I was struggling to understand how unit testing works and why would I need that. I tried to read all the tutorials and discussion, but still could not get into my mind yet. Then, I just realized that I never tried to get it hands-on. So I picked one simple tutorial on PHPUnit and follow the steps. And that's the "oh my god I get it" moment for me to basically understand the unit testing. Conclusion is, read only is not enough, get our hands dirty and keep practicing until we get it.
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