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import { act, renderHook } from '@testing-library/react-hooks';
import useDefault from '../src/useDefault';
const setUp = (defaultValue: any, initialValue: any) =>
renderHook(() => useDefault(defaultValue, initialValue));
describe.each`
valueType | defaultValue | initialValue | anotherValue
${'number'} | ${0} | ${5} | ${77}
${'object'} | ${{}} | ${{ name: 'John Doe' }} | ${{ name: 'Solid Snake' }}
${'boolean'} | ${false} | ${false} | ${true}
${'string'} | ${''} | ${'foo'} | ${'bar'}
`('when value type is $valueType', ({ defaultValue, initialValue, anotherValue }) => {
it('should init state with initial value', () => {
const { result } = setUp(defaultValue, initialValue);
const [value, setValue] = result.current;
expect(value).toBe(initialValue);
expect(setValue).toBeInstanceOf(Function);
});
it('should set state to another value', () => {
const { result } = setUp(defaultValue, initialValue);
const [, setValue] = result.current;
act(() => setValue(anotherValue));
expect(result.current[0]).toBe(anotherValue);
});
it('should return default value if state set to null', () => {
const { result } = setUp(defaultValue, initialValue);
const [, setValue] = result.current;
act(() => setValue(null));
expect(result.current[0]).toBe(defaultValue);
});
it('should return default value if state set to undefined', () => {
const { result } = setUp(defaultValue, initialValue);
const [, setValue] = result.current;
act(() => setValue(undefined));
expect(result.current[0]).toBe(defaultValue);
});
it('should handle state properly after being set to nil and then to another value', () => {
const { result } = setUp(defaultValue, initialValue);
const [, setValue] = result.current;
act(() => setValue(undefined));
expect(result.current[0]).toBe(defaultValue);
act(() => setValue(null));
expect(result.current[0]).toBe(defaultValue);
act(() => setValue(anotherValue));
expect(result.current[0]).toBe(anotherValue);
});
});
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