get-error-message.test.ts46 lines · main

1	import { describe, expect, it } from 'vitest'
2
3	import { getErrorMessage } from './get-error-message'
4
5	describe('getErrorMessage', () => {
6	it('returns null for null', () => {
7	expect(getErrorMessage(null)).toBe(null)
8	})
9
10	it('returns null for undefined', () => {
11	expect(getErrorMessage(undefined)).toBe(null)
12	})
13
14	it('returns the string for string errors', () => {
15	expect(getErrorMessage('Something went wrong')).toBe('Something went wrong')
16	expect(getErrorMessage('')).toBe('')
17	})
18
19	it('returns the message for Error instances', () => {
20	expect(getErrorMessage(new Error('Failed to load'))).toBe('Failed to load')
21	expect(getErrorMessage(new TypeError('Invalid type'))).toBe('Invalid type')
22	})
23
24	it('returns the message property for objects with message', () => {
25	expect(getErrorMessage({ message: 'Custom error' })).toBe('Custom error')
26	expect(getErrorMessage({ message: 123 })).toBe('123')
27	expect(getErrorMessage({ message: null })).toBe('null')
28	})
29
30	it('converts other types to string', () => {
31	expect(getErrorMessage(123)).toBe('123')
32	expect(getErrorMessage(true)).toBe('true')
33	expect(getErrorMessage(false)).toBe('false')
34	expect(getErrorMessage({})).toBe('[object Object]')
35	expect(getErrorMessage([])).toBe('')
36	})
37
38	it('handles objects without message property', () => {
39	expect(getErrorMessage({ code: 500 })).toBe('[object Object]')
40	expect(getErrorMessage({ error: 'test' })).toBe('[object Object]')
41	})
42
43	it('handles nested error objects', () => {
44	expect(getErrorMessage({ message: { nested: 'error' } })).toBe('[object Object]')
45	})
46	})