Set "cancelled" in state bag to true if cancelled request received

basic_runner.go

@@ -38,6 +38,7 @@ StepLoop:
 		// and just exit the loop now.
 		select {
 		case doneCh = <-b.cancelCh:
+			state["cancelled"] = true
 			break StepLoop
 		default:
 		}

basic_runner_test.go

@@ -97,4 +97,10 @@ func TestBasicRunner_Cancel(t *testing.T) {
 	if !reflect.DeepEqual(results, expected) {
 		t.Errorf("unexpected result: %#v", results)
 	}
+
+	// Test that it says it is cancelled
+	cancelled := data["cancelled"].(bool)
+	if !cancelled {
+		t.Errorf("not cancelled")
+	}
 }