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//
// MultihopDecisionFlowTests.swift
// MullvadVPNTests
//
// Created by Jon Petersson on 2024-06-14.
// Copyright © 2025 Mullvad VPN AB. All rights reserved.
//
import MullvadMockData
import XCTest
@testable import MullvadREST
@testable import MullvadSettings
@testable import MullvadTypes
class MultihopDecisionFlowTests: XCTestCase {
let sampleRelays = ServerRelaysResponseStubs.sampleRelays
func testOneToOneCanHandle() throws {
let oneToOne = OneToOne(next: nil, relayPicker: picker)
XCTAssertTrue(
oneToOne.canHandle(
entryCandidates: [seSto6],
exitCandidates: [seSto2]
))
XCTAssertFalse(
oneToOne.canHandle(
entryCandidates: [seSto2, seSto6],
exitCandidates: [seSto2]
))
XCTAssertFalse(
oneToOne.canHandle(
entryCandidates: [seSto2, seSto6],
exitCandidates: [seSto2, seSto6]
))
}
func testOneToManyCanHandle() throws {
let oneToMany = OneToMany(next: nil, relayPicker: picker)
XCTAssertTrue(
oneToMany.canHandle(
entryCandidates: [seSto2],
exitCandidates: [seSto2, seSto6]
))
XCTAssertFalse(
oneToMany.canHandle(
entryCandidates: [seSto6],
exitCandidates: [seSto2]
))
XCTAssertFalse(
oneToMany.canHandle(
entryCandidates: [seSto2, seSto6],
exitCandidates: [seSto2, seSto6]
))
}
func testManyToOneCanHandle() throws {
let manyToOne = ManyToOne(next: nil, relayPicker: picker)
XCTAssertTrue(
manyToOne.canHandle(
entryCandidates: [seSto2, seSto6],
exitCandidates: [seSto2]
))
XCTAssertFalse(
manyToOne.canHandle(
entryCandidates: [seSto6],
exitCandidates: [seSto2]
))
XCTAssertFalse(
manyToOne.canHandle(
entryCandidates: [seSto2, seSto6],
exitCandidates: [seSto2, seSto6]
))
}
func testManyToManyCanHandle() throws {
let manyToMany = ManyToMany(next: nil, relayPicker: picker)
XCTAssertTrue(
manyToMany.canHandle(
entryCandidates: [seSto2, seSto6],
exitCandidates: [seSto2, seSto6]
))
XCTAssertFalse(
manyToMany.canHandle(
entryCandidates: [seSto6],
exitCandidates: [seSto2]
))
XCTAssertFalse(
manyToMany.canHandle(
entryCandidates: [seSto2, seSto6],
exitCandidates: [seSto2]
))
}
func testOneToOnePick() throws {
let oneToOne = OneToOne(next: nil, relayPicker: picker)
let entryCandidates = [seSto2]
let exitCandidates = [seSto6]
let selectedRelays = try oneToOne.pick(
entryCandidates: entryCandidates,
exitCandidates: exitCandidates,
daitaAutomaticRouting: false
)
XCTAssertEqual(selectedRelays.entry?.hostname, "se2-wireguard")
XCTAssertEqual(selectedRelays.exit.hostname, "se6-wireguard")
}
func testOneToManyPick() throws {
let oneToMany = OneToMany(next: nil, relayPicker: picker)
let entryCandidates = [seSto2]
let exitCandidates = [seSto2, seSto6]
let selectedRelaysWithoutSmartRouting = try oneToMany.pick(
entryCandidates: entryCandidates,
exitCandidates: exitCandidates,
daitaAutomaticRouting: false
)
XCTAssertEqual(selectedRelaysWithoutSmartRouting.entry?.hostname, "se2-wireguard")
XCTAssertEqual(selectedRelaysWithoutSmartRouting.exit.hostname, "se6-wireguard")
let selectedRelaysWithSmartRouting = try XCTUnwrap(
oneToMany.pick(
entryCandidates: [seSto2],
exitCandidates: [seSto2, seSto6],
daitaAutomaticRouting: true
))
XCTAssertEqual(selectedRelaysWithSmartRouting.entry?.hostname, "se2-wireguard")
XCTAssertEqual(selectedRelaysWithSmartRouting.exit.hostname, "se6-wireguard")
}
func testManyToOnePick() throws {
let manyToOne = ManyToOne(next: nil, relayPicker: picker)
let entryCandidates = [seSto2, seSto6]
let exitCandidates = [seSto2]
let selectedRelays = try manyToOne.pick(
entryCandidates: entryCandidates,
exitCandidates: exitCandidates,
daitaAutomaticRouting: false
)
XCTAssertEqual(selectedRelays.entry?.hostname, "se6-wireguard")
XCTAssertEqual(selectedRelays.exit.hostname, "se2-wireguard")
}
func testManyToManyPick() throws {
let manyToMany = ManyToMany(next: nil, relayPicker: picker)
let entryCandidates = [seSto2, seSto6]
let exitCandidates = [seSto2, seSto6]
let selectedRelays = try manyToMany.pick(
entryCandidates: entryCandidates,
exitCandidates: exitCandidates,
daitaAutomaticRouting: false
)
if selectedRelays.exit.hostname == "se2-wireguard" {
XCTAssertEqual(selectedRelays.entry?.hostname, "se6-wireguard")
} else {
XCTAssertEqual(selectedRelays.entry?.hostname, "se2-wireguard")
}
}
}
extension MultihopDecisionFlowTests {
var picker: MultihopPicker {
let obfuscation = RelayObfuscator(
relays: sampleRelays,
tunnelSettings: LatestTunnelSettings(),
connectionAttemptCount: 0, obfuscationBypass: IdentityObfuscationProvider()
).obfuscate()
var tunnelSettings = LatestTunnelSettings()
tunnelSettings.relayConstraints = RelayConstraints(
entryLocations: .only(UserSelectedRelays(locations: [.city("se", "sto")])),
exitLocations: .only(UserSelectedRelays(locations: [.city("se", "sto")]))
)
return MultihopPicker(
obfuscation: obfuscation,
tunnelSettings: tunnelSettings,
connectionAttemptCount: 0
)
}
var seSto2: RelayWithLocation<REST.ServerRelay> {
let relay = sampleRelays.wireguard.relays.first { $0.hostname == "se2-wireguard" }!
let serverLocation = sampleRelays.locations["se-sto"]!
let location = Location(
country: serverLocation.country,
countryCode: serverLocation.country,
city: serverLocation.city,
cityCode: "se-sto",
latitude: serverLocation.latitude,
longitude: serverLocation.longitude
)
return RelayWithLocation(relay: relay, serverLocation: location)
}
var seSto6: RelayWithLocation<REST.ServerRelay> {
let relay = sampleRelays.wireguard.relays.first { $0.hostname == "se6-wireguard" }!
let serverLocation = sampleRelays.locations["se-sto"]!
let location = Location(
country: serverLocation.country,
countryCode: serverLocation.country,
city: serverLocation.city,
cityCode: "se-sto",
latitude: serverLocation.latitude,
longitude: serverLocation.longitude
)
return RelayWithLocation(relay: relay, serverLocation: location)
}
}
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