What type of test checks if individual units of code work as expected?Integration testSystem testUnit testAcceptance test

Break Down the Problem

1. Identify the kinds of tests used in software development to verify functionality.
2. Distinguish between unit tests, integration tests, system tests, and acceptance tests.

Relevant Concepts

• Unit Test: Focuses on testing individual units of code (usually functions or methods) to ensure they work as intended.
• Integration Test: Checks how different modules or services work together.
• System Test: Validates the entire system's functionality and performance as a whole.
• Acceptance Test: Assesses whether the system meets business requirements and is acceptable to stakeholders.

Analysis and Detail

• The question asks specifically about checking if "individual units of code" work as expected.
• Given the definitions provided, the type of testing that corresponds to this is Unit Testing. It isolates each unit in a software application and tests it for correct behavior.

Verify and Summarize

• Unit Testing is distinct from the other testing types listed, as it exclusively focuses on individual components of code, ensuring they function properly in isolation.

Final Answer

The correct answer is Unit test.