computer/tests/VMVirtualizationServiceTests.swift

import Foundation
import Testing
import Virtualization
@testable import lume

@Test("VMVirtualizationService starts correctly")
func testVMVirtualizationServiceStart() async throws {
    let service = MockVMVirtualizationService()
    
    // Initial state
    #expect(await service.state == .stopped)
    #expect(await service.startCallCount == 0)
    
    // Start service
    try await service.start()
    #expect(await service.state == .running)
    #expect(await service.startCallCount == 1)
}

@Test("VMVirtualizationService stops correctly")
func testVMVirtualizationServiceStop() async throws {
    let service = MockVMVirtualizationService()
    
    // Start then stop
    try await service.start()
    try await service.stop()
    
    #expect(await service.state == .stopped)
    #expect(await service.stopCallCount == 1)
}

@Test("VMVirtualizationService handles pause and resume")
func testVMVirtualizationServicePauseResume() async throws {
    let service = MockVMVirtualizationService()
    
    // Start and pause
    try await service.start()
    try await service.pause()
    #expect(await service.state == .paused)
    #expect(await service.pauseCallCount == 1)
    
    // Resume
    try await service.resume()
    #expect(await service.state == .running)
    #expect(await service.resumeCallCount == 1)
}

@Test("VMVirtualizationService handles operation failures")
func testVMVirtualizationServiceFailures() async throws {
    let service = MockVMVirtualizationService()
    await service.configure(shouldFail: true)
    
    // Test start failure
    do {
        try await service.start()
        #expect(Bool(false), "Expected start to throw")
    } catch let error as VMError {
        switch error {
        case .internalError(let message):
            #expect(message == "Mock operation failed")
        default:
            #expect(Bool(false), "Unexpected error type: \(error)")
        }
    }
    
    #expect(await service.state == .stopped)
    #expect(await service.startCallCount == 1)
}