28 строки
696 B
JavaScript
28 строки
696 B
JavaScript
/**
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* Copyright (c) Facebook, Inc. and its affiliates.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @format
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* @emails oncall+react_native
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*/
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'use strict';
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describe('warnOnce', () => {
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const warnOnce = require('../warnOnce');
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it('logs warning messages to the console exactly once', () => {
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console.error = jest.fn();
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warnOnce('test-message', 'This is a log message');
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warnOnce('test-message', 'This is a second log message');
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expect(console.error).toHaveBeenCalledWith(
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'Warning: This is a log message',
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);
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expect(console.error).toHaveBeenCalledTimes(1);
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});
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});
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