PureYAML/Tests/ParsingErrorPathTests.swift
Mihaela Mihaljevic a8950e118c Merge conformance/yaml-test-suite-gaps: the libyaml port becomes the engine on main
The ported engine wins every conflict: main's post-fork patches to the
hand-rolled Scanner and TokenEventParser land on deleted files and are
dropped; their behaviors are carried by the port and guarded by the
whole-suite conformance gate (402/402 passing).

Merge adaptations, all gates green (style, namespacing, forbidden
patterns, changelog, roadmap, swiftformat, swiftlint strict, build,
full test suite, whole-suite conformance sweep):

- PureYAMLJSON representability rules move onto the Check algebra,
  replacing the retired legacy Rule type.
- The permissive tag-handle pre-pass is removed; the port rejects an
  undefined handle at parse time (suite case QLJ7) and the validation
  report carries it as a parse diagnostic.
- EventStreamComposer's nested types split one-per-file per the
  namespacing gate.
- Tests pinned to old-engine behavior were re-verified against the
  reference and updated: libyaml rejects an explicit-key continuation
  ending at a value colon, and suite case QB6E requires rejecting a
  quoted continuation at column 0.
- CHANGELOG unreleased entries from both lines are preserved in two
  groups with a provenance note.

Closes #1, closes #3
2026-07-05 00:23:48 +02:00

46 lines
1.9 KiB
Swift

@testable import PureYAML
import Testing
@Suite("Parsing Error Paths")
struct ParsingErrorPathTests {
@Test("A node property with no following node is an empty (null) node")
func test_danglingNodePropertyIsEmptyNode() throws {
// A property always attaches to a node, and an empty node is allowed, so a dangling anchor
// or tag denotes a null node carrying that property rather than being an error.
#expect(try PureYAML.parse("&anchor\n") == .null)
#expect(try PureYAML.parse("root:\n key: &a\nother: 1\n") == .mapping(.init([
.init(key: "root", value: .mapping(.init([.init(key: "key", value: .null)]))),
.init(key: "other", value: .int(1)),
])))
}
@Test("An unterminated flow mapping throws at stream end")
func test_unterminatedFlowMappingThrows() {
expectParseError("x: {a: b", .malformed(
reason: "while parsing a flow mapping, did not find expected ',' or '}'",
line: 1,
column: 4,
))
}
@Test("Block scalar content less indented than the explicit indicator throws")
func test_explicitBlockScalarIndentationUnderIndentThrows() {
expectParseError("k: |2\n a\n", .malformed(
reason: "while parsing a block mapping, did not find expected key",
line: 1,
column: 1,
))
}
@Test("Diagnostic validation reports an invalid merge value via the buffered composer")
func test_diagnosticValidationRejectsInvalidMergeValue() {
let report = PureYAML.diagnosticValidationReport("a: &x 1\nb:\n <<: *x\n", file: "merge.yaml")
#expect(!report.isValid)
#expect(report.diagnostics.count == 1)
let diagnostic = report.diagnostics.first
#expect(diagnostic?.kind == .parse)
#expect(diagnostic?.code == "invalidMergeValue")
#expect(diagnostic?.line == 3)
}
}