NullPointerException in EmailServiceImplTest.sendNotificationByEmail

[LazarenkoDmytro]

The test EmailServiceImplTest.sendNotificationByEmail fails with a NullPointerException when calling user.getLanguage().getCode() in the sendNotificationByEmail method of EmailServiceImpl.

Cause

The issue occurs because the User object created in the test does not have a Language specified. As a result, user.getLanguage() returns null, leading to the exception.

Error Stack Trace

java.lang.NullPointerException
	at greencity.service.EmailServiceImpl.sendNotificationByEmail(EmailServiceImpl.java:339)
	at greencity.service.EmailServiceImplTest.sendNotificationByEmail(EmailServiceImplTest.java:283)
	...

Steps to Reproduce

1. Run the sendNotificationByEmail test in EmailServiceImplTest.
2. Observe the NullPointerException in the test output.

Suggested Fix

Update the test sendNotificationByEmail to include a Language object in the User builder. Replace:

User user = User.builder().build();

with:

User user = User.builder().language(new Language()).build();

This ensures that the Language object is not null and prevents the NullPointerException.

Additional Information

• Class: EmailServiceImpl
• Method: sendNotificationByEmail
• Test Class: EmailServiceImplTest