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DeviceAuthenticatorTests.swift
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//
// DeviceAuthenticatorTests.swift
//
// Copyright © 2022 DuckDuckGo. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
import Foundation
import XCTest
@testable import DuckDuckGo_Privacy_Browser
class DeviceAuthenticatorTests: XCTestCase {
private func waitResult(for expectations: [XCTestExpectation], timeout: TimeInterval) -> XCTWaiter.Result {
XCTWaiter.wait(for: expectations, timeout: 0.2)
}
// MARK: - Tests
func testWhenAutoLockIsEnabled_AndDeviceIsLocked_ThenRequiresAuthenticationIsTrue() {
let mockStatisticsStore = MockStatisticsStore()
let authenticationService = MockDeviceAuthenticatorService.alwaysAuthenticate
let preferences = AutofillPreferences(statisticsStore: mockStatisticsStore)
preferences.isAutoLockEnabled = true
let deviceAuthenticator = DeviceAuthenticator(authenticationService: authenticationService, autofillPreferences: preferences)
XCTAssertTrue(deviceAuthenticator.requiresAuthentication)
}
func testWhenAutoLockIsEnabled_AndDeviceIsLocked_AndAuthenticationIsGranted_ThenRequiresAuthenticationIsFalse() async {
let mockStatisticsStore = MockStatisticsStore()
let authenticationService = MockDeviceAuthenticatorService.alwaysAuthenticate
let preferences = AutofillPreferences(statisticsStore: mockStatisticsStore)
preferences.isAutoLockEnabled = true
let deviceAuthenticator = DeviceAuthenticator(authenticationService: authenticationService, autofillPreferences: preferences)
let result = await deviceAuthenticator.authenticateUser(reason: .unlockLogins)
XCTAssertTrue(result.authenticated)
XCTAssertFalse(deviceAuthenticator.requiresAuthentication)
}
func testWhenAutoLockIsEnabled_AndDeviceIsLocked_AndAuthenticationIsDenied_ThenRequiresAuthenticationIsFalse() async {
let mockStatisticsStore = MockStatisticsStore()
let authenticationService = MockDeviceAuthenticatorService.neverAuthenticate
let preferences = AutofillPreferences(statisticsStore: mockStatisticsStore)
preferences.isAutoLockEnabled = true
let deviceAuthenticator = DeviceAuthenticator(authenticationService: authenticationService, autofillPreferences: preferences)
let result = await deviceAuthenticator.authenticateUser(reason: .unlockLogins)
XCTAssertFalse(result.authenticated)
XCTAssertTrue(deviceAuthenticator.requiresAuthentication)
}
func testWhenAutoLockIsEnabled_AndDeviceIsUnlocked_AndAuthenticationIsRequested_ThenAuthenticationSucceedsWithoutPrompting() async {
let mockStatisticsStore = MockStatisticsStore()
let authenticationService = MockDeviceAuthenticatorService.alwaysAuthenticate
let preferences = AutofillPreferences(statisticsStore: mockStatisticsStore)
preferences.isAutoLockEnabled = true
let deviceAuthenticator = DeviceAuthenticator(authenticationService: authenticationService, autofillPreferences: preferences)
let initialResult = await deviceAuthenticator.authenticateUser(reason: .unlockLogins)
XCTAssertTrue(initialResult.authenticated)
XCTAssertFalse(deviceAuthenticator.requiresAuthentication)
XCTAssertEqual(authenticationService.authenticationAttempts, 1)
let successfulResult = await deviceAuthenticator.authenticateUser(reason: .unlockLogins)
XCTAssertTrue(successfulResult.authenticated)
XCTAssertFalse(deviceAuthenticator.requiresAuthentication)
XCTAssertEqual(authenticationService.authenticationAttempts, 1)
}
func testWhenAutoLockIsDisabled_ThenRequiresAuthenticationIsFalse() {
let mockStatisticsStore = MockStatisticsStore()
let authenticationService = MockDeviceAuthenticatorService.alwaysAuthenticate
let preferences = AutofillPreferences(statisticsStore: mockStatisticsStore)
preferences.isAutoLockEnabled = false
let deviceAuthenticator = DeviceAuthenticator(authenticationService: authenticationService, autofillPreferences: preferences)
XCTAssertFalse(deviceAuthenticator.requiresAuthentication)
}
func testWhenAutoLockIsEnabled_AndDeviceIsUnlocked_AndDeviceIsIdleForLongerThanTheThreshold_ThenDeviceBecomesLocked() async {
let mockStatisticsStore = MockStatisticsStore()
let idleStateProvider = MockIdleStateProvider(idleDuration: 60 * 20) // 20 minute idle duration, to be safe
let authenticationService = MockDeviceAuthenticatorService.alwaysAuthenticate
let preferences = AutofillPreferences(statisticsStore: mockStatisticsStore)
preferences.isAutoLockEnabled = true
preferences.autoLockThreshold = .fifteenMinutes
DeviceAuthenticator.Constants.intervalBetweenIdleChecks = 0.1
let deviceAuthenticator = DeviceAuthenticator(idleStateProvider: idleStateProvider,
authenticationService: authenticationService,
autofillPreferences: preferences)
_ = await deviceAuthenticator.authenticateUser(reason: .unlockLogins)
XCTAssertFalse(deviceAuthenticator.requiresAuthentication)
let expectation = expectation(description: "Wait for the authenticator to become locked")
let result = waitResult(for: [expectation], timeout: 0.2)
if result == .timedOut {
XCTAssertTrue(deviceAuthenticator.requiresAuthentication)
} else {
XCTFail("Didn't wait for the expectation to time out")
}
}
func testWhenAutoLockIsEnabled_AndDeviceIsUnlocked_AndDeviceIsIdleForLessThanTheThreshold_ThenDeviceDoesNotLock() async {
let mockStatisticsStore = MockStatisticsStore()
let idleStateProvider = MockIdleStateProvider(idleDuration: 60)
let authenticationService = MockDeviceAuthenticatorService.alwaysAuthenticate
let preferences = AutofillPreferences(statisticsStore: mockStatisticsStore)
preferences.isAutoLockEnabled = true
preferences.autoLockThreshold = .fifteenMinutes
let deviceAuthenticator = DeviceAuthenticator(idleStateProvider: idleStateProvider,
authenticationService: authenticationService,
autofillPreferences: preferences)
_ = await deviceAuthenticator.authenticateUser(reason: .unlockLogins)
XCTAssertFalse(deviceAuthenticator.requiresAuthentication)
let expectation = expectation(description: "Wait for the authenticator to become locked")
let result = await XCTWaiter.fulfillment(of: [expectation], timeout: 0.2)
if result == .timedOut {
XCTAssertFalse(deviceAuthenticator.requiresAuthentication)
} else {
XCTFail("Didn't wait for the expectation to time out")
}
}
}
// MARK: - Dependencies
private final class MockDeviceAuthenticatorService: DeviceAuthenticationService {
static var alwaysAuthenticate: MockDeviceAuthenticatorService {
MockDeviceAuthenticatorService(shouldBeAuthenticated: true)
}
static var neverAuthenticate: MockDeviceAuthenticatorService {
MockDeviceAuthenticatorService(shouldBeAuthenticated: false)
}
var authenticationAttempts = 0
private let shouldBeAuthenticated: Bool
init(shouldBeAuthenticated: Bool) {
self.shouldBeAuthenticated = shouldBeAuthenticated
}
func authenticateDevice(reason: String, result: @escaping DeviceAuthenticationResultHandler) {
authenticationAttempts += 1
result(shouldBeAuthenticated ? .success : .failure)
}
}
private struct MockIdleStateProvider: DeviceIdleStateProvider {
let idleDuration: TimeInterval
func secondsSinceLastEvent() -> TimeInterval {
return idleDuration
}
}