mirror of
https://github.com/facebook/react-native.git
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Andres Suarez
8bd3edec88
Reviewed By: aaronabramov Differential Revision: D33367752 fbshipit-source-id: 4ce94d184485e5ee0a62cf67ad2d3ba16e285c8f
28 lines
736 B
JavaScript
28 lines
736 B
JavaScript
/**
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* Copyright (c) Meta Platforms, Inc. and 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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jest.spyOn(console, 'warn').mockReturnValue(undefined);
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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.warn).toHaveBeenCalledWith('This is a log message');
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expect(console.warn).toHaveBeenCalledTimes(1);
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console.warn.mockRestore();
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});
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});
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