@testable import App
import XCTVapor

final class AppTests: XCTestCase {

    func testEncodingUInt32() {
        let input: UInt32 = 123
        let data = input.encoded
        let output = UInt32(data: data)
        XCTAssertEqual(input, output)
    }

    func testEncodingContent() {
        let input = Message.Content(time: 1234567890, id: 23456789)
        let data = input.encoded
        let output = Message.Content(decodeFrom: data)
        XCTAssertEqual(input, output)
        let data2 = Data([42, 42]) + data
        let output2 = Message.Content(decodeFrom: Data(data2[2...]))
        XCTAssertEqual(input, output2)
    }

    func testEncodingMessage() {
        let input = Message(mac: Data(repeating: 42, count: 32),
                            content: Message.Content(time: 1234567890, id: 23456789))
        let data = input.encoded
        let buffer = ByteBuffer(data: data)
        let output = Message(decodeFrom: buffer)
        XCTAssertEqual(input, output)
    }

    func testSigning() throws {
        let key = SymmetricKey(size: .bits256)
        let content = Message.Content(time: 1234567890, id: 23456789)
        let input = content.authenticate(using: key)
        XCTAssertTrue(input.isValid(using: key))

        let data = content.authenticateAndSerialize(using: key)
        let decoded = Message(decodeFrom: ByteBuffer(data: data))
        XCTAssertNotNil(decoded)
        XCTAssertTrue(decoded!.isValid(using: key))
        XCTAssertEqual(decoded!, input)
        XCTAssertEqual(content, input.content)
    }
}