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Path Coverage Testing

What does Path Coverage Testing mean?

Path coverage testing is a specific kind of methodical, sequential testing in which each individual line of code is assessed.

As a type of software testing, path coverage testing is in the category of technical test methods, rather than being part of an overarching strategy or "philosophy" of code. It is labor-intensive and is often reserved for specific vital sections of code.

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Techopedia explains Path Coverage Testing

The way that path coverage testing works is that the testers must look at each individual line of code that plays a role in a module and, for complete coverage, the testers must look at each possible scenario, so that all lines of code are covered.

In a very basic example, consider a code function that takes in a variable "x" and returns one of two results: if x is greater than 5, the program will return the result "A" and if x is less than or equal to 5, the program will return the result "B."

The code for the program would look something like this:

    input x
    if x > 5 then
    return A
    else return B

In order for path coverage testing to effectively "cover all paths," the two test cases must be run, with x greater than 5 and x less than or equal to 5.

Obviously, this method becomes much more complicated with more complex modules of code. Experts generally consider path coverage testing to be a type of white box testing, which actually inspects the internal code of a program, rather just relying on external inputs and strategies that are considered black box testing, which do not consider internal code.

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SoftwareObject Oriented Programming (OOP)Software Testing

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