Question

我想对该方法进行单元测试

SignInViewModel.cs

public ICommand LoginCommand { get; }
private async Task LogIn()
{
    var user = _userService.LoginUser(EmailEntry);

    if (user == null)
    {
        await _pageService.DisplayAlert("Alert", "Invalid Credentials", "Ok");
        return;
    }

    if (user.Password != PasswordEntry)
    {
        await _pageService.DisplayAlert("Alert", "Invalid Credentials", "Ok");
        return;
    }

    PasswordEntry = "";
    await _pageService.PushAsync(new HomePage(user));
}

我正在尝试对此进行单元测试，但是没有任何效果，任何人都可以给我示例吗？

Answer 1

您在这里。

[TestFixture]
public class Fixture
{
    private Mock<IUserService> _userService;
    private Mock<IPageService> _pageService;

    [SetUp]
    public void Setup()
    {
        _userService = new Mock<IUserService>();
        _pageService = new Mock<IPageService>();
    }

    [Test]
    public void LoginUserShouldBeCalled()
    {
        // Given
        var vm = CreateInstance();
        vm.EmailEntry = "email?";

        // When
        vm.LoginCommand.Execute(null);

        // Then
        _userService.Verify(x => x.LoginUser("email?"), Times.Once);
        _userService.VerifyNoOtherCalls();
    }

    [Test]
    public void DisplayAlertShouldBeCalledForNotFoundUser()
    {
        // Given
        var vm = CreateInstance();
        vm.EmailEntry = "not@found.user";
        _userService.Setup(x => x.LoginUser("not@found.user")).Returns((User)null).Verifiable();

        // When
        vm.LoginCommand.Execute(null);

        // Then
        _userService.Verify();
        _pageService.Verify(x => x.DisplayAlert(It.IsAny<string>(), "Invalid Credentials", It.IsAny<string>()));
        _pageService.VerifyNoOtherCalls();
    }

    [Test]
    public void DisplayAlertShouldBeCalledForInvalidPassword()
    {
        // Given
        var vm = CreateInstance();
        vm.EmailEntry    = "test@email.ru";
        vm.PasswordEntry = "password";
        _userService.Setup(x => x.LoginUser(It.IsAny<string>())).Returns(new User(vm.EmailEntry, "ppppp")).Verifiable();

        // When
        vm.LoginCommand.Execute(null);

        // Then
        _userService.Verify();
        _pageService.Verify(x => x.DisplayAlert(It.IsAny<string>(), "Invalid Credentials", It.IsAny<string>()));
        _pageService.VerifyNoOtherCalls();
    }

    [Test]
    public void DisplayAlertShouldBeCalledForInvalidPassword2()
    {
        // Given
        var vm = CreateInstance();
        vm.EmailEntry    = "test@email.ru";
        vm.PasswordEntry = "password";
        User user = new User(vm.EmailEntry, vm.PasswordEntry);
        _userService.Setup(x => x.LoginUser(It.IsAny<string>())).Returns(user).Verifiable();

        // When
        vm.LoginCommand.Execute(null);

        // Then
        _userService.Verify();
        _pageService.Verify(x => x.PushAsync(It.Is<HomePage>(x => x.User == user)));
        _pageService.VerifyNoOtherCalls();
        vm.PasswordEntry.Should().BeEmpty();
    }

    private SignInViewModel CreateInstance()
    {
        return new SignInViewModel(_userService.Object, _pageService.Object);
    }
}

您可以在这里https://github.com/zanybaka/StackOverflow.com/tree/master/Questions/63741243

我想对该登录方法进行单元测试

1 个答案: