test(integration): add DB integration tests for students, promotions, roles, modules

Covers full CRUD for each resource via testDb:
- promotions: list, create, get by id, not found, update, delete
- students: list, filter by promo, create, get, not found, update, delete
- roles: list, create, get with permissions, update+reset perms, delete
- modules: list, create, duplicate id rejection, get, not found, update, delete

27 integration tests passing in CI (act + Gitea Actions).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/integration/students_test.ts

@@ -0,0 +1,163 @@
+import { assertEquals, assertExists } from "@std/assert";
+import {
+  seedPromotions,
+  seedStudents,
+  testDb,
+  truncateAll,
+} from "../helpers/db_integration.ts";
+import { students } from "$root/databases/schema.ts";
+import { eq } from "npm:drizzle-orm@0.45.2";
+
+Deno.test({
+  name: "integration: GET /students - returns all students",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "PEIP1-2024" }]);
+    await seedStudents([
+      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
+      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
+      { nom: "Durand", prenom: "Claire", idPromo: "PEIP1-2024" },
+    ]);
+
+    const rows = await testDb.select().from(students);
+    assertEquals(rows.length, 3);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration: GET /students?idPromo - filters by promotion",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([
+      { id: "PEIP1-2024" },
+      { id: "PEIP2-2024" },
+    ]);
+    await seedStudents([
+      { nom: "Dupont", prenom: "Jean", idPromo: "PEIP1-2024" },
+      { nom: "Martin", prenom: "Alice", idPromo: "PEIP1-2024" },
+      { nom: "Durand", prenom: "Claire", idPromo: "PEIP2-2024" },
+    ]);
+
+    const rows = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.idPromo, "PEIP1-2024"));
+
+    assertEquals(rows.length, 2);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration: POST /students - creates a student",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+
+    const [created] = await testDb
+      .insert(students)
+      .values({ nom: "Leroy", prenom: "Paul", idPromo: "INFO3-2024" })
+      .returning();
+
+    assertExists(created);
+    assertExists(created.numEtud);
+    assertEquals(created.nom, "Leroy");
+    assertEquals(created.prenom, "Paul");
+    assertEquals(created.idPromo, "INFO3-2024");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration: GET /students/:numEtud - returns a specific student",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+    const [student] = await seedStudents([
+      { nom: "Bernard", prenom: "Lucie", idPromo: "INFO3-2024" },
+    ]);
+
+    const row = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.numEtud, student.numEtud))
+      .then((r) => r[0] ?? null);
+
+    assertExists(row);
+    assertEquals(row.nom, "Bernard");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration: GET /students/:numEtud - returns null when not found",
+  async fn() {
+    await truncateAll();
+
+    const row = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.numEtud, 999999))
+      .then((r) => r[0] ?? null);
+
+    assertEquals(row, null);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration: PUT /students/:numEtud - updates a student",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }, { id: "INFO4-2024" }]);
+    const [student] = await seedStudents([
+      { nom: "Petit", prenom: "Hugo", idPromo: "INFO3-2024" },
+    ]);
+
+    const [updated] = await testDb
+      .update(students)
+      .set({ nom: "Grand", prenom: "Hugo", idPromo: "INFO4-2024" })
+      .where(eq(students.numEtud, student.numEtud))
+      .returning();
+
+    assertExists(updated);
+    assertEquals(updated.nom, "Grand");
+    assertEquals(updated.idPromo, "INFO4-2024");
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});
+
+Deno.test({
+  name: "integration: DELETE /students/:numEtud - deletes a student",
+  async fn() {
+    await truncateAll();
+    await seedPromotions([{ id: "INFO3-2024" }]);
+    const [student] = await seedStudents([
+      { nom: "Thomas", prenom: "Eva", idPromo: "INFO3-2024" },
+    ]);
+
+    const [deleted] = await testDb
+      .delete(students)
+      .where(eq(students.numEtud, student.numEtud))
+      .returning();
+
+    assertExists(deleted);
+
+    const row = await testDb
+      .select()
+      .from(students)
+      .where(eq(students.numEtud, student.numEtud))
+      .then((r) => r[0] ?? null);
+
+    assertEquals(row, null);
+  },
+  sanitizeResources: false,
+  sanitizeOps: false,
+});