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Black Box Testing vs. White Box Testing vs. Grey Box Testing
| Index | Black Box Testing | White Box Testing | Grey Box Testing |
|---|---|---|---|
| 1 | Knowledge of internal working structure (Code) is not required for this type of testing. Only GUI (Graphical User Interface) is required for test cases. | Knowledge of internal working structure (Coding of software) is necessarily required for this type of testing. | Partially Knowledge of the internal working structure is required. |
| 2 | Black Box Testing is also known as functional testing, data-driven testing, and closed box testing. | White Box Testing is also known as structural testing, clear box testing, code-based testing, and transparent testing. | Grey Box Testing is also known as translucent testing as the tester has limited knowledge of coding. |
| 3 | The approach towards testing includes trial techniques and error guessing method because tester does not need knowledge of internal coding of the software. | White Box Testing is proceeded by verifying the system boundaries and data domains inherent in the software as there is no lack of internal coding knowledge. | If the tester has knowledge of coding, then it is proceeded by validating data domains and internal system boundaries of the software. |
| 4 | The testing space of tables for inputs (inputs to be used for creating test cases) is pretty huge and largest among all testing spaces. | The testing space of tables for inputs (inputs to be used for creating test cases) is less as compared to Black Box testing. | The testing space of tables for inputs (inputs to be used for creating test cases) is smaller than Black Box and White Box testing. |
| 5 | It is very difficult to discover hidden errors of the software because errors can be due to internal working which is unknown for Black Box testing. | It is simple to discover hidden errors because it can be due to internal working which is deeply explored in White Box testing. | Difficult to discover the hidden error. Might be found in user level testing. |
| 6 | It is not considered for algorithm testing. | It is well suitable and recommended for algorithm testing. | It is not considered for algorithm testing. |
| 7 | Time consumption in Black Box testing depends upon the availability of the functional specifications. | White Box testing takes a long time to design test cases due to lengthy code. | Test cases designing can be done in a short time period. |
| 8 | Tester, developer and the end user can be the part of testing. | Only tester and developer can be a part of testing; the end user can not involve. | Tester, developer and the end user can be the part of testing. |
| 9 | It is the least time-consuming process among all the testing processes. | The entire testing process is the most time consuming among all the testing processes. | less time consuming than White Box testing. |
| 10 | Resilience and security against viral attacks are covered under Black Box testing. | Resilience and security against viral attacks are not covered under White Box testing. | Resilience and security against viral attacks are not covered under Grey Box testing. |
| 11 | The base of this testing is external expectations internal behavior is unknown. | The base of this testing is coding which is responsible for internal working. | Testing based on high-level database diagrams and dataflow diagrams. |
| 12 | It is less exhaustive than White Box and Grey Box testing methods. | It is most exhaustive between Black Box and Grey Box testing methods. | Partly exhaustive; depends upon the type of test cases are coding based or GUI based. |