"
|
|
+ "<item id=\"a\"> hello world </item>"
|
|
+ "<item id=\"b\">12</item>"
|
|
+ "<item id=\"c\">8</item>"
|
|
+ "<ns:tag xmlns:ns=\"urn:x\">x</ns:tag>"
|
|
+ "</doc>",
|
|
)
|
|
}
|
|
|
|
private func string(_ path: String) throws -> String {
|
|
try PureXML.XPath.Query(path).string(over: doc())
|
|
}
|
|
|
|
private func number(_ path: String) throws -> Double {
|
|
try PureXML.XPath.Query(path).number(over: doc())
|
|
}
|
|
|
|
private func boolean(_ path: String) throws -> Bool {
|
|
try PureXML.XPath.Query(path).boolean(over: doc())
|
|
}
|
|
|
|
// MARK: String functions
|
|
|
|
@Test("concat, starts-with, contains")
|
|
func test_stringPredicates() throws {
|
|
#expect(try string("concat('a', 'b', 'c')") == "abc")
|
|
#expect(try boolean("starts-with('hello', 'he')"))
|
|
#expect(try boolean("contains('hello', 'ell')"))
|
|
#expect(try !boolean("contains('hello', 'z')"))
|
|
}
|
|
|
|
@Test("substring-before and substring-after")
|
|
func test_substringAround() throws {
|
|
#expect(try string("substring-before('1999/04', '/')") == "1999")
|
|
#expect(try string("substring-after('1999/04', '/')") == "04")
|
|
}
|
|
|
|
@Test("substring honors one-based positions and length")
|
|
func test_substring() throws {
|
|
#expect(try string("substring('hello', 2)") == "ello")
|
|
#expect(try string("substring('hello', 2, 3)") == "ell")
|
|
#expect(try string("substring('hello', 0, 3)") == "he")
|
|
}
|
|
|
|
@Test("string-length and normalize-space")
|
|
func test_lengthAndNormalize() throws {
|
|
#expect(try number("string-length('hello')") == 5)
|
|
#expect(try string("normalize-space(//item[@id='a'])") == "hello world")
|
|
}
|
|
|
|
@Test("translate maps and deletes characters")
|
|
func test_translate() throws {
|
|
#expect(try string("translate('bar', 'abc', 'ABC')") == "BAr")
|
|
#expect(try string("translate('--aaa--', 'abc-', 'ABC')") == "AAA")
|
|
}
|
|
|
|
// MARK: Number functions
|
|
|
|
@Test("sum, floor, ceiling, round")
|
|
func test_numberFunctions() throws {
|
|
#expect(try number("sum(//item[@id='b' or @id='c'])") == 20)
|
|
#expect(try number("floor(2.7)") == 2)
|
|
#expect(try number("ceiling(2.1)") == 3)
|
|
#expect(try number("round(2.5)") == 3)
|
|
#expect(try number("round(-2.5)") == -2)
|
|
}
|
|
|
|
// MARK: Node functions
|
|
|
|
@Test("local-name, name, namespace-uri")
|
|
func test_nodeNaming() throws {
|
|
#expect(try string("local-name(//ns:tag)") == "tag")
|
|
#expect(try string("name(//ns:tag)") == "ns:tag")
|
|
#expect(try string("namespace-uri(//ns:tag)") == "urn:x")
|
|
}
|
|
|
|
@Test("id selects elements by their id attribute")
|
|
func test_id() throws {
|
|
#expect(try PureXML.XPath.Query("id('b')").strings(over: doc()) == ["12"])
|
|
#expect(try PureXML.XPath.Query("id('a c')").evaluate(over: doc()).count == 2)
|
|
}
|
|
|
|
@Test("lang tests the inherited xml:lang")
|
|
func test_lang() throws {
|
|
// lang() reads the context node, so it is exercised inside a predicate.
|
|
#expect(try PureXML.XPath.Query("//item[lang('en')]").evaluate(over: doc()).count == 3)
|
|
#expect(try PureXML.XPath.Query("//item[lang('fr')]").evaluate(over: doc()).isEmpty)
|
|
}
|
|
}
|