feat(jest): jest added

[Celtian]

✍️ Describe your changes

None

🔗 Issue ticket number and link

None

✅ Checklist before requesting a review

• I have performed a self-review of my code.
• If it is a core feature, I have added thorough tests.
• I have checked that affected pages are responsive.
• I have checked that there are no z-index issues on affected pages.

[github-actions]

🧪 Unit tests

Caution

Coverage does not meet threshold
Branches coverage not met for global: expected >=80%, but got 40%

St.❔	Category	Percentage	Covered / Total
🟢	Statements	89.58% (-10.42% 🔻)	86/96
🔴	Branches	40% (-60% 🔻)	4/10
🟢	Functions	100%	4/4
🟢	Lines	89.58% (-10.42% 🔻)	86/96

Show new covered files 🐣

St.❔	File	Statements	Branches	Functions	Lines
🟢	ngx-update-app.directive.ts	100%	50%	100%	100%
🟢	ngx-update-app.interface.ts	100%	100%	100%	100%
🟢	ngx-update-app.provider.ts	100%	100%	100%	100%
🟡	ngx-update-app.service.ts	79.17%	28.57%	100%	79.17%

Test suite run success

4 tests passing in 3 suites.

Report generated by 🧪jest coverage report action from 719d7c3