wait for svg to be on the screen.

for some effin reason, this test started to glitch on in the CI pipeline
today. hopefully, this change will set thing right again.

tests/integration/components/visualizer-program-year-objectives-test.js

@@ -1,7 +1,7 @@
 import { module, test } from 'qunit';
 import { setupRenderingTest } from 'ember-qunit';
 import { setupIntl } from 'ember-intl/test-support';
-import { render } from '@ember/test-helpers';
+import { render, waitFor } from '@ember/test-helpers';
 import { hbs } from 'ember-cli-htmlbars';
 import setupMirage from 'ember-cli-mirage/test-support/setup-mirage';
 
@@ -78,6 +78,9 @@ module('Integration | Component | visualizer-program-year-objectives', function
     this.set('programYear', programYearModel);
     await render(hbs`<VisualizerProgramYearObjectives @programYear={{this.programYear}} />`);
 
+    await waitFor('.loaded');
+    await waitFor('svg .links');
+    await waitFor('svg .nodes');
     assert.dom('svg').exists({ count: 1 });
     assert.dom('svg g.links').exists({ count: 1 });
     assert.dom('svg g.nodes').exists({ count: 1 });