Handle the job 404 error case in versions

ui/tests/acceptance/job-versions-test.js

@@ -28,3 +28,18 @@ test('each version mentions the version number, the stability, and the submitted
   assert.equal(versionRow.stability, version.stable.toString(), 'Stability');
   assert.equal(versionRow.submitTime, formattedSubmitTime, 'Submit time');
 });
+
+test('when the job for the definition is not found, an error message is shown, but the URL persists', function(assert) {
+  Versions.visit({ id: 'not-a-real-job' });
+
+  andThen(() => {
+    assert.equal(
+      server.pretender.handledRequests.findBy('status', 404).url,
+      '/v1/job/not-a-real-job',
+      'A request to the nonexistent job is made'
+    );
+    assert.equal(currentURL(), '/jobs/not-a-real-job/versions', 'The URL persists');
+    assert.ok(Versions.error.isPresent, 'Error message is shown');
+    assert.equal(Versions.error.title, 'Not Found', 'Error message is for 404');
+  });
+});

ui/tests/pages/jobs/job/definition.js

@@ -1,6 +1,7 @@
 import { create, isPresent, visitable, clickable, text } from 'ember-cli-page-object';
 
 import jobEditor from 'nomad-ui/tests/pages/components/job-editor';
+import error from 'nomad-ui/tests/pages/components/error';
 
 export default create({
   visit: visitable('/jobs/:id/definition'),
@@ -10,10 +11,5 @@ export default create({
 
   edit: clickable('[data-test-edit-job]'),
 
-  error: {
-    isPresent: isPresent('[data-test-error]'),
-    title: text('[data-test-error-title]'),
-    message: text('[data-test-error-message]'),
-    seekHelp: clickable('[data-test-error-message] a'),
-  },
+  error: error(),
 });

ui/tests/pages/jobs/job/task-group.js

@@ -10,6 +10,7 @@ import {
 } from 'ember-cli-page-object';
 
 import allocations from 'nomad-ui/tests/pages/components/allocations';
+import error from 'nomad-ui/tests/pages/components/error';
 
 export default create({
   pageSize: 10,
@@ -37,12 +38,7 @@ export default create({
 
   isEmpty: isPresent('[data-test-empty-allocations-list]'),
 
-  error: {
-    isPresent: isPresent('[data-test-error]'),
-    title: text('[data-test-error-title]'),
-    message: text('[data-test-error-message]'),
-    seekHelp: clickable('[data-test-error-message] a'),
-  },
+  error: error(),
 
   emptyState: {
     headline: text('[data-test-empty-allocations-list-headline]'),

ui/tests/pages/jobs/job/versions.js

@@ -1,5 +1,7 @@
 import { create, collection, text, visitable } from 'ember-cli-page-object';
 
+import error from 'nomad-ui/tests/pages/components/error';
+
 export default create({
   visit: visitable('/jobs/:id/versions'),
 
@@ -8,4 +10,6 @@ export default create({
     stability: text('[data-test-version-stability]'),
     submitTime: text('[data-test-version-submit-time]'),
   }),
+
+  error: error(),
 });