style: format api mock return type and test imports/JSON body

tests/unit/example_test.ts

@@ -1,16 +1,12 @@
 import { assertEquals, assertExists } from "@std/assert";
-import {
-  getFetchCalls,
-  mockFetch,
-  restoreFetch,
-} from "../helpers/api_mock.ts";
+import { getFetchCalls, mockFetch, restoreFetch } from "../helpers/api_mock.ts";
 import { createMockDb } from "../helpers/db_mock.ts";
 import {
-  type Student,
   ERROR_CONFLICT,
   ERROR_NOT_FOUND,
   modules,
   notes,
+  type Student,
   students,
 } from "../helpers/fixtures.ts";
 import { cleanupDOM, setupDOM } from "../helpers/render.ts";
@@ -116,7 +112,11 @@ Deno.test("mockFetch - 409 conflict", async () => {
   try {
     const res = await fetch("http://localhost/api/enseignements", {
       method: "POST",
-      body: JSON.stringify({ idProf: 1, idModule: "JIN702C", idPromo: "4AFISE25/26" }),
+      body: JSON.stringify({
+        idProf: 1,
+        idModule: "JIN702C",
+        idPromo: "4AFISE25/26",
+      }),
     });
     assertEquals(res.status, 409);
   } finally {