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