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describe('Test warning', () => {
let spy: jest.SpyInstance;
beforeAll(() => {
spy = jest.spyOn(console, 'error').mockImplementation(() => {});
});
afterAll(() => {
spy.mockRestore();
});
beforeEach(() => {
jest.resetModules();
});
afterEach(() => {
spy.mockReset();
});
it('Test noop', async () => {
const { noop } = await import('../warning');
const value = noop();
expect(value).toBe(undefined);
expect(spy).not.toHaveBeenCalled();
expect(noop).not.toThrow();
});
describe('process.env.NODE_ENV !== "production"', () => {
it('If `false`, exec `console.error`', async () => {
const warning = (await import('../warning')).default;
warning(false, 'error');
expect(spy).toHaveBeenCalled();
});
it('If `true`, do not exec `console.error`', async () => {
const warning = (await import('../warning')).default;
warning(true, 'error message');
expect(spy).not.toHaveBeenCalled();
});
});
describe('process.env.NODE_ENV === "production"', () => {
it('Whether `true` or `false`, do not exec `console.error`', async () => {
const prevEnv = process.env.NODE_ENV;
process.env.NODE_ENV = 'production';
const { default: warning, noop } = await import('../warning');
expect(warning).toEqual(noop);
warning(false, 'error message');
expect(spy).not.toHaveBeenCalled();
warning(true, 'error message');
expect(spy).not.toHaveBeenCalled();
process.env.NODE_ENV = prevEnv;
});
});
});