All About Path Testing

Path testing is one of the first methods we use to make sure that every path through a program has been executed. But this test does not mean it can detect bugs in a program. Bugs often arise when programmers forgot to include processes in making codes to safeguard a program from bugs.

Similarly, the path testing procedure is like a walk-through and you have to choose a particular path in the program. Then inputs and results are written down and noted. Errors and faults encountered during the procedure must be written down. Its testing method is done based on algorithms and not on specifications.


Independent (basis) paths – this is a path through a decision to decision (DD) path. This particular paths cannot go through reproduction from any methods.

Decision to Decision (DD) path – the control flow graph (CFG) may undergo breaking down into different Decision to Decision paths. Conversion to individual nodes comes next.

Control Flow Graph (CFG) – the codes are represented by nodes, edges and regions. In this technique, the program will go through conversion into flow graphs. The control flow graph describes how the control flows through the software application.


In path testing it is always assumed that the data is accessed and defined properly. Specifications are also accurate.

Similarly, there is always this assumption that defects in the system do not exist. However, if there are indeed defects, it is just those defects which affect control flow.


Testing is being done on software products and applications to ensure that faults and defects are detected. Once these faults and defects are detected, they are then fixed.

By faults and defects, it also mean or include bugs. These tests see to it that bugs are properly identified and fixed. Finding and fixing as many faults as possible will make a particular software work to its maximum capacity.

In addition, when the products are released in the market, its users are assured of high-quality and error-free products.

This is also true with path testing. It is a structural method involving the use of the source code of a program to try to find every possible paths which can be executed.


From a testing standpoint, there are coverages which need to be put into consideration:

  • Link Coverage: this is achieved when the identified paths have a test that goes through every line or link in a graph.
  • Loop Coverage: in loop coverage, identified paths have tests that go through the interaction of sub-paths within a loop.
  • Node Coverage: To achieve Node Coverage, one should identify paths which go through every node in the graph.


Web developers are always there to provide us with software applications which are helpful to us in more ways than one. Imagine the hard work and dedication these people go through just to provide us with applications and programs which we can enjoy.

The social media applications which we use to get in touch with family and friends in various parts of the world. For instance, the mobile and desktop games we often play to entertain us. All these are products of web developers’ intelligence, creativity, dedication and hard work.

Before they deliver these applications to us, these software applications pass through various tests. These tests also identify and detect faults, errors and bugs. As a result, fixing occurs. Once they past the tests, that is the time they are ready for introducing to the market.

In conclusion, understanding the process these software applications go through before they reach its users will help us appreciate them more. Also, let us make sure that we use them properly, in ways which can help and not harm other people.

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