@testable import PureYAML
import Testing

@Suite("Multiline implicit keys")
struct MultilineImplicitKeyTests {
    @Test("A quoted block implicit key that spans lines is rejected", arguments: [
        "\"c\n d\": 1\n", // a double-quoted key across two lines
        "'c\n d': 1\n", // a single-quoted key across two lines
    ])
    func test_multilineBlockKeyRejected(_ yaml: String) throws {
        #expect(throws: PureYAML.Parsing.ParseError.self) {
            try PureYAML.parse(yaml)
        }
    }

    @Test("Single-line keys, multiline values, flow keys, and explicit keys stay valid", arguments: [
        "\"a b\": 1\n", // a single-line quoted key
        "k: \"a\n b\"\n", // a multiline quoted value (not a key), continuation indented
        "{ \"a\nb\": 1 }\n", // a flow mapping key may span lines
        "---\n- { \"multi\n  line\": value}\n", // a multiline flow key inside a sequence
        "? \"a\n  b\"\n: v\n", // an explicit key may span lines, continuation indented
    ])
    func test_validQuotedKeysAndValues(_ yaml: String) throws {
        _ = try PureYAML.parse(yaml)
    }
}