fix(segmentation): Added support for unhydrated RTSTRUCT in MPR. Added support for overlaying segmentations over display sets the segmentations do not reference. (#5168)

tests/MPRThenRTOverlayNoHydration.spec.ts

@@ -0,0 +1,41 @@
+import { test } from 'playwright-test-coverage';
+import { visitStudy, checkForScreenshot, screenShotPaths } from './utils';
+
+test.beforeEach(async ({ page }) => {
+  const studyInstanceUID = '1.3.6.1.4.1.5962.99.1.2968617883.1314880426.1493322302363.3.0';
+  const mode = 'viewer';
+  await visitStudy(page, studyInstanceUID, mode, 2000);
+});
+
+test('should launch MPR with unhydrated RTSTRUCT chosen from the data overlay menu', async ({
+  page,
+}) => {
+  await page.getByTestId('side-panel-header-right').click();
+
+  await page.getByTestId('Layout').click();
+  await page.getByTestId('MPR').click();
+
+  await page.waitForTimeout(5000);
+  await checkForScreenshot(
+    page,
+    page,
+    screenShotPaths.mprThenRTOverlayNoHydration.mprPreRTOverlayNoHydration
+  );
+
+  // Hover over the middle/sagittal viewport so that the data overlay menu is available.
+  await page.locator('css=div[data-viewportid="mpr-sagittal"]').hover();
+  await page.getByTestId('dataOverlayMenu-mpr-sagittal-btn').click();
+  await page.getByTestId('AddSegmentationDataOverlay-mpr-sagittal').click();
+  await page.getByText('SELECT A SEGMENTATION').click();
+  await page.getByTestId('ARIA RadOnc Structure Sets').click();
+
+  // Hide the overlay menu.
+  await page.getByTestId('dataOverlayMenu-mpr-sagittal-btn').click();
+
+  await page.waitForTimeout(5000);
+  await checkForScreenshot(
+    page,
+    page,
+    screenShotPaths.mprThenRTOverlayNoHydration.mprPostRTOverlayNoHydration
+  );
+});