Mihaela Mihaljevic
9ce57e86e5
Stage 2 of the faithful libyaml scanner port. Translates yaml_parser_save_simple_key, yaml_parser_remove_simple_key, yaml_parser_stale_simple_keys, and the flow-level push/pop (yaml_parser_increase_flow_level / decrease) onto a new PureYAML.Parsing.LibYAML.Scanner aggregate that embeds the indent engine. The simple-key mechanism is what lets a quoted scalar, a nested collection, or a property-carrying node become a mapping key when a ':' follows, and is required exactly at the block indent. Modelled faithfully: a potential key goes stale once it spans a line break or exceeds 1024 characters, and a required key that is removed or goes stale is the 'could not find expected colon' error. Unit-tested for the required/not-required, removal-error, staleness, and flow-level cases. No public behavior changed yet.
67 lines
2.9 KiB
Swift
67 lines
2.9 KiB
Swift
@testable import PureYAML
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import Testing
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/// Verifies the ported simple-key mechanism (`save_simple_key`,
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/// `remove_simple_key`, `stale_simple_keys`, flow-level push/pop) reproduces
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/// libyaml's behavior.
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@Suite("LibYAML Simple Key")
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struct LibYAMLSimpleKeyTests {
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private func mark(line: Int, column: Int, index: Int) -> PureYAML.Parsing.Mark {
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PureYAML.Parsing.Mark(line: line, column: column, index: index)
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}
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@Test("saves a possible key, required when it sits at the block indent")
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func test_saveSimpleKeyRequiredAtIndent() throws {
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var scanner = PureYAML.Parsing.LibYAML.Scanner()
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scanner.indentEngine.rollIndent(column: 0, number: -1, type: .blockMappingStart, mark: .start)
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scanner.mark = mark(line: 1, column: 0, index: 0)
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try scanner.saveSimpleKey()
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#expect(scanner.simpleKeys.last?.possible == true)
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#expect(scanner.simpleKeys.last?.required == true)
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}
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@Test("a key not at the block indent is possible but not required")
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func test_saveSimpleKeyNotRequired() throws {
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var scanner = PureYAML.Parsing.LibYAML.Scanner()
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scanner.indentEngine.rollIndent(column: 0, number: -1, type: .blockMappingStart, mark: .start)
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scanner.mark = mark(line: 1, column: 4, index: 4)
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try scanner.saveSimpleKey()
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#expect(scanner.simpleKeys.last?.possible == true)
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#expect(scanner.simpleKeys.last?.required == false)
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}
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@Test("removing a required possible key is an error")
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func test_removeRequiredKeyThrows() throws {
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var scanner = PureYAML.Parsing.LibYAML.Scanner()
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scanner.indentEngine.rollIndent(column: 0, number: -1, type: .blockMappingStart, mark: .start)
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scanner.mark = mark(line: 1, column: 0, index: 0)
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try scanner.saveSimpleKey()
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#expect(throws: PureYAML.Parsing.LibYAML.ScannerError.self) {
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try scanner.removeSimpleKey()
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}
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}
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@Test("a non-required key on an earlier line goes stale without error")
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func test_staleNonRequiredKey() throws {
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var scanner = PureYAML.Parsing.LibYAML.Scanner()
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scanner.indentEngine.rollIndent(column: 0, number: -1, type: .blockMappingStart, mark: .start)
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scanner.mark = mark(line: 1, column: 4, index: 4)
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try scanner.saveSimpleKey()
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scanner.mark = mark(line: 2, column: 0, index: 10)
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try scanner.staleSimpleKeys()
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#expect(scanner.simpleKeys.last?.possible == false)
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}
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@Test("flow level pushes and pops a simple-key slot")
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func test_flowLevelStack() {
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var scanner = PureYAML.Parsing.LibYAML.Scanner()
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#expect(scanner.simpleKeys.count == 1)
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scanner.increaseFlowLevel()
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#expect(scanner.flowLevel == 1)
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#expect(scanner.simpleKeys.count == 2)
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scanner.decreaseFlowLevel()
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#expect(scanner.flowLevel == 0)
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#expect(scanner.simpleKeys.count == 1)
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}
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}
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