Mihaela Mihaljevic
6eddb64dcd
The scanner now errors with "found character that cannot start any token" when a tab leads a token in block context, matching libyaml's final guard in fetch_next_token (a plain scalar may not begin with a blank). Adds a differential harness (env-gated) that dumps the ported pipeline's yeast events for the whole suite. Verified against the libyaml reference dumper across all 308 vendored valid cases: the port is byte-for-byte identical to libyaml on 307, and the single difference (L24T/01) is the port matching the canonical test.event where libyaml drops a trailing line break. 333 tests.
67 lines
2.6 KiB
Swift
67 lines
2.6 KiB
Swift
import Foundation
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@testable import PureYAML
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import Testing
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/// Differential measurement of the ported libyaml scanner+parser against the full
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/// vendored YAML test suite, using the same yeast serializer as the canonical
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/// gate. Gated by an environment flag so it only runs when measuring; it prints a
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/// score and the failing ids split into throws vs wrong-stream.
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@Suite("LibYAML Port Conformance")
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struct LibYAMLPortConformanceTests {
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@Test("measure the ported pipeline against the suite")
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func test_measure() throws {
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guard ProcessInfo.processInfo.environment["PUREYAML_PORT_MEASURE"] == "1" else { return }
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var pass = 0
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var throwing: [String] = []
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var wrong: [String] = []
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let cases = CanonicalEventCorpus.validCases()
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for testCase in cases {
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guard let yaml = testCase.input, let expected = testCase.expectedEvents else { continue }
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do {
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var parser = try PureYAML.Parsing.LibYAML.Parser(yaml)
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let actual = try parser.parse().map(CanonicalEventCorpus.serialize).joined(separator: "\n")
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if actual == expected.trimmedTrailing {
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pass += 1
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} else {
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wrong.append(testCase.id)
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}
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} catch {
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throwing.append(testCase.id)
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}
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}
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print("PORT-SCORE pass=\(pass) wrong=\(wrong.count) throws=\(throwing.count) total=\(cases.count)")
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print("PORT-WRONG \(wrong.sorted().joined(separator: " "))")
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print("PORT-THROWS \(throwing.sorted().joined(separator: " "))")
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}
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@Test("dump port yeast for ids in PUREYAML_PORT_DUMP_IDS")
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func test_dump() throws {
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guard let ids = ProcessInfo.processInfo.environment["PUREYAML_PORT_DUMP_IDS"] else { return }
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let cases = ids == "ALL"
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? CanonicalEventCorpus.validCases().map(\.id)
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: ids.split(separator: ",").map(String.init)
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for id in cases {
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let testCase = CanonicalEventCorpus.Case(id: id)
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guard let yaml = testCase.input else { continue }
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print("@@@ID@@@ \(id)")
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do {
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var parser = try PureYAML.Parsing.LibYAML.Parser(yaml)
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try print(parser.parse().map(CanonicalEventCorpus.serialize).joined(separator: "\n"))
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} catch {
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print("@@@ERROR@@@ \(error)")
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}
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print("@@@END@@@")
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}
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}
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}
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private extension String {
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var trimmedTrailing: String {
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var copy = self
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while copy.hasSuffix("\n") {
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copy.removeLast()
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}
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return copy
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}
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}
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