Can not cancel a Job, need UNIT TEST to solidify this Cancelling

Background: Often jobs needed to be cancelled. Getting error while cancelling a job!
Request URL:http://taskcatdev.azurewebsites.net/api/Job/cancel/579ed9bb85e54d24c4bacd4b
Request Method:POST
Status Code:500 Internal Server Error
Remote Address:104.214.29.203:80

Access-Control-Allow-Credentials:true
Access-Control-Allow-Origin:http://127.0.0.1:8080
Content-Length:2733
Content-Type:application/json
Date:Tue, 02 Aug 2016 13:09:52 GMT
Server:Microsoft-IIS/8.0
Set-Cookie:ARRAffinity=d5baaa4af13ed7a15d133cc9fb3175ad57c46ec6cfd3ea7a639bbc0f442a6612;Path=/;Domain=taskcatdev.azurewebsites.net
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Accept:application/json, text/plain, */*
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Accept-Language:en-US,en;q=0.8,bn;q=0.6
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Connection:keep-alive
Content-Length:0
DNT:1
Host:taskcatdev.azurewebsites.net
Origin:http://127.0.0.1:8080
Referer:http://127.0.0.1:8080/
User-Agent:Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.103 Safari/537.36

{
  "ClassName": "System.NullReferenceException",
  "Message": "Object reference not set to an instance of an object.",
  "Data": null,
  "InnerException": null,
  "HelpURL": null,
  "StackTraceString": "   at TaskCat.Lib.Job.JobRepository.<CancelJob>d__14.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at TaskCat.Controller.JobController.<CancelJob>d__12.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Threading.Tasks.TaskHelpersExtensions.<CastToObject>d__3`1.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ApiControllerActionInvoker.<InvokeActionAsyncCore>d__0.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ActionFilterResult.<ExecuteAsync>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Filters.AuthorizationFilterAttribute.<ExecuteAuthorizationFilterAsyncCore>d__2.MoveNext()\r\n--- End of stack trace from previous location where exception was thrown ---\r\n   at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task)\r\n   at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task)\r\n   at System.Web.Http.Controllers.ExceptionFilterResult.<ExecuteAsync>d__0.MoveNext()",
  "RemoteStackTraceString": null,
  "RemoteStackIndex": 0,
  "ExceptionMethod": "8\nMoveNext\nTaskCat, Version=0.1.3.54, Culture=neutral, PublicKeyToken=null\nTaskCat.Lib.Job.JobRepository+<CancelJob>d__14\nVoid MoveNext()",
  "HResult": -2147467261,
  "Source": "TaskCat",
  "WatsonBuckets": null
}
NerdCats / TaskCat

Can not cancel a Job, need UNIT TEST to solidify this Cancelling #88
