83a6a6ea32
* chore: make aware eslint that we use jest By setting up the jest environment, we no longer need to declare the 'test' global in the configuration. * chore: don't need to import expect, it's a jest environment global * chore: don't need to import expect when creating undefined test
19 lines
496 B
JavaScript
19 lines
496 B
JavaScript
const { functionName } = require('./_30s.js');
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let output = '';
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test('functionName is a Function', () => {
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expect(functionName).toBeInstanceOf(Function);
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});
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test('Works for native functions', () => {
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expect(typeof functionName(Math.max)).toBe('function');
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});
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function f(x) {
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return x;
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}
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test('Works for normal functions', () => {
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expect(typeof functionName(f)).toBe('function');
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});
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test('Works for arrow functions', () => {
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expect(typeof functionName(x => x)).toBe('function');
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});
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