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20 lines
576 B
JavaScript
20 lines
576 B
JavaScript
import { lower } from '../Lower'
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describe('Testing the Lower function', () => {
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it('Test 1: Check by invalid type', () => {
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expect(() => lower(345)).toThrowError();
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expect(() => lower(true)).toThrowError();
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expect(() => lower(null)).toThrowError();
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})
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it('Test 2: Check by uppercase string', () => {
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expect(lower('WORLD')).toBe('world');
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expect(lower('Hello_WORLD')).toBe('hello_world');
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})
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it('Test 3: Check by lowercase string', () => {
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expect(lower('hello')).toBe('hello');
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expect(lower('hello_world')).toBe('hello_world');
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})
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})
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