Question

I have a question which is described below:

What problems would arise for testing a Java class which counts number of words in a file?

The function’s signature is below:

public int wordCount(String filename)

Well, this is a junit testing question.
If you know the problem, what is the solution of that?

Answer 1

So your question is what to test for? If yes, I’d say you should check if the definition of “word” is implemented correctly (e.g. is “stack-overflow” one word or two), are new lines handled correctly, are numbers counted as words (e.g. difference between “8” and “eight”), are (groups of special) characters (e.g. a hyphen) counted correctly.

Additionally, you should test whether the method returns the expected value (or exception) if the file does not exist.

This should be a good starting point.