Add an integration test for aborting the completions on Escape

assets/js/autocomplete/__tests__/server-side-completions-aborting.spec.ts

@@ -0,0 +1,34 @@
+import { init } from './context';
+
+it('ignores the autocompletion results if Escape was pressed', async () => {
+  const ctx = await init();
+
+  await Promise.all([ctx.setInput('mar'), ctx.keyDown('Escape')]);
+
+  // The input must be empty because the user typed `mar` and pressed `Escape` right after that
+  ctx.expectUi().toMatchInlineSnapshot(`
+    {
+      "input": "mar<>",
+      "suggestions": [],
+    }
+  `);
+
+  // First request for the local autocomplete index.
+  expect(fetch).toHaveBeenCalledTimes(1);
+
+  await ctx.setInput('mar');
+
+  ctx.expectUi().toMatchInlineSnapshot(`
+    {
+      "input": "mar<>",
+      "suggestions": [
+        "marvelous → beautiful  30",
+        "mare  20",
+        "market  10",
+      ],
+    }
+  `);
+
+  // Second request for the server-side suggestions.
+  expect(fetch).toHaveBeenCalledTimes(2);
+});