Dynamic Mock

#how to use DynaMock

    //auto create DI
    var _testSevice = DynaMock.NewInstance<TestService>() 
    
    //get created DI
    _testSevice.GetMock<IRepository5>().Setup(fn => fn.GetNumber()).Returns(x); 
    
    //call public function
    _testSevice.Foo_1(a, b);
    
    //call private function
    _testSevice.InvokeMethod("Foo_2",param1,param2);

#Problem 1 : too many DI in our service

    private readonly IRepository1 repository1;
    private readonly IRepository2 repository2;
    private readonly IRepository3 repository3;
    private readonly IRepository4 repository4;
    private readonly IRepository5 repository5;

    public TestService(IRepository1 repository1,
        IRepository2 repository2,
        IRepository3 repository3,
        IRepository4 repository4,
        IRepository5 repository5
        )
    {
        this.repository1 = repository1;
        this.repository2 = repository2;
        this.repository3 = repository3;
        this.repository4 = repository4;
        this.repository5 = repository5;
    }

#Solution 1 : create dynamic mock DI

    private readonly ITestService _testSevice;
    public TestService_test()
    {
        _testSevice = DynaMock.NewInstance<TestService>();
    }

#Problem 2 : need to test private function

    private int Foo_2(int a, int b)
    {
        if (a == b)
        {
            var x = repository1.GetNumber();
            return x + a;
        }
        else
        {
            var x = repository5.GetNumber();
            return x + b;
        }
    }

#Solution 2 : create Invoke method

    [Fact]
    public void Check_aNotEquelb_ShouldReturn_bPlusx()
    {
        var a = 1;
        var b = 2;
        var x = 3;

        _testSevice.GetMock<IRepository5>().Setup(fn => fn.GetNumber()).Returns(x);
        var result = _testSevice.InvokeMethod("Foo_2", a, b);
        Assert.Equal(5, result);
    }