dotnet-installer/test/dotnet.Tests/CommandLineApplicationTests.cs

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using System;
using FluentAssertions;
using Microsoft.DotNet.Cli.CommandLine;
using Xunit;
namespace Microsoft.DotNet.Tests
{
public class CommandLineApplicationTests
{
[Fact]
public void WhenAnOptionRequiresASingleValueThatIsNotSuppliedItThrowsCommandParsingException()
{
var app = new CommandLineApplication();
app.Option("-v|--verbosity", "be verbose", CommandOptionType.SingleValue);
Action execute = () => app.Execute("-v");
execute.ShouldThrow<CommandParsingException>()
.Which
.Message
.Should()
.Be("Required value for option '-v' was not provided.");
}
}
}