What is the correct way to handle user input to IAnsiConsole when implementing unit tests?

[wbaldoumas]

I have some implementations that leverage the IAnsiConsole.Prompt , IAnsiConsole.Ask, and IAnsiConsole.Confirm methods.

How can I mock user input for these within the context of unit tests? Since these are extension methods, there isn't an easy way to mock the behavior here and I didn't see an obvious way of using TestConsole to achieve this, but may have missed something there.

[mapersson]

Take a look at TestConsoleInput, specifically "PushText" and "PushTextWithEnter".

I have used the following code in my unit test to mock user input:

var console = new TestConsole();
console.Input.PushTextWithEnter("mock user input");

[FrankRay78]

@wbaldoumas There are quite a few interactive unit tests located here, which you might find provide the pattern you are looking for: https://github.com/spectreconsole/spectre.console/tree/main/src/Tests/Spectre.Console.Tests/Unit/Prompts

Eg:

    [Fact]
    public void Should_Select_The_First_Leaf_Item()
    {
        // Given
        var console = new TestConsole();
        console.Profile.Capabilities.Interactive = true;
        console.Input.PushKey(ConsoleKey.Enter);

        // When
        var prompt = new SelectionPrompt<string>()
                .Title("Select one")
                .Mode(SelectionMode.Leaf)
                .AddChoiceGroup("Group one", "A", "B")
                .AddChoiceGroup("Group two", "C", "D");
        var selection = prompt.Show(console);

        // Then
        selection.ShouldBe("A");
    }

[wbaldoumas]

Thanks, both! I think this will work for what I need. 👍