Add Useful Unit Tests

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As part of the ongoing development of the Picture project, we need to add useful unit tests to ensure the reliability and functionality of the codebase. The goal is to thoroughly test the different components and functionalities of the Picture project to identify and fix any potential issues or bugs.

Tasks:

• Identify key components and functionalities of the Picture project that require unit testing
• Design and implement unit tests for the identified components and functionalities
• Execute the unit tests and analyze the results
• Fix any issues or bugs identified during the unit testing process
• Document the unit tests and their expected outcomes for future reference

Acceptance Criteria:

• The unit tests cover the major components and functionalities of the Picture project
• The unit tests are successfully executed without any failures or errors
• The unit tests effectively identify and help resolve any issues or bugs in the codebase