added tests for expenditures endpoint

Author: Bhuvan Hospet

apps/backend/lambdas/projects/test/projects.e2e.test.ts

@@ -27,7 +27,7 @@ describe('POST /projects (e2e)', () => {
   });
 
   test('201: creates project with all fields (e2e)', async () => {
-    const res = await fetch('http://localhost:3000/projects', {
+    const res = await fetch(`${base}`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
       body: JSON.stringify({
@@ -73,4 +73,34 @@ describe('POST /projects (e2e)', () => {
     });
     expect(res.status).toBe(201);
   });
+});
+
+describe('GET /projects/{id}/expenditures (e2e)', () => {
+  test("get expenditures for project 1 test 🌞", async () => {
+    let res = await fetch(`${base}/1/expenditures`);
+    expect(res.status).toBe(200);
+    let body = await res.json();
+    expect(Array.isArray(body)).toBe(true);
+  });
+
+  test("expenditures 404 test 🌞", async () => {
+    let res = await fetch(`${base}/99999/expenditures`);
+    expect(res.status).toBe(404);
+    let body = await res.json();
+    expect(body.message).toBe('Project not found');
+  });
+
+  test("expenditures ordered by spent_on test 🌞", async () => {
+    let res = await fetch(`${base}/1/expenditures`);
+    expect(res.status).toBe(200);
+    let body = await res.json();
+    
+    if (body.length > 1) {
+      for (let i = 0; i < body.length - 1; i++) {
+        let current = new Date(body[i].spent_on);
+        let next = new Date(body[i + 1].spent_on);
+        expect(current >= next).toBe(true);
+      }
+    }
+  });
 });

apps/backend/lambdas/projects/test/projects.unit.test.ts

@@ -86,3 +86,32 @@ test('400: currency empty or too long', async () => {
   const tooLong = await handler(event({ name: 'X', currency: 'ABCDEFGHIJK' })); // 11 chars
   expect(tooLong.statusCode).toBe(400);
 });
+
+
+function getExpendituresEvent(id: string) {
+  return {
+    rawPath: `/projects/${id}/expenditures`,
+    requestContext: { http: { method: 'GET' } },
+  } as any;
+}
+
+test('200: returns expenditures array', async () => {
+  const res = await handler(getExpendituresEvent('1'));
+  expect(res.statusCode).toBe(200);
+  const json = JSON.parse(res.body);
+  expect(Array.isArray(json)).toBe(true);
+});
+
+test('404: project not found', async () => {
+  const res = await handler(getExpendituresEvent('99999'));
+  expect(res.statusCode).toBe(404);
+  const json = JSON.parse(res.body);
+  expect(json.message).toBe('Project not found');
+});
+
+test('500: invalid id causes error', async () => {
+  const res = await handler(getExpendituresEvent('invalid'));
+  expect(res.statusCode).toBe(500);
+  const json = JSON.parse(res.body);
+  expect(json.message).toContain('Failed to fetch expenditures');
+});