**Component testing** is that in which we test those test objects which are separately testable as a isolated unit without integrating with other components (e.g. modules, programs, objects, classes, etc.).

Testing of separate software component is known as **component testing**.

**Component Testing** is considered as the Module Testing, because we are testing each module or component differently and effectively. 

Suppose there is only an one project which consists of 10 components and we are testing each component differently and effectively than it is known as component testing.

A group of component is known as **module testing**.

**Component testing** is fulfilled by programmers on the code written by them and with the support of development environment, such as a unit test structure or debugging tool.

**Component Testing Example:**

For Example there are two web pages. In one of the web pages there are a many certain fields like username, address, mobile no. etc in which data has to be entered.  In the other (second) web page also there are certain fields which carry forward the data from the first page. Testing the functionality of these individual pages is called Component Testing.