@testable import PureYAML
import Testing

@Suite("Explicit keys")
struct ExplicitKeyTests {
    @Test("Explicit keys with no value each map to null")
    func test_explicitKeysWithoutValuesMapToNull() throws {
        // Several `? key` entries in a row (a set, for instance) are valid; each maps to null.
        let value = try PureYAML.parse("""
        ? a
        ? b
        c:
        """)
        #expect(value == .mapping(.init([
            .init(key: "a", value: .null),
            .init(key: "b", value: .null),
            .init(key: "c", value: .null),
        ])))
    }

    @Test("Explicit keys with values still parse")
    func test_explicitKeysWithValues() throws {
        let value = try PureYAML.parse("""
        ? a
        : b
        ? c
        : d
        """)
        #expect(value == .mapping(.init([
            .init(key: "a", value: .string("b")),
            .init(key: "c", value: .string("d")),
        ])))
    }
}