public async Task OnTurn_Init()
{
// Arrange
var turnContext = A.Fake <ITurnContext>();
var activity = new Activity()
{
ActivityType = ActivityType.Message, Text = "/init", ChatId = 15
};
A.CallTo(() => turnContext.Activity).Returns(activity);
A.CallTo(() => turnContext.CurrentDialog).Returns(null);
var initDialog = A.Fake <IDialog>();
A.CallTo(() => initDialog.Command).Returns("/init");
_target.AddDialog(initDialog);
// Act
await _target.OnTurn(turnContext);
// Assert
A.CallTo(() => turnContext.Begin(initDialog)).MustHaveHappened();
A.CallTo(() => turnContext.Continue()).MustHaveHappened();
}