xUnit/Sources/mocks/UTests3/UnitTests.cs

using Model;
using Moq;

namespace UTests3;

public class UnitTests
{
    [Fact]
    public async Task Test_AddNewNounours_Success()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");
        //setup the mocks
        var mockStore = new Mock<INounoursStore>();
        mockStore.Setup(store => store.Add(nounours)).ReturnsAsync(() => nounours);

        var mockEmailService = new Mock<IEmailService>();
        //mockEmailService.Setup(service => service.AskConfirmation(nounours));

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(mockStore.Object, mockEmailService.Object);

        //execute the method to test
        bool result = await mgr.AddNewNounours(nounours);

        //assert the interactions went correctly
        Assert.True(result);
        mockStore.Verify(store => store.Add(nounours), Times.Once);
        mockStore.Verify(store => store.Remove(nounours), Times.Never);
        mockEmailService.Verify(store => store.AskConfirmation(nounours), Times.Once);
    }

    [Fact]
    public async Task Test_AddNewNounours_Fail_AlreadyExists()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");
        //setup the mocks
        var mockStore = new Mock<INounoursStore>();
        mockStore.Setup(store => store.Add(nounours)).ReturnsAsync(() => null);
        //mockStore.Setup(store => store.Remove(nounours)).ReturnsAsync(true);

        var mockEmailService = new Mock<IEmailService>();

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(mockStore.Object, mockEmailService.Object);

        //execute the method to test
        bool result = await mgr.AddNewNounours(nounours);

        //assert the interactions went correctly
        Assert.False(result);
        mockStore.Verify(store => store.Add(nounours), Times.Once);
        mockStore.VerifyNoOtherCalls();
        mockEmailService.VerifyNoOtherCalls();
    }

    [Fact]
    public async Task Test_AddNewNounours_Fail_BadEmail()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");
        //setup the mocks
        var mockStore = new Mock<INounoursStore>();
        mockStore.Setup(store => store.Add(nounours)).ReturnsAsync(() => nounours);
        mockStore.Setup(store => store.Remove(nounours)).ReturnsAsync(true);
       
        var mockEmailService = new Mock<IEmailService>();
        mockEmailService.Setup(service => service.AskConfirmation(nounours)).Throws<Exception>();

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(mockStore.Object, mockEmailService.Object);

        //execute the method to test
        bool result = await mgr.AddNewNounours(nounours);

        //assert the interactions went correctly
        Assert.False(result);
        mockStore.Verify(store => store.Add(nounours), Times.Once);
        mockStore.Verify(store => store.Remove(nounours), Times.Once);
        mockStore.VerifyNoOtherCalls();
        mockEmailService.Verify(service => service.AskConfirmation(nounours), Times.Once);
        mockEmailService.VerifyNoOtherCalls();
    }

    [Fact]
    public async Task Test_AddNewNounours_Fail_ExceptionWhenRemoving()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");
        //setup the mocks
        var mockStore = new Mock<INounoursStore>();
        mockStore.Setup(store => store.Add(nounours)).ReturnsAsync(() => nounours);
        mockStore.Setup(store => store.Remove(nounours)).ReturnsAsync(false);
        
        var mockEmailService = new Mock<IEmailService>();
        mockEmailService.Setup(service => service.AskConfirmation(nounours)).Throws<Exception>();

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(mockStore.Object, mockEmailService.Object);

        //assert it throws an exception
        _ = await Assert.ThrowsAsync<Exception>(async () => await mgr.AddNewNounours(nounours));
        
        mockStore.Verify(store => store.Add(nounours), Times.Once);
        mockStore.Verify(store => store.Remove(nounours), Times.Once);
        mockStore.VerifyNoOtherCalls();
        mockEmailService.Verify(service => service.AskConfirmation(nounours), Times.Once);
        mockEmailService.VerifyNoOtherCalls();
    }
}