axios/test/specs/helpers/isAxiosError.spec.js

import AxiosError from '../../../lib/core/AxiosError';
import isAxiosError from '../../../lib/helpers/isAxiosError';

describe('helpers::isAxiosError', function () {
  it('should return true if the error is created by core::createError', function () {
    expect(isAxiosError(new AxiosError('Boom!', null, { foo: 'bar' }))).toBe(true);
  });

  it('should return true if the error is enhanced by core::enhanceError', function () {
    expect(isAxiosError(AxiosError.from(new Error('Boom!'), null, { foo: 'bar' }))).toBe(true);
  });

  it('should return false if the error is a normal Error instance', function () {
    expect(isAxiosError(new Error('Boom!'))).toBe(false);
  });

  it('should return false if the error is null', function () {
    expect(isAxiosError(null)).toBe(false);
  });
});