How do I test ASP.NET Core controllers effectively?

How do I test ASP.NET Core controllers effectively?

To test ASP.NET Core controllers, you can use the built-in testing framework along with tools like xUnit and Moq.

Can you give me an example of a unit test for a controller?

Sure! Here's a simple example using xUnit:

[Fact]
public void Get_ReturnsOkResult_WhenCalled() {
    // Arrange
    var controller = new MyController();

    // Act
    var result = controller.Get();

    // Assert
    Assert.IsType<OkResult>(result);
}

What about testing for invalid inputs?

For invalid inputs, you can use the ModelState property to check if the model validation fails and return appropriate responses.

Are there any best practices for testing controllers?

Yes! Some best practices include keeping tests isolated, using mocks for dependencies, and testing both positive and negative scenarios.