[VIPEROMCT-16] Creates a closure for telemetryObject so that requests can resolve correctly even if the telemetryObject is destroyed (#3210)

Co-authored-by: Deep Tailor <deep.j.tailor@nasa.gov>

src/plugins/condition/criterion/AllTelemetryCriterion.js

@@ -127,7 +127,7 @@ export default class AllTelemetryCriterion extends TelemetryCriterion {
 
         if (validatedData) {
             if (this.isStalenessCheck()) {
-                if (this.stalenessSubscription[validatedData.id]) {
+                if (this.stalenessSubscription && this.stalenessSubscription[validatedData.id]) {
                     this.stalenessSubscription[validatedData.id].update(validatedData);
                 }
                 this.telemetryDataCache[validatedData.id] = false;

src/plugins/condition/criterion/TelemetryCriterion.js

@@ -142,12 +142,14 @@ export default class TelemetryCriterion extends EventEmitter {
             };
         }
 
+        let telemetryObject = this.telemetryObject;
+
         return this.openmct.telemetry.request(
             this.telemetryObject,
             options
         ).then(results => {
             const latestDatum = results.length ? results[results.length - 1] : {};
-            const normalizedDatum = this.createNormalizedDatum(latestDatum, this.telemetryObject);
+            const normalizedDatum = this.createNormalizedDatum(latestDatum, telemetryObject);
 
             return {
                 id: this.id,

src/plugins/condition/criterion/TelemetryCriterionSpec.js

@@ -21,12 +21,14 @@
  *****************************************************************************/
 
 import TelemetryCriterion from "./TelemetryCriterion";
+import { getMockTelemetry } from "utils/testing";
 
 let openmct = {},
     mockListener,
     testCriterionDefinition,
     testTelemetryObject,
-    telemetryCriterion;
+    telemetryCriterion,
+    mockTelemetry = getMockTelemetry();
 
 describe("The telemetry criterion", function () {
 
@@ -60,7 +62,7 @@ describe("The telemetry criterion", function () {
         };
         openmct.objects = jasmine.createSpyObj('objects', ['get', 'makeKeyString']);
         openmct.objects.makeKeyString.and.returnValue(testTelemetryObject.identifier.key);
-        openmct.telemetry = jasmine.createSpyObj('telemetry', ['isTelemetryObject', "subscribe", "getMetadata", "getValueFormatter"]);
+        openmct.telemetry = jasmine.createSpyObj('telemetry', ['isTelemetryObject', "subscribe", "getMetadata", "getValueFormatter", "request"]);
         openmct.telemetry.isTelemetryObject.and.returnValue(true);
         openmct.telemetry.subscribe.and.returnValue(function () {});
         openmct.telemetry.getValueFormatter.and.returnValue({
@@ -109,4 +111,30 @@ describe("The telemetry criterion", function () {
         });
         expect(telemetryCriterion.result).toBeTrue();
     });
+
+    describe('the LAD request', () => {
+        beforeEach(async () => {
+            let telemetryRequestResolve;
+            let telemetryRequestPromise = new Promise((resolve) => {
+                telemetryRequestResolve = resolve;
+            });
+            openmct.telemetry.request.and.callFake(() => {
+                setTimeout(() => {
+                    telemetryRequestResolve(mockTelemetry);
+                }, 100);
+                return telemetryRequestPromise;
+            });
+        });
+
+        it("returns results for slow LAD requests", async function () {
+            const criteriaRequest = telemetryCriterion.requestLAD();
+            telemetryCriterion.destroy();
+            expect(telemetryCriterion.telemetryObject).toBeUndefined();
+            setTimeout(() => {
+                criteriaRequest.then((result) => {
+                    expect(result).toBeDefined();
+                });
+            }, 300);
+        });
+    });
 });