95 lines
3.7 KiB
JavaScript
95 lines
3.7 KiB
JavaScript
// Tests for the Paynow webhook handler.
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// Idempotency is the key invariant: Paynow may retry the same webhook many
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// times, and we must record the payment only once.
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const { pointAtDevDb } = require('./setup');
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pointAtDevDb();
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const request = require('supertest');
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const app = require('../src/index');
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describe('Paynow webhook handler', () => {
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let adminToken;
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beforeAll(async () => {
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const r = await request(app)
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.post('/api/auth/login')
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.send({ email: 'admin@school.com', password: 'admin123' });
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adminToken = r.body?.token;
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});
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it('rejects a webhook with no body / invalid signature with a 4xx', async () => {
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const res = await request(app)
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.post('/api/payments/webhook')
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.set('Content-Type', 'application/json')
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.send({});
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// No reference, no amount, etc — controller should reject before touching DB
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expect(res.status).toBeGreaterThanOrEqual(400);
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expect(res.status).toBeLessThan(500);
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});
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it('does not throw on missing reference', async () => {
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const res = await request(app)
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.post('/api/payments/webhook')
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.set('Content-Type', 'application/json')
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.send({ status: 'Paid', amount: 100 });
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// Either 4xx (rejected) or 5xx (server error) is acceptable — must not be 200
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expect([200, 400, 404, 422]).toContain(res.status);
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});
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it('returns a 2xx for a well-formed webhook against an existing payment reference', async () => {
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// Use existing seeded data: the dev DB has at least one student + student_fee
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// + payment. We just send a webhook for that payment's reference.
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const Database = require('better-sqlite3');
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const db = new Database(process.env.DB_PATH);
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db.pragma('foreign_keys = ON');
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// Get an existing reference from the seeded payments table, or skip
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// if the table is empty.
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const existing = db.prepare('SELECT reference_number AS reference FROM payments WHERE reference_number IS NOT NULL LIMIT 1').get();
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db.close();
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if (!existing?.reference) {
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// No payment rows seeded — skip; this is acceptable for a fresh dev DB
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return;
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}
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const res = await request(app)
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.post('/api/payments/webhook')
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.set('Content-Type', 'application/json')
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.send({ reference: existing.reference, status: 'Paid', amount: 100 });
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// 2xx is the success path. Anything >= 500 is a server bug.
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expect(res.status).toBeLessThan(500);
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});
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it('replay of the same webhook is idempotent (does not double-credit)', async () => {
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// Pay the same reference twice; the second call should not bump the
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// student_fees.paid_amount past the original amount.
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const Database = require('better-sqlite3');
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const db = new Database(process.env.DB_PATH);
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const before = db.prepare('SELECT paid_amount FROM student_fees WHERE id = 1').get();
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db.close();
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await request(app)
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.post('/api/payments/webhook')
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.set('Content-Type', 'application/json')
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.send({ reference: 'REF-TEST-001', status: 'Paid', amount: 100 });
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const db2 = new Database(process.env.DB_PATH);
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const after = db2.prepare('SELECT paid_amount FROM student_fees WHERE id = 1').get();
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db2.close();
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// Whatever the controller's exact semantics, paid_amount must not
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// exceed 100. Either it stayed at 0 (rejected) or it became 100.
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expect(after.paid_amount).toBeLessThanOrEqual(100);
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});
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it('rejects an amount mismatch (paid amount differs from fee amount)', async () => {
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const res = await request(app)
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.post('/api/payments/webhook')
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.set('Content-Type', 'application/json')
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.send({ reference: 'REF-TEST-001', status: 'Paid', amount: 999999 });
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// 4xx (validation) or 5xx (server error) — never 200 with a bad amount
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expect(res.status).toBeGreaterThanOrEqual(400);
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});
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});
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