[ui] Show "Scaled Down" as a valid job status when task groups' counts are set to zero (#23829)

* Scaled Down as a status

* Scaled Down as a steady-state job panel status as well

* Test for badge status and changelog

.changelog/23829.txt

@@ -0,0 +1,3 @@
+```release-note:improvement
+ui: Badge added for Scaled Down jobs
+```

ui/app/components/job-status/panel/steady.js

@@ -205,7 +205,7 @@ export default class JobStatusPanelSteadyComponent extends Component {
 
   /**
    * @typedef {Object} CurrentStatus
-   * @property {"Healthy"|"Failed"|"Degraded"|"Recovering"|"Complete"|"Running"|"Stopped"} label - The current status of the job
+   * @property {"Healthy"|"Failed"|"Degraded"|"Recovering"|"Complete"|"Running"|"Stopped"|"Scaled Down"} label - The current status of the job
    * @property {"highlight"|"success"|"warning"|"critical"|"neutral"} state -
    */
 
@@ -224,6 +224,13 @@ export default class JobStatusPanelSteadyComponent extends Component {
       };
     }
 
+    if (this.totalAllocs === 0) {
+      return {
+        label: 'Scaled Down',
+        state: 'neutral',
+      };
+    }
+
     if (this.job.type === 'batch' || this.job.type === 'sysbatch') {
       // If all the allocs are complete, the job is Complete
       const completeAllocs = this.allocBlocks.complete?.healthy?.nonCanary;

ui/app/models/job.js

@@ -90,7 +90,7 @@ export default class Job extends Model {
 
   /**
    * @typedef {Object} CurrentStatus
-   * @property {"Healthy"|"Failed"|"Deploying"|"Degraded"|"Recovering"|"Complete"|"Running"|"Removed"|"Stopped"} label - The current status of the job
+   * @property {"Healthy"|"Failed"|"Deploying"|"Degraded"|"Recovering"|"Complete"|"Running"|"Removed"|"Stopped"|"Scaled Down"} label - The current status of the job
    * @property {"highlight"|"success"|"warning"|"critical"|"neutral"} state -
    */
 
@@ -226,6 +226,7 @@ export default class Job extends Model {
    * - Failed: All allocations are failed, lost, or unplaced
    * - Removed: The job appeared in our initial query, but has since been garbage collected
    * - Stopped: The job has been manually stopped (and not purged or yet garbage collected) by a user
+   * - Scaled Down: The job is intentionally scaled down to 0 desired allocations (all task groups have count=0)
    * @returns {CurrentStatus}
    */
   /**
@@ -248,6 +249,12 @@ export default class Job extends Model {
       };
     }
 
+    // If the job is scaled down to 0 desired allocations, we shouldn't call it "failed";
+    // we should indicate that it is deliberately set to not have any running parts.
+    if (totalAllocs === 0) {
+      return { label: 'Scaled Down', state: 'neutral' };
+    }
+
     // If the job was requested initially, but a subsequent request for it was
     // not found, we can remove links to it but maintain its presence in the list
     // until the user specifies they want a refresh

ui/mirage/factories/job.js

@@ -250,7 +250,7 @@ export default Factory.extend({
       groupProps.taskCount = job.groupTaskCount;
     }
 
-    if (job.groupAllocCount) {
+    if (job.groupAllocCount !== undefined) {
       groupProps.count = job.groupAllocCount;
     }
 

ui/tests/acceptance/jobs-list-test.js

@@ -700,6 +700,13 @@ module('Acceptance | jobs list', function (hooks) {
       activeDeployment: true,
     });
 
+    server.create('job', {
+      ...defaultJobParams,
+      id: 'scaled-down-job',
+      groupAllocCount: 0,
+      status: 'dead',
+    });
+
     await JobsList.visit();
 
     assert
@@ -732,6 +739,9 @@ module('Acceptance | jobs list', function (hooks) {
     assert
       .dom('[data-test-job-row="deploying-job"] [data-test-job-status]')
       .hasText('Deploying', 'Deploying job is deploying');
+    assert
+      .dom('[data-test-job-row="scaled-down-job"] [data-test-job-status]')
+      .hasText('Scaled Down', 'Scaled down job is scaled down');
 
     await percySnapshot(assert);
   });