Custom Fixtures

Build your own fixtures when the built-in ones are not enough.

Big Picture

One small picture can make this idea easier to hold.

Reusable helper

• Setup lives in one place.
• Tests stay small.
• Changes are easy to make.
• State can be cleaned well.

Copy-paste setup

• Setup is copied everywhere.
• Changes must be repeated.
• Mistakes spread fast.
• Files become noisy.

VerdictCustom fixtures pay off when the same setup repeats a lot.

How It Moves

Short steps make the flow easier to see.

Find the repeat

Look for setup many tests share.

Wrap it up

Put the setup in one fixture.

3

Expose the helper

Pass the useful value to the test.

4

Reuse it

Call it in every test that needs it.

Step By Step

This is the same idea, stretched across time.

1. 1

   Notice the repeat

   Find setup that keeps showing up.

2. 2

   Build the fixture

   Write the helper once.

3. 3

   Use it in tests

   Pull the helper into each test.

4. 4

   Maintain it once

   Change one place when the setup changes.

One Small Model

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

Custom fixture

5 fields

Name:"loggedInPage"

Setup:"Sign in once"

Use:"Many tests"

Cleanup:"Auto"

Value:"Fresh page state"

Quick Check

Question 1 of 10 correct

Why make a custom fixture?

To reuse special setup in many testsTo delete the page fixtureTo avoid writing any testsTo slow the suite on purpose

HintSubmit

Map It

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

Reuse map

Fixture shape

Complex

Best fit

Login helper used by many tests

Good fit

Seed data helper

Too much

One-off tiny helper

Watch it

Deep nested setup

Simple

Little reuseHigh reuse

How often setup repeats

Final Quiz

Question 1 of 30 correct

When should you make a custom fixture?

When many tests need the same setupWhen you want fewer assertionsWhen the page is blankWhen you want to skip cleanup

HintSubmit