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//
// MullvadApiTests.swift
// MullvadVPN
//
// Created by Steffen Ernst on 2025-02-27.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import MullvadMockData
import MullvadRustRuntime
import MullvadTypes
import Network
import XCTest
@testable import MullvadREST
/// This tests main purpose is to test the functionallity of the FFI rather than every function of the proxy itself.
/// It makes sure the response and errors are parsed correctly.
class MullvadApiTests: XCTestCase {
let encoder = JSONEncoder()
let addressCache = REST.AddressCache(canWriteToCache: false, fileCache: MemoryCache())
func makeApiProxy(port: UInt16) throws -> APIQuerying {
let shadowsocksLoader = ShadowsocksLoaderStub(
configuration: ShadowsocksConfiguration(
address: .ipv4(.loopback),
port: 1080,
password: "123",
cipher: CipherIdentifiers.CHACHA20.description
))
let accessMethodsRepository = AccessMethodRepositoryStub.stub
let context = try MullvadApiContext(
host: "localhost",
address: "\(IPv4Address.loopback.debugDescription):\(port)",
domain: REST.encryptedDNSHostname,
disableTls: true,
shadowsocksProvider: shadowsocksLoader,
accessMethodWrapper: initAccessMethodSettingsWrapper(
methods:
accessMethodsRepository
.fetchAll()
),
addressCacheProvider: addressCache,
accessMethodChangeListeners: []
)
let proxy = REST.MullvadAPIProxy(
transportProvider: APITransportProvider(
requestFactory: .init(
apiContext: context,
encoder: JSONEncoder()
)
),
dispatchQueue: .main,
responseDecoder: REST.Coding.makeJSONDecoder()
)
return proxy
}
func testSuccessfulResponse() async throws {
let expectedEndpoints: [AnyIPEndpoint] = [AnyIPEndpoint(string: "12.34.56.78:80")!]
let bodyData = try encoder.encode(expectedEndpoints)
let body = String(data: bodyData, encoding: .utf8)!
let responseCode: UInt = 200
let mock = mullvad_api_mock_get(
"/app/v1/api-addrs",
UInt(responseCode),
body
)
defer { mullvad_api_mock_drop(mock) }
let apiProxy = try makeApiProxy(port: mock.port)
let result: Result<[AnyIPEndpoint], Error> = await withCheckedContinuation { continuation in
_ =
apiProxy
.getAddressList(
retryStrategy: .noRetry
) { result in
continuation.resume(returning: result)
}
}
guard let receivedEndpoints = result.value else {
XCTFail(result.error!.localizedDescription)
return
}
XCTAssertEqual(receivedEndpoints, expectedEndpoints)
}
func testHTTPError() async throws {
let expectedResponseCode = 500
let mock = mullvad_api_mock_get(
"/app/v1/api-addrs",
UInt(expectedResponseCode),
""
)
defer { mullvad_api_mock_drop(mock) }
let apiProxy = try makeApiProxy(port: mock.port)
let result: Result<[AnyIPEndpoint], Error> = await withCheckedContinuation { continuation in
_ =
apiProxy
.getAddressList(
retryStrategy: .noRetry
) { result in
continuation.resume(returning: result)
}
}
let error = try XCTUnwrap(result.error as? REST.Error)
switch error {
case let .unhandledResponse(responseCode, _):
XCTAssertEqual(responseCode, expectedResponseCode)
default:
XCTFail("GetAddressList failed with the wrong error: \(error)")
}
}
func testInvalidBody() async throws {
let expectedResponseCode = 200
let mock = mullvad_api_mock_get(
"/app/v1/api-addrs",
UInt(expectedResponseCode),
"This is an invalid JSON"
)
defer { mullvad_api_mock_drop(mock) }
let apiProxy = try makeApiProxy(port: mock.port)
let result: Result<[AnyIPEndpoint], Error> = await withCheckedContinuation { continuation in
_ =
apiProxy
.getAddressList(
retryStrategy: .noRetry
) { result in
continuation.resume(returning: result)
}
}
let error = try XCTUnwrap(result.error as? REST.Error)
switch error {
case let .unhandledResponse(_, response):
XCTAssertEqual(response?.code, REST.ServerResponseCode.parsingError)
default:
XCTFail("GetAddressList failed with the wrong error: \(error)")
}
}
func testCustomErrorCode() async throws {
let expectedResponseCode = 400
let expectedErrorCode = 123
let mock = mullvad_api_mock_get(
"/app/v1/api-addrs",
UInt(expectedResponseCode),
"""
{"code": "\(expectedErrorCode)",
"error": "A magical error occurred"
}
"""
)
defer { mullvad_api_mock_drop(mock) }
let apiProxy = try makeApiProxy(port: mock.port)
let result: Result<[AnyIPEndpoint], Error> = await withCheckedContinuation { continuation in
_ =
apiProxy
.getAddressList(
retryStrategy: .noRetry
) { result in
continuation.resume(returning: result)
}
}
let error = try XCTUnwrap(result.error as? REST.Error)
switch error {
case let .unhandledResponse(responseCode, response):
XCTAssertEqual(responseCode, expectedResponseCode)
guard let response else {
XCTFail("Expected error response object, but got nil")
return
}
XCTAssertEqual(response.code.rawValue, String(expectedErrorCode))
default:
XCTFail("GetAddressList failed with the wrong error: \(error)")
}
}
// This test makes sure the body gets encoded correct.
func testSuccessfulPostRequest() async throws {
let problemReportRequest = ProblemReportRequest(
address: "test@email.com",
message: "This test should succeed",
log: "A long log string",
metadata: [:]
)
// The mock server will only responde to requests with `matchBodyString` as body.
let matchBodyString = String(data: try encoder.encode(problemReportRequest), encoding: .utf8)!
let expectedResponseCode: UInt = 204
let mock = mullvad_api_mock_post(
"/app/v1/problem-report",
UInt(expectedResponseCode),
matchBodyString
)
defer { mullvad_api_mock_drop(mock) }
let apiProxy = try makeApiProxy(port: mock.port)
let result: Result<Void, Error> = await withCheckedContinuation { continuation in
_ =
apiProxy
.sendProblemReport(
problemReportRequest,
retryStrategy:
.noRetry
) { result in
continuation.resume(returning: result)
}
}
XCTAssertNil(result.error)
}
}
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