add 4xx tests

test/cases/getDaysSavedFormatted.ts

@@ -1,5 +1,7 @@
 import assert from "assert";
 import { client } from "../utils/httpClient";
+import sinon from "sinon";
+import { db } from "../../src/databases/databases";
 
 const endpoint = "/api/getDaysSavedFormatted";
 
@@ -8,4 +10,18 @@ describe("getDaysSavedFormatted", () => {
         const result = await client({ url: endpoint });
         assert.ok(result.data.daysSaved >= 0);
     });
+
+    it("returns 0 days saved if no segments", async () => {
+        const stub = sinon.stub(db, "prepare").resolves(undefined);
+        const result = await client({ url: endpoint });
+        assert.ok(result.data.daysSaved >= 0);
+        stub.restore();
+    });
+
+    it("returns days saved to 2 fixed points", async () => {
+        const stub = sinon.stub(db, "prepare").resolves({ daysSaved: 1.23456789 });
+        const result = await client({ url: endpoint });
+        assert.strictEqual(result.data.daysSaved, "1.23");
+        stub.restore();
+    });
 });