Parameterization

Run the same test with many data sets.

Big Picture

One small picture can make this idea easier to hold.

Data driven

• One test runs many cases.
• New data is easy to add.
• The file stays short.
• Edge cases are clearer.

Many copy tests

• Same steps are copied a lot.
• Updates must be made many times.
• The suite gets noisy.
• Small mistakes repeat.

VerdictParameterization gives more coverage with less code.

How It Moves

Short steps make the flow easier to see.

List the cases

Write the inputs and expected results.

Feed the test

Pass each row into the same test.

3

Run many times

The same logic checks each data set.

Read the output

See which data case passed or failed.

Step By Step

This is the same idea, stretched across time.

1. 1

   Choose the data

   Pick the values you want to test.

2. 2

   Write one test

   Use the same steps for each case.

3. 3

   Run all rows

   Let the test loop over the inputs.

4. 4

   Check coverage

   Make sure the edge cases are included.

One Small Model

Think of this like a tiny card you can keep in your pocket.

Case grid

5 fields

Case 1:"empty input"

Case 2:"valid email"

Case 3:"too long text"

Shared step:"submit form"

Result:"Pass or fail"

Quick Check

Question 1 of 10 correct

What is parameterization used for?

Running the same test with different dataChanging the browser themeSkipping all edge casesMaking code harder to read

HintSubmit

Map It

One more picture helps you see where this lesson matters most.

Coverage map

Coverage value

High

Best

One test, many rows

Good

Add one edge case

Weak

Copy the same test

Okay

A tiny data set

Low

Few casesMany cases

Data count

Final Quiz

Question 1 of 30 correct

What does parameterization do?

Runs one test with many data setsCreates a new browserRemoves all hooksTurns off assertions

HintSubmit