Black Box Testing versus White Box Testing

Black box testing is a testing strategy based solely on  requirements and specifications. Black box testing requires no knowledge  of internal paths, structures, or implementation of the software being  tested.

Typical black-box test design techniques include:

• Decision table testing
• All-pairs testing
• Equivalence partitioning
• Boundary value analysis
• Cause–effect graph
• Error guessing
• State transition testing
• Use case testing
• User story testing
• Domain analysis
• Combining technique

White box testing is a testing strategy based on internal paths,  code structures, and implementation of the software being tested. White box testing generally requires detailed programming skills.

White-box test design techniques include the following code coverage criteria:

• Control flow testing
• Data flow testing
• Branch testing
• Statement coverage
• Decision coverage
• Modified condition/decision coverage
• Prime path testing
• Path testing