add mock tests - Kaspar Bergert

[miiksnii]

--------------------------|---------|----------|---------|---------|-------------------

File	% Stmts	% Branch	% Funcs	% Lines	Uncovered Line #s
All files	100	100	100	100
User-Register	100	100	100	100
app.js	100	100	100	100
User-Register/validation	100	100	100	100
validateEmail.js	100	100	100	100
validatePassword.js	100	100	100	100
validateUsername.js	100	100	100	100
--------------------------	---------	----------	---------	---------	-------------------

Test Suites: 5 passed, 5 total
Tests: 39 passed, 39 total
Snapshots: 0 total
Time: 19.474 s, estimated 20 s

testid on jooksutatud kooli arvutil, seega on testid ka aeglased.

[github-actions]

API & Mocked Tests and Coverage

Purpose: Validate README requirements for regular tests, mocked email tests, coverage, and runtime comparison.
Status: ❌ FAIL
Regular tests (app.test.js): ✅ PASS (23497 ms)
Mocked tests (app.mock.test.js): ✅ PASS (1306 ms)
Coverage gate (both runs at 100%): ❌ FAIL
Runtime gate (regular > mocked): ✅ PASS
Regular coverage: lines=100%, statements=100%, functions=100%, branches=100%
Mocked coverage: lines=82.85%, statements=81.57%, functions=80%, branches=81.81%
Run details: https://github.com/tanjaq/User-Register/actions/runs/23493229726
PR checks: https://github.com/tanjaq/User-Register/pull/28/checks
Where to look: Inspect the Run regular tests, Run mocked email tests, Enforce 100% coverage, and Enforce runtime rule logs in this run.