14 lines
396 B
JavaScript
14 lines
396 B
JavaScript
const expect = require('expect');
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const {insertBefore} = require('./_30s.js');
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test('insertBefore is a Function', () => {
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expect(insertBefore).toBeInstanceOf(Function);
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});
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let e = document.createElement('div');
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e.setAttribute("id", "test");
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test('Does not throw error if the element exists', () => {
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expect(() => {
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insertBefore(e, '<span>test</span>');
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}).not.toThrow(TypeError);
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});
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