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import isBoolean from '../../utils/isBoolean';
describe('isBoolean', () => {
it('should return true when value is a boolean', () => {
expect(isBoolean(true)).toBeTruthy();
expect(isBoolean(false)).toBeTruthy();
});
it('should return false when value is not a boolean', () => {
expect(isBoolean(null)).toBeFalsy();
expect(isBoolean(undefined)).toBeFalsy();
expect(isBoolean(-1)).toBeFalsy();
expect(isBoolean(0)).toBeFalsy();
expect(isBoolean(1)).toBeFalsy();
expect(isBoolean('')).toBeFalsy();
expect(isBoolean({})).toBeFalsy();
expect(isBoolean([])).toBeFalsy();
expect(isBoolean(() => null)).toBeFalsy();
});
});
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