public async Task CanReadConfigurationValues()
{
// Given
string[] args = new string[] { };
Environment.SetEnvironmentVariable(nameof(CanReadConfigurationValues), "Foo");
IBootstrapper bootstrapper = App.Bootstrapper.CreateDefault(args);
TestLoggerProvider provider = new TestLoggerProvider();
bootstrapper.ConfigureServices(services => services.AddSingleton <ILoggerProvider>(provider));
string variable = null;
bootstrapper.ConfigureSettings(x => variable = x[nameof(CanReadConfigurationValues)]);
bootstrapper.AddPipeline("Foo");
// When
int exitCode = await bootstrapper.RunAsync();
// Then
exitCode.ShouldBe((int)ExitCode.Normal);
variable.ShouldBe("Foo");
}