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index.test.js
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index.test.js
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const assert = require('assert').strict || require('assert');
const React = require('react');
const ariaLabelPropType = require('./index');
// A simple, styled button
function ConfirmButton({ children, ...props }) {
return React.createElement(
'button',
{
style: { backgroundColor: 'green', borderRadius: 12, padding: 8 },
...props,
},
children
);
}
ConfirmButton.propTypes = {
'aria-label': ariaLabelPropType,
};
// A button that can change its contents based on its state:
function StatusButton({ children, ...props }) {
const [status, setStatus] = React.useState('inactive');
const onMouseDown = React.useCallback(() => setStatus('active'), [
setStatus,
]);
const onMouseUp = React.useCallback(() => setStatus('inactive'), [
setStatus,
]);
// Accepts either child nodes, or a render prop that takes the current status:
const content =
typeof children === 'function' ? children(status) : children;
return React.createElement(
'button',
{
...props,
onMouseDown: onMouseDown,
onMouseUp: onMouseUp,
},
content
);
}
StatusButton.propTypes = {
'aria-label': ariaLabelPropType.renderPropDefault('inactive').isRequired,
};
describe('aria-label-prop-type', () => {
const getSanitizedWarning = () => {
return global.console.error.mock.calls[0][0]
.replace(/0.\d+/g, '')
.replace(/\s\s+/g, ' ');
};
beforeEach((...args) => {
// Mock console.error to listen to PropType warnings:
global.console.error = jest.fn();
// Update component displayNames to avoid React de-duping them:
// https://github.com/facebook/react/issues/7047
// These are sanitized by getSanitizedWarning()
ConfirmButton.displayName = 'ConfirmButton' + Math.random();
StatusButton.displayName = 'StatusButton' + Math.random();
});
describe('react node children', () => {
it('should error if no label or text child is present', () => {
const el = React.createElement(
ConfirmButton,
{},
React.createElement('img', { src: 'test.png' })
);
assert.equal(console.error.mock.calls.length, 1);
assert.equal(
getSanitizedWarning(),
'Warning: Failed prop type: `ConfirmButton` must have either an `aria-label` prop, or one or more text (string) children for screen-reader accessibility. in ConfirmButton'
);
});
it('should not error if there is an aria-label prop', () => {
const el = React.createElement(
ConfirmButton,
{ 'aria-label': 'Confirm' },
React.createElement('img', { src: 'test.png' })
);
assert.equal(console.error.mock.calls.length, 0);
});
it('should not error if the child is a string', () => {
const el = React.createElement(ConfirmButton, {}, 'Confirm');
assert.equal(console.error.mock.calls.length, 0);
});
it('should not error if there is an aria-label prop', () => {
const el = React.createElement(
ConfirmButton,
{},
React.createElement(
'div',
{},
React.createElement('img', { src: 'test.png' }),
'Confirm'
)
);
assert.equal(console.error.mock.calls.length, 0);
});
});
describe('render prop child', () => {
it('should error if no label or text child is present', () => {
const el = React.createElement(StatusButton, {}, (status) =>
React.createElement('img', { src: 'test.png' })
);
assert.equal(console.error.mock.calls.length, 1);
assert.equal(
getSanitizedWarning(),
'Warning: Failed prop type: `StatusButton` must have either an `aria-label` prop, or one or more text (string) children for screen-reader accessibility. in StatusButton'
);
});
it('should not error if there is an aria-label prop', () => {
const el = React.createElement(
StatusButton,
{ 'aria-label': 'Confirm' },
(status) => React.createElement('img', { src: 'test.png' })
);
assert.equal(console.error.mock.calls.length, 0);
});
it('should not error if the render prop returns a string', () => {
const el = React.createElement(
StatusButton,
{},
(status) => 'Confirm (' + status + ')'
);
assert.equal(console.error.mock.calls.length, 0);
});
it('should not error if there is an aria-label prop', () => {
const el = React.createElement(StatusButton, {}, (status) =>
React.createElement(
'div',
{},
React.createElement('img', { src: 'test.png' }),
'Confirm (' + status + ')'
)
);
assert.equal(console.error.mock.calls.length, 0);
});
it('should error if there is a non-render-prop child but no text', () => {
global.console.error = jest.fn();
const el = React.createElement(
StatusButton,
{},
React.createElement('img', { src: 'test.png' })
);
assert.equal(console.error.mock.calls.length, 1);
assert.equal(
getSanitizedWarning(),
'Warning: Failed prop type: `StatusButton` must have either an `aria-label` prop, or one or more text (string) children for screen-reader accessibility. in StatusButton'
);
});
it('should not error if there is a non-render-prop child including text', () => {
const el = React.createElement(
StatusButton,
{},
React.createElement(
'div',
{},
React.createElement('img', { src: 'test.png' }),
'Confirm'
)
);
assert.equal(console.error.mock.calls.length, 0);
});
});
});