PolyMPR/tests/unit/example_test.ts

import { assertEquals, assertExists } from "@std/assert";
import { getFetchCalls, mockFetch, restoreFetch } from "../helpers/api_mock.ts";
import { createMockDb } from "../helpers/db_mock.ts";
import {
  ERROR_CONFLICT,
  ERROR_NOT_FOUND,
  modules,
  notes,
  type Student,
  students,
} from "../helpers/fixtures.ts";
import { cleanupDOM, setupDOM } from "../helpers/render.ts";

// --- Fixtures ---

Deno.test("fixtures - students match API shape", () => {
  assertEquals(students.length, 3);
  assertEquals(students[0].numEtud, 21212006);
  assertEquals(students[0].idPromo, "4AFISE25/26");
  assertEquals(typeof students[0].idPromo, "string");
});

Deno.test("fixtures - modules have string ids", () => {
  assertEquals(modules[0].id, "JIN702C");
  assertEquals(typeof modules[0].id, "string");
});

Deno.test("fixtures - notes use decimal values", () => {
  assertEquals(notes[0].note, 15.5);
  assertEquals(notes[0].idModule, "JIN702C");
});

// --- Mock fetch simple (GET 200) ---

Deno.test("mockFetch - GET returns mocked data", async () => {
  mockFetch({ "/students": students });
  try {
    const res = await fetch("http://localhost/api/students");
    assertEquals(res.status, 200);
    const data = await res.json();
    assertEquals(data.length, 3);
    assertEquals(data[0].nom, "Dupont");
  } finally {
    restoreFetch();
  }
});

Deno.test("mockFetch - returns 404 for unknown routes", async () => {
  mockFetch({});
  try {
    const res = await fetch("http://localhost/api/unknown");
    assertEquals(res.status, 404);
  } finally {
    restoreFetch();
  }
});

// --- Mock fetch avancé (méthodes + status codes) ---

Deno.test("mockFetch - POST 201 created", async () => {
  const newStudent = students[0];
  mockFetch({
    "/students": { method: "POST", status: 201, body: newStudent },
  });
  try {
    const res = await fetch("http://localhost/api/students", {
      method: "POST",
      headers: { "Content-Type": "application/json" },
      body: JSON.stringify(newStudent),
    });
    assertEquals(res.status, 201);
    const data = await res.json();
    assertEquals(data.numEtud, 21212006);
  } finally {
    restoreFetch();
  }
});

Deno.test("mockFetch - DELETE 204 no content", async () => {
  mockFetch({
    "/students/21212006": { method: "DELETE", status: 204 },
  });
  try {
    const res = await fetch("http://localhost/api/students/21212006", {
      method: "DELETE",
    });
    assertEquals(res.status, 204);
    assertEquals(res.body, null);
  } finally {
    restoreFetch();
  }
});

Deno.test("mockFetch - 404 error response", async () => {
  mockFetch({
    "/students/99999": { status: 404, body: ERROR_NOT_FOUND },
  });
  try {
    const res = await fetch("http://localhost/api/students/99999");
    assertEquals(res.status, 404);
    const data = await res.json();
    assertEquals(data.error, "Ressource introuvable");
  } finally {
    restoreFetch();
  }
});

Deno.test("mockFetch - 409 conflict", async () => {
  mockFetch({
    "/enseignements": { method: "POST", status: 409, body: ERROR_CONFLICT },
  });
  try {
    const res = await fetch("http://localhost/api/enseignements", {
      method: "POST",
      body: JSON.stringify({
        idProf: 1,
        idModule: "JIN702C",
        idPromo: "4AFISE25/26",
      }),
    });
    assertEquals(res.status, 409);
  } finally {
    restoreFetch();
  }
});

// --- getFetchCalls ---

Deno.test("getFetchCalls - tracks all intercepted calls", async () => {
  mockFetch({ "/notes": notes });
  try {
    await fetch("http://localhost/api/notes");
    await fetch("http://localhost/api/notes?numEtud=21212006");
    const calls = getFetchCalls();
    assertEquals(calls.length, 2);
    assertEquals(calls[0].method, "GET");
    assertEquals(calls[1].url, "http://localhost/api/notes?numEtud=21212006");
  } finally {
    restoreFetch();
  }
});

Deno.test("getFetchCalls - captures POST body", async () => {
  mockFetch({ "/notes": { method: "POST", status: 201, body: notes[0] } });
  try {
    await fetch("http://localhost/api/notes", {
      method: "POST",
      body: JSON.stringify(notes[0]),
    });
    const calls = getFetchCalls();
    assertEquals(calls.length, 1);
    assertEquals(calls[0].method, "POST");
    assertEquals((calls[0].body as { note: number }).note, 15.5);
  } finally {
    restoreFetch();
  }
});

// --- Mock DB ---

Deno.test("mockDb - getTable returns seeded rows", () => {
  const db = createMockDb({ tables: { students: [...students] } });
  assertEquals(db.getTable("students").length, 3);
});

Deno.test("mockDb - findOne by key", () => {
  const db = createMockDb({ tables: { students: [...students] } });
  const found = db.findOne<Student>("students", (r) => r.numEtud === 21212006);
  assertExists(found);
  assertEquals(found.nom, "Dupont");
});

Deno.test("mockDb - findOne returns undefined for missing", () => {
  const db = createMockDb({ tables: { students: [...students] } });
  const found = db.findOne<Student>("students", (r) => r.numEtud === 99999);
  assertEquals(found, undefined);
});

Deno.test("mockDb - insert adds a row", () => {
  const db = createMockDb({ tables: { students: [] } });
  const newStudent: Student = {
    numEtud: 21212099,
    nom: "Test",
    prenom: "User",
    idPromo: "4AFISE25/26",
  };
  db.insert("students", newStudent);
  assertEquals(db.getTable("students").length, 1);
  assertEquals(
    db.findOne<Student>("students", (r) => r.numEtud === 21212099)?.nom,
    "Test",
  );
});

Deno.test("mockDb - updateWhere modifies matching rows", () => {
  const db = createMockDb({ tables: { students: [...students] } });
  const updated = db.updateWhere<Student>(
    "students",
    (r) => r.numEtud === 21212006,
    { prenom: "Marie" },
  );
  assertEquals(updated, 1);
  assertEquals(
    db.findOne<Student>("students", (r) => r.numEtud === 21212006)?.prenom,
    "Marie",
  );
});

Deno.test("mockDb - deleteWhere removes matching rows", () => {
  const db = createMockDb({ tables: { students: [...students] } });
  const deleted = db.deleteWhere<Student>(
    "students",
    (r) => r.numEtud === 21212006,
  );
  assertEquals(deleted, 1);
  assertEquals(db.getTable("students").length, 2);
});

Deno.test("mockDb - findMany with filter", () => {
  const db = createMockDb({ tables: { students: [...students] } });
  const promo4 = db.findMany<Student>(
    "students",
    (r) => r.idPromo === "4AFISE25/26",
  );
  assertEquals(promo4.length, 2);
});

Deno.test("mockDb - reset clears all tables", () => {
  const db = createMockDb({
    tables: { students: [...students], notes: [...notes] },
  });
  db.reset();
  assertEquals(db.getTable("students").length, 0);
  assertEquals(db.getTable("notes").length, 0);
});

Deno.test("mockDb - isolated between instances", () => {
  const db1 = createMockDb({ tables: { students: [...students] } });
  const db2 = createMockDb({ tables: { students: [...students] } });
  db1.deleteWhere<Student>("students", () => true);
  assertEquals(db1.getTable("students").length, 0);
  assertEquals(db2.getTable("students").length, 3);
});

// --- happy-dom ---

Deno.test({
  name: "happy-dom - document is available after setup",
  sanitizeResources: false,
  sanitizeOps: false,
  fn() {
    setupDOM();
    try {
      const doc = globalThis.document;
      assertExists(doc);

      const div = doc.createElement("div");
      div.textContent = "hello";
      doc.body.appendChild(div);

      assertEquals(doc.body.textContent, "hello");
    } finally {
      cleanupDOM();
    }
  },
});