Mihaela Mihaljevic
bf069fad39
PureYAMLJSON is a separate library product layered on the core engine. JSON is a subset of YAML 1.2, so the existing parser already reads both into one value tree; this product adds the missing half and the value-level policy: - JSON.Writer: a pure-Swift RFC-8259 serializer (no Foundation; WASI-clean), pretty or compact, rejecting non-string keys and non-finite numbers. - JSON representability rules expressed in PureYAML's own Validation framework: mappingKeysAreStrings and numbersAreFinite join the core mappingKeysAreUnique. - JSON.Validator: the representability rule set plus issues(for:)/isRepresentable. - JSON.Convert: standalone convert(_:to:) with the round-trip law (parse -> validate representability -> emit -> re-parse must equal the source). To JSON rejects complex keys and non-finite numbers; to YAML rejects duplicate keys, which are legal in JSON but not in YAML. 19 tests cover the writer, the rules, and both conversion directions including the dual-rejection edges. Carved out of the catch-all Sources/Tests paths via exclude so the core PureYAML target is unchanged.
74 lines
3.2 KiB
Swift
74 lines
3.2 KiB
Swift
import PureYAML
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@testable import PureYAMLJSON
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import Testing
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@Suite("JSON Convert both directions")
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struct JSONConvertTests {
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private let sampleJSON = """
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{"name": "PureYAML", "n": 1, "ratio": 1.5, "open": true, "tags": ["yaml", "json"], "nested": {"a": 1, "b": [null, false]}}
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"""
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@Test("JSON to YAML is block style and round-trips to the same value")
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func test_jsonToYAML() throws {
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let yaml = try PureYAML.JSON.Convert.convert(sampleJSON, to: .yaml)
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#expect(!yaml.hasPrefix("{"))
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#expect(yaml.contains("name: PureYAML"))
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#expect(yaml.contains("tags:"))
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#expect(try PureYAML.parse(yaml) == PureYAML.parse(sampleJSON))
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}
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@Test("YAML to JSON round-trips to the same value")
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func test_yamlToJSON() throws {
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let yaml = "name: PureYAML\nn: 1\nlist:\n - a\n - 2\nnested:\n flag: true"
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let json = try PureYAML.JSON.Convert.convert(yaml, to: .json, pretty: false)
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#expect(json.hasPrefix("{"))
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#expect(try PureYAML.parse(json) == PureYAML.parse(yaml))
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}
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@Test("JSON to YAML to JSON returns the original document")
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func test_jsonRoundTripThroughYAML() throws {
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let yaml = try PureYAML.JSON.Convert.convert(sampleJSON, to: .yaml)
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let json = try PureYAML.JSON.Convert.convert(yaml, to: .json, pretty: false)
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#expect(json == "{\"name\":\"PureYAML\",\"n\":1,\"ratio\":1.5,\"open\":true,\"tags\":[\"yaml\",\"json\"],\"nested\":{\"a\":1,\"b\":[null,false]}}")
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}
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@Test("YAML to JSON to YAML returns an equivalent document")
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func test_yamlRoundTripThroughJSON() throws {
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let yaml = "count: 3\nratio: 0.25\nitems:\n - x\n - y\nflag: false"
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let value = try PureYAML.parse(yaml)
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let json = try PureYAML.JSON.Convert.convert(yaml, to: .json)
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let backToYAML = try PureYAML.JSON.Convert.convert(json, to: .yaml)
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#expect(try PureYAML.parse(backToYAML) == value)
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}
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@Test("A string that looks like a bool stays a string both ways")
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func test_stringLikeBoolPreserved() throws {
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let json = "{\"a\": true, \"b\": \"true\"}"
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let yaml = try PureYAML.JSON.Convert.convert(json, to: .yaml)
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#expect(try PureYAML.parse(yaml) == PureYAML.parse(json))
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let backToJSON = try PureYAML.JSON.Convert.convert(yaml, to: .json, pretty: false)
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#expect(backToJSON == "{\"a\":true,\"b\":\"true\"}")
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}
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@Test("Duplicate keys are rejected both ways (legal JSON, illegal YAML)")
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func test_duplicateKeysRejected() {
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let duplicated = "{\"a\": 1, \"a\": 2}"
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#expect(throws: PureYAML.JSON.Convert.Failure.self) {
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_ = try PureYAML.JSON.Convert.convert(duplicated, to: .yaml)
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}
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#expect(throws: PureYAML.JSON.Convert.Failure.self) {
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_ = try PureYAML.JSON.Convert.convert(duplicated, to: .json)
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}
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}
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@Test("A complex YAML key blocks JSON but converts to YAML")
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func test_complexKeyJSONvsYAML() throws {
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let yaml = "? [1, 2]\n: value"
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#expect(throws: PureYAML.JSON.Convert.Failure.self) {
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_ = try PureYAML.JSON.Convert.convert(yaml, to: .json)
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}
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let asYAML = try PureYAML.JSON.Convert.convert(yaml, to: .yaml)
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#expect(try PureYAML.parse(asYAML) == PureYAML.parse(yaml))
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}
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}
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