xUnit/Sources/mocks/UTests2/UnitTests.cs

using Model;

namespace UTests2;

public class UnitTests
{
    [Fact]
    public async Task Test_AddNewNounours_Success()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");

        //setup the mocks
        MockNounoursStore nounoursStore = new MockNounoursStore
        {
            Add = n =>
            {
                Assert.Equal(nounours.Email, n?.Email);
                return n;
            }
        };

        MockEmailService emailService = new MockEmailService
        {
            AskConfirmation = n =>
            {
                Assert.Equal("chucky.chucky@hell.com", n.Email);
                return true;
            }
        };

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(nounoursStore, emailService);

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

        //assert the result is correct
        Assert.True(result);
    }

    [Fact]
    public async Task Test_AddNewNounours_Fail_AlreadyExists()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");

        //setup the mocks
        MockNounoursStore nounoursStore = new MockNounoursStore
        {
            Add = n =>
            {
                Assert.Equal(nounours.Email, n?.Email);
                return null;
            },
            Remove = n =>
            {
                Assert.Equal(nounours.Email, n?.Email);
                return true;
            }
        };
        MockEmailService emailService = new MockEmailService
        {
            AskConfirmation = n =>
            {
                Assert.Equal("chucky.chucky@hell.com", n.Email);
                return true;
            }
        };

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(nounoursStore, emailService);

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

        //assert the result is correct
        Assert.False(result);
    }

    [Fact]
    public async Task Test_AddNewNounours_Fail_BadEmail()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");

        //setup the mocks
        MockNounoursStore nounoursStore = new MockNounoursStore
        {
            Add = n =>
            {
                Assert.Equal(nounours.Email, n?.Email);
                return n;
            },
            Remove = n =>
            {
                Assert.Equal(nounours.Email, n?.Email);
                return true;
            }
        };
        MockEmailService emailService = new MockEmailService
        {
            AskConfirmation = n =>
            {
                Assert.Equal(nounours.Email, n.Email);
                return false;
            }
        };

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(nounoursStore, emailService);

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

        //assert the result is correct
        Assert.False(result);
    }

    [Fact]
    public async Task Test_AddNewNounours_Fail_ExceptionWhenRemoving()
    {
        var nounours = new Nounours("chucky.chucky@hell.com");

        //setup the mocks
        MockNounoursStore nounoursStore = new MockNounoursStore
        {
            Add = n =>
            {
                Assert.Equal(nounours.Email, n?.Email);
                return n;
            },
            Remove = n =>
            {
                Assert.Equal(nounours.Email, n?.Email);
                return false;
            }
        };
        MockEmailService emailService = new MockEmailService
        {
            AskConfirmation = n =>
            {
                Assert.Equal("chucky.chucky@hell.com", n.Email);
                return false;
            }
        };

        //setup the subject-under-test
        NounoursManager mgr = new NounoursManager(nounoursStore, emailService);
        

        //assert it throws an exception
        _ = await Assert.ThrowsAsync<Exception>(async () => await mgr.AddNewNounours(nounours));
    }
}