Test updates

frontend/__test_support__/not_stub.ts

@@ -1 +0,0 @@
-module.exports = {};

frontend/__tests__/sequence_meta_test.ts

@@ -0,0 +1,8 @@
+import { safeEveryPointType } from "../sequences/locals_list/location_form_list";
+
+describe("safeEveryPointType", () => {
+  it("crashes on unknown values", () => {
+    const boom = () => safeEveryPointType("nope");
+    expect(boom).toThrowError("'nope' is not of type EveryPointType");
+  });
+});