protected virtual TMyClass GetMockMyClass<TMyClass>(Action<Mock<TMyClass>> setup = null) where TMyClass : class
    {
        var mockMyClass = new Mock<TMyClass>();
        setup?.Invoke(mockMyClass);
        return mockMyClass.Object;
    }
    
    

I need to test this method:

    public async Task<FirstDto> FirstAsync(string argument)
    {
        var result = await this.InternalMethod(argument);

        await this.CreateAsync(new Second()
        {
            // I haven't Id!!!!
            Error = result.error,
            Argument = argument,
            State = result.Success,
        });

        return result;
    }

Here we go!

var myMockMyClass = GetMockMyClass<IMyClass<SecondDto, Second>>(mock =>
{
    mock.Setup(x => x.CreateAsync(It.IsAny<Second>()))
        .ReturnsAsync(this.mapper.Map<SecondDto>(

                    /* Set manually the Id (or other attribute) in test SCOPE? */

                    ));
});

await myMockMyClass.FirstAsync("someValue");

// now I need to check that a new register or Second object class...

var entityWithError = await myRepo
                    .Search<Second>(x => !string.IsNullOrEmpty(x.Error))
                    .FirstOrDefaultAsync();

In my mock I need to set previously the value of the Id in order to prevent System.NotSupportedException : The property 'Second.Id' does not have a value set and no value generator is available for properties of type 'decimal'. Either set a value for the property before adding the entity or configure a value generator for properties of type 'decimal' in 'OnModelCreating'.

How set the ID in the mock?

CodePudding user response：