freesewing/markdown/dev/tutorials/pattern-design/testing-your-pattern/nl.md

---
title: 250|Testing your pattern
---

Nu de basisschets van je patroon klaar is, is dit een goed moment om te testen of het zich vlot aanpast aan andere afmetingen en de reeks opties die we hebben voorzien.

<Tip>

###### No more grading

FreeSewing patterns are *made-to-measure*, which means that you don't need to
grade your pattern to provide a range of sizes. Het is belangrijk dat je het patroon test met verschillende afmetingen en opties om te zien hoe goed het zich aanpast.

</Tip>

Als het klinkt als een hoop werk om je patroon te testen, dan heb je geluk. FreeSewing kan het voor jou doen. Click the **Test your pattern** button in the top navigation bar of your development environment, and you'll see a number of choices at the right:

 - Test patroonopties
 - Test afmetingen
 - Test modellen

The [API docs on sampling](/reference/api/pattern/#sample) have all the details on how this works, but for now we'll just look at the end result of each of these.

## Patroonopties testen

We hebben gewerkt met percentage-opties die kunnen variëren tussen een minimum- en een maximumwaarde. Voor deze tests zal FreeSewing het bereik verdelen in 10 stappen en je patroon schetsen voor elk van deze stappen.

Click on any of the options we've added to our pattern, and your bib will be drawn with that option sampled.

### lengthRatio

The `lengthRatio` option controls the length of our bib. Testing it confirms that it only influences the length:

<Example caption="Your bib with the lengthRatio option sampled" sample part="bib" pattern="tutorial" settings={{ sample: { type: "option", option: "lengthRatio" } }} />

### neckRatio

The `neckRatio` option will determine the size of the neck opening. For a the same `head` measurement, varying this option should result in bibs with increasingly larger neck opening.

Testing it confirms this. We can also see that as the neck opening gets smaller, we will rotate the straps further out of the way to avoid overlap:

<Example caption="Your bib with the neckRatio option sampled" sample part="bib" pattern="tutorial" settings={{ sample: { type: "option", option: "neckRatio" } }} />

### widthRatio

The `widthRatio` option will determine the width of our bib. For a the same `head` measurement, varying this option should result in increasingly wider bibs.

If we test it, we can see that it works as intended. But there's one thing that perhaps requires your attention. Making the bib wider shortens the length from the bottom of the neck opening to the bottom of the bib. Thereby making the bib shortern when its worn.

Even if the *total length* of the bib stays the same, the *useable length* shortens when the bib is made wider. Users will not expect this, so it's something that we should fix in our pattern. 

<Note>

Adjusting the pattern to make the `widthRatio` not influence the *useable length* of the bib is not
covered in this tutorial. It is left *as an exercise to the reader*.

</Note>

<Example caption="Your bib with the widthRatio option sampled" sample part="bib" pattern="tutorial" settings={{ sample: { type: "option", option: "widthRatio" } }} />

## Testing measurements

Testing a measurement will vary that measurement 10% up or down while leaving everything else the same. This gives you the option to determine how any given measurement is influencing the pattern.

For our bib, we only use one measurement, so it influences the entire pattern:

<Example caption="Your bib with the head circumference measurement sampled" sample part="bib" pattern="tutorial" settings={{ sample: { type: "measurement", measurement: "head" } }} />

## Testing models

Whereas testing a measurement will only vary one individual measurement, testing models will draft your pattern for different sets of measurments, which we refer to as *models*.

On the surface, the result below is the same as our measurement test. But that is because our bib only uses one measurement. So testing that one measurement ends up being the same as testing a complete set of measurements.

But most patterns use multiple measurements, and you'll find this test gives you insight into how your pattern will adapt to differently sizes bodies.

<Example sample caption="Your bib sampled for a range of baby sizes" pattern="tutorial" part="bib" settings={{ sample: { type: "models", models: { baby1: head: 340 }, baby2: 350 baby3: 360 baby4: 370 baby5: 380 baby6: 390 baby7: 400 baby8: 410 baby9: 420 } } }} />

## The antman test

A special case of model testing is the so-called *antman test*. It drafts your pattern with a set of *typical* measurements , and then drafts it again with measurements that are 1/10th of those *typical* measurements.

It is named after [the cartoon character](https://en.wikipedia.org/wiki/Ant-Man_(film)) who can shrink, yet somehow his suit still fits.

The purpose of the antman test is to bring out areas in your pattern where you made assumptions that will not properly scale. Many drafting books will tell you to *add 3cm there* or *measure 2 inch to the right*. Those instructions don't scale, and you should avoid them.

The best patterns will pass the antman test with 2 exact pattern. One will simply be 1/10th the scale of the other.

<Example sample caption="Congratulations, your bib passes the antman test" pattern="tutorial" part="bib" settings={{ sample: { type: "models", models: { ant: head: 39 }, man: 390 } } }} />

When you're happy with how your pattern passes these tests, it's time to complete it.