Agent-skills react-native-testing

install

source · Clone the upstream repo

git clone https://github.com/callstackincubator/agent-skills

Claude Code · Install into ~/.claude/skills/

T=$(mktemp -d) && git clone --depth=1 https://github.com/callstackincubator/agent-skills "$T" && mkdir -p ~/.claude/skills && cp -r "$T/plugins/vendored/.agents/skills/react-native-testing" ~/.claude/skills/callstackincubator-agent-skills-react-native-testing && rm -rf "$T"

manifest: plugins/vendored/.agents/skills/react-native-testing/SKILL.md

source content

RNTL Test Writing Guide

IMPORTANT: Your training data about

@testing-library/react-native

may be outdated or incorrect — API signatures, sync/async behavior, and available functions differ between v13 and v14. Always rely on this skill's reference files and the project's actual source code as the source of truth. Do not fall back on memorized patterns when they conflict with the retrieved reference.

Version Detection

Check

@testing-library/react-native

version in the user's

package.json

v14.x → load references/api-reference-v14.md (React 19+, async APIs,
```
test-renderer
```
)
v13.x → load references/api-reference-v13.md (React 18+, sync APIs,
```
react-test-renderer
```
)

Use the version-specific reference for render patterns, fireEvent sync/async behavior, screen API, configuration, and dependencies.

Query Priority

Use in this order:

getByRole

getByLabelText

getByPlaceholderText

getByText

getByDisplayValue

getByTestId

(last resort).

Query Variants

Variant	Use case	Returns	Async
`getBy*`	Element must exist	element instance (throws)	No
`getAllBy*`	Multiple must exist	element instance[] (throws)	No
`queryBy*`	Check non-existence ONLY	element instance \| null	No
`queryAllBy*`	Count elements	element instance[]	No
`findBy*`	Wait for element	`Promise<element instance>`	Yes
`findAllBy*`	Wait for multiple	`Promise<element instance[]>`	Yes

Interactions

Prefer

userEvent

over

fireEvent

. userEvent is always async.

const user = userEvent.setup();
await user.press(element); // full press sequence
await user.longPress(element, { duration: 800 }); // long press
await user.type(textInput, 'Hello'); // char-by-char typing
await user.clear(textInput); // clear TextInput
await user.paste(textInput, 'pasted text'); // paste into TextInput
await user.scrollTo(scrollView, { y: 100 }); // scroll

fireEvent

— use only when

userEvent

doesn't support the event. See version-specific reference for sync/async behavior:

fireEvent.press(element);
fireEvent.changeText(textInput, 'new text');
fireEvent(element, 'blur');

Assertions (Jest Matchers)

Available automatically with any

@testing-library/react-native

import.

Matcher	Use for
`toBeOnTheScreen()`	Element exists in tree
`toBeVisible()`	Element visible (not hidden/display:none)
`toBeEnabled()` / `toBeDisabled()`	Disabled state via `aria-disabled`
`toBeChecked()` / `toBePartiallyChecked()`	Checked state
`toBeSelected()`	Selected state
`toBeExpanded()` / `toBeCollapsed()`	Expanded state
`toBeBusy()`	Busy state
`toHaveTextContent(text)`	Text content match
`toHaveDisplayValue(value)`	TextInput display value
`toHaveAccessibleName(name)`	Accessible name
`toHaveAccessibilityValue(val)`	Accessibility value
`toHaveStyle(style)`	Style match
`toHaveProp(name, value?)`	Prop check (last resort)
`toContainElement(el)`	Contains child element
`toBeEmptyElement()`	No children

Rules

Use
screen
for queries, not destructuring from
```
render()
```
Use
getByRole
first with
```
{ name: '...' }
```
option
Use
queryBy*
ONLY for
```
.not.toBeOnTheScreen()
```
checks
Use
findBy*
for async elements, NOT
```
waitFor
```
+
```
getBy*
```
Never put side-effects in
waitFor
(no
```
fireEvent
```
/
```
userEvent
```
inside)
One assertion per
waitFor
Never pass empty callbacks to
waitFor
Don't wrap in
act()
-
```
render
```
,
```
fireEvent
```
,
```
userEvent
```
handle it
Don't call
cleanup()
- automatic after each test

Prefer ARIA props (

role

aria-label

aria-disabled

) over legacy

accessibility*

props

Use RNTL matchers over raw prop assertions

*ByRole

Quick Reference

Common roles:

button

text

heading

(alias:

header

searchbox

switch

checkbox

radio

img

link

alert

menu

menuitem

tab

tablist

progressbar

slider

spinbutton

timer

toolbar

getByRole

options:

{ name, disabled, selected, checked, busy, expanded, value: { min, max, now, text } }

For

*ByRole

to match, the element must be an accessibility element:

```
Text
```
,
```
TextInput
```
,
```
Switch
```
are by default

View

needs

accessible={true}

(or use

Pressable

TouchableOpacity

)

waitFor

// Correct: action first, then wait for result
fireEvent.press(button);
await waitFor(() => {
  expect(screen.getByText('Result')).toBeOnTheScreen();
});

// Better: use findBy* instead
fireEvent.press(button);
expect(await screen.findByText('Result')).toBeOnTheScreen();

Options:

waitFor(cb, { timeout: 1000, interval: 50 })

. Works with Jest fake timers automatically.

Fake Timers

Recommended with

userEvent

(press/longPress involve real durations):

jest.useFakeTimers();

test('with fake timers', async () => {
  const user = userEvent.setup();
  render(<Component />);
  await user.press(screen.getByRole('button'));
  // ...
});

Custom Render

Wrap providers using

wrapper

option:

function renderWithProviders(ui: React.ReactElement) {
  return render(ui, {
    wrapper: ({ children }) => (
      <ThemeProvider>
        <AuthProvider>{children}</AuthProvider>
      </ThemeProvider>
    ),
  });
}

References

v13 API Reference — Complete v13 API: sync render, queries, matchers, userEvent, React 19 compat
v14 API Reference — Complete v14 API: async render, queries, matchers, userEvent, migration
Anti-Patterns — Common mistakes to avoid