Checking for the presence of a specific function in a file using unit testing

I am curious if there is a possible way to utilize mocha and chai in order to test for the presence of a specific piece of code, such as a function like this:

myfunction(arg1) {
    ......
}

If the code has been implemented, then the test should return true.

Note: I understand that testing an entire piece of code might seem unconventional, but during training sessions, students tend to write a substantial amount of code. If something isn't functioning correctly, we need to review all of their steps to find the issue. To prevent this, I want to create a test that can identify certain portions of their code. Thus far, I have already developed other tests to verify the existence of arguments, array element length, etc.

Thank you in advance.

Answer №1

If you want to accomplish this using the chai library, there are several methods available.

In case the function being tested is within the global (window) namespace, you can utilize the following approach:

expect(myfunction).to.exist // ensures that the target exists and is not null or undefined`

Alternatively,

expect(myfunction).to.be.ok // checks if the target has a truthy value

You may also find this helpful reference guide for mocha/chai assertions/expectations.

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