Stop 06 · Programming Fundamentals for AutomationTopics · 1/10

Programming Basics (Java or Python)

In short

Automation means writing your test down so a computer can repeat it a thousand times without getting bored. For that, you need to speak a little code. Not a lot. Just enough.

The entry point into automation — enough general programming fluency in either Java or Python to write and understand test scripts, since both are dominant languages in the test automation ecosystem.

The purple blob points and gives instructions to a small robot pouring chai into glasses.

Think of it like this

Teaching a robot to make chai

Tell a robot 'make chai' and it just stares at you. Tell it 'boil water, add tea leaves, wait two minutes, add milk, pour' and you get chai. Code is exactly that: small, exact steps written in a language like Python or Java.

Watch it happen

What happens when you run a script

You write

Runtime

App acts

Check

Report

1/5You save your steps in a file, like test_login.py or LoginTest.java.

The big ideas

What you need to know

Top to bottom

A script runs one statement at a time, in order. If line 5 breaks, line 6 never runs.

Syntax is strict

A missing bracket or wrong indent stops everything. The computer won't guess what you meant.

Two styles

Python groups code by indentation. Java uses curly braces, semicolons and declared types like String and int.

Run it often

Write three lines, run, check. Small steps make mistakes easy to spot.

See it in code

Walk through the code

python

1# my_first_check.py2username = "test_user"3password = "secret12"4 5print("Checking password rules for", username)6 7if len(password) >= 8:8    print("PASS: password is long enough")9else:10    print("FAIL: password too short")

1/3Store test data in variables so you can change it in one place.

Your first tester script. Save it, run python my_first_check.py, then change the password to fail it.

Save yourself the pain

Common mistakes

Oops

Watching hours of tutorials before writing a single line yourself.

Do this instead

Type every example by hand and run it. Fingers learn syntax faster than eyes.

Oops

Trying to learn Java and Python together in the first month.

Do this instead

Pick one, get comfortable, then the second one comes much faster.

Your mission

Run your first script

~20 min

Quick check

Your script has 10 lines and line 4 throws an error. What happens to lines 5 to 10?

Go deeper

1Complete a beginner course in your chosen language, focused on general fundamentals.
2Practice writing small scripts solving simple problems before touching any automation tool.
3Learn to read error messages and tracebacks instead of getting stuck on them.