There are generally four recognized levels of tests: unit/component testing, integration testing, system testing, and acceptance testing.

There are only four level of testing 1. Unit Testing 2. System Testing 3. Integration Testing 4. UAT Testing

Levels of testing include different methodologies that can be used while conducting software testing. The main levels of software testing are:Functional Testing Non-functional Testing

unit testing, integration testing, system testing, and acceptance testing.

There are many testing levels and depends on model used for software engineering. In general, there are below levels of testing - Unit Testing - Usually done by developers where they test small piece of code Module/Component Testing - Where we test a particular module of project Integration Testing - Where we integrate all different module and test them together to make sure nothing is broken after integration System Testing - Where we test system compatibility Acceptance testing - To ensure product is working as per requirement specification