add additional/missing tests

test/cases/getDaysSavedFormatted.ts

@@ -0,0 +1,11 @@
+import assert from "assert";
+import { client } from "../utils/httpClient";
+
+const endpoint = "/api/getDaysSavedFormatted";
+
+describe("getDaysSavedFormatted", () => {
+    it("can get days saved", async () => {
+        const result = await client({ url: endpoint });
+        assert.ok(result.data.daysSaved >= 0);
+    });
+});