import XCTest
@testable import LCFeatureControl

final class FeatureControlJSONTests: XCTestCase {

    private func decode(_ json: String) throws -> FeatureControlJSON {
        try JSONDecoder().decode(FeatureControlJSON.self, from: Data(json.utf8))
    }

    func testDecodesNull() throws {
        XCTAssertEqual(try decode("null"), .null)
    }

    func testDecodesBool() throws {
        XCTAssertEqual(try decode("true"), .bool(true))
    }

    func testDecodesNumber() throws {
        XCTAssertEqual(try decode("5"), .number(5))
    }

    func testDecodesString() throws {
        XCTAssertEqual(try decode("\"hello\""), .string("hello"))
    }

    func testDecodesArray() throws {
        XCTAssertEqual(try decode("[\"a\",\"b\"]"), .array([.string("a"), .string("b")]))
    }

    func testDecodesNestedObject() throws {
        let json = #"{"limit": 5, "tags": ["a","b"], "nested": {"x": true}}"#
        let value = try decode(json)
        guard case let .object(object) = value else {
            return XCTFail("expected .object, got \(value)")
        }
        XCTAssertEqual(object["limit"], .number(5))
        XCTAssertEqual(object["tags"], .array([.string("a"), .string("b")]))
        XCTAssertEqual(object["nested"], .object(["x": .bool(true)]))
    }
}