Use snapshot in bookmark widget test

products/jbrowse-web/src/tests/BookmarkWidget.test.tsx

@@ -43,8 +43,8 @@ test('using the click and drag rubberband', async () => {
   fireEvent.click(await findByText('Bookmark region'))
 
   // @ts-expect-error
-  const bookmarkWidget = session.widgets.get('GridBookmark')
-  expect(bookmarkWidget.bookmarks[0].assemblyName).toBe('volvox')
+  const { bookmarks } = session.widgets.get('GridBookmark')
+  expect(bookmarks).toMatchSnapshot()
 }, 40000)
 
 test('using the hotkey to bookmark the current region', async () => {
@@ -63,8 +63,7 @@ test('using the hotkey to bookmark the current region', async () => {
 
   // @ts-expect-error
   const { bookmarks } = session.widgets.get('GridBookmark')
-  expect(bookmarks[0].start).toBe(100)
-  expect(bookmarks[0].end).toBe(140)
+  expect(bookmarks).toMatchSnapshot()
 })
 
 test('using the menu button to bookmark the current region', async () => {
@@ -77,9 +76,7 @@ test('using the menu button to bookmark the current region', async () => {
 
   // @ts-expect-error
   const { bookmarks } = session.widgets.get('GridBookmark')
-  expect(bookmarks.length).toBe(1)
-  expect(bookmarks[0].start).toBe(100)
-  expect(bookmarks[0].end).toBe(140)
+  expect(bookmarks).toMatchSnapshot()
 }, 40000)
 
 test('using the embedded link in the widget data grid', async () => {

products/jbrowse-web/src/tests/__snapshots__/BookmarkWidget.test.tsx.snap

@@ -0,0 +1,40 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`using the click and drag rubberband 1`] = `
+[
+  {
+    "assemblyName": "volvox",
+    "end": 113,
+    "label": "",
+    "refName": "ctgA",
+    "reversed": false,
+    "start": 105,
+  },
+]
+`;
+
+exports[`using the hotkey to bookmark the current region 1`] = `
+[
+  {
+    "assemblyName": "volvox",
+    "end": 140,
+    "label": "",
+    "refName": "ctgA",
+    "reversed": false,
+    "start": 100,
+  },
+]
+`;
+
+exports[`using the menu button to bookmark the current region 1`] = `
+[
+  {
+    "assemblyName": "volvox",
+    "end": 140,
+    "label": "",
+    "refName": "ctgA",
+    "reversed": false,
+    "start": 100,
+  },
+]
+`;