11 lines
284 B
JavaScript
11 lines
284 B
JavaScript
const expect = require('expect');
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const isNull = require('./isNull.js');
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test('isNull is a Function', () => {
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expect(isNull).toBeInstanceOf(Function);
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});
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t.equal(isNull(null), true, "passed argument is a null");
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t.equal(isNull(NaN), false, "passed argument is a null");
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