Testing Piped Input

PipedInput is easily tested using the TestConsole or either of the RunInMem or BDD Verify methods which use the TestConsole.

Simply supply an IEnumerable to the optional PipedInput parameter or property.

RunInMem

public class PipedInputTests
{
    [Test]
    public void PipedInput_Should_UnionWithUserSuppliedValues()
    {
        var result = new AppRunner<App>()
            .AppendPipedInputToOperandList()
            .RunInMem("List aaa bbb", pipedInput: new[] { "ccc", "ddd" });

        result.ExitCode.Should().Be(0);
        result.OutputShouldBe(@"aaa
bbb
ccc
ddd
");
    }
}

BDD Verify

public class PipedInputTests
{
    [Test]
    public void PipedInput_Should_UnionWithUserSuppliedValues()
    {
        new AppRunner<App>()
            .AppendPipedInputToOperandList()
            .Verify(new Scenario
            {
                When = 
                {
                    Args = "List aaa bbb",
                    PipedInput = new[] { "ccc", "ddd" } 
                },
                Then =
                {
                    Output = @"aaa
bbb
ccc
ddd
"
                }
            });
    }
}

TestConsole

public class PipedInputTests
{
    [Test]
    public void PipedInput_Should_UnionWithUserSuppliedValues()
    {
        var testConsole = new TestConsole(pipedInput: new[] { "ccc", "ddd" });
        var appRunner = new AppRunner<App>()
            .Configure(c => c.Console = testConsole);

        // remaining test code
    }
}