|
| 1 | +import { applyTargetRegionToEnv, withTargetRegion } from '../target-region.js'; |
| 2 | +import { afterEach, beforeEach, describe, expect, it } from 'vitest'; |
| 3 | + |
| 4 | +describe('target-region', () => { |
| 5 | + let savedRegion: string | undefined; |
| 6 | + let savedDefaultRegion: string | undefined; |
| 7 | + |
| 8 | + beforeEach(() => { |
| 9 | + savedRegion = process.env.AWS_REGION; |
| 10 | + savedDefaultRegion = process.env.AWS_DEFAULT_REGION; |
| 11 | + delete process.env.AWS_REGION; |
| 12 | + delete process.env.AWS_DEFAULT_REGION; |
| 13 | + }); |
| 14 | + |
| 15 | + afterEach(() => { |
| 16 | + if (savedRegion !== undefined) process.env.AWS_REGION = savedRegion; |
| 17 | + else delete process.env.AWS_REGION; |
| 18 | + if (savedDefaultRegion !== undefined) process.env.AWS_DEFAULT_REGION = savedDefaultRegion; |
| 19 | + else delete process.env.AWS_DEFAULT_REGION; |
| 20 | + }); |
| 21 | + |
| 22 | + describe('applyTargetRegionToEnv', () => { |
| 23 | + it('sets AWS_REGION and AWS_DEFAULT_REGION to the provided region', () => { |
| 24 | + applyTargetRegionToEnv('ap-southeast-2'); |
| 25 | + expect(process.env.AWS_REGION).toBe('ap-southeast-2'); |
| 26 | + expect(process.env.AWS_DEFAULT_REGION).toBe('ap-southeast-2'); |
| 27 | + }); |
| 28 | + |
| 29 | + it('returns a restore function that clears env vars when they were previously unset', () => { |
| 30 | + const restore = applyTargetRegionToEnv('eu-west-1'); |
| 31 | + restore(); |
| 32 | + expect(process.env.AWS_REGION).toBeUndefined(); |
| 33 | + expect(process.env.AWS_DEFAULT_REGION).toBeUndefined(); |
| 34 | + }); |
| 35 | + |
| 36 | + it('returns a restore function that restores previous env var values', () => { |
| 37 | + process.env.AWS_REGION = 'us-east-1'; |
| 38 | + process.env.AWS_DEFAULT_REGION = 'us-east-1'; |
| 39 | + |
| 40 | + const restore = applyTargetRegionToEnv('ap-south-1'); |
| 41 | + expect(process.env.AWS_REGION).toBe('ap-south-1'); |
| 42 | + expect(process.env.AWS_DEFAULT_REGION).toBe('ap-south-1'); |
| 43 | + |
| 44 | + restore(); |
| 45 | + expect(process.env.AWS_REGION).toBe('us-east-1'); |
| 46 | + expect(process.env.AWS_DEFAULT_REGION).toBe('us-east-1'); |
| 47 | + }); |
| 48 | + |
| 49 | + it('restores each env var independently (only one was previously set)', () => { |
| 50 | + process.env.AWS_REGION = 'us-west-2'; |
| 51 | + // AWS_DEFAULT_REGION intentionally left unset |
| 52 | + |
| 53 | + const restore = applyTargetRegionToEnv('eu-central-1'); |
| 54 | + expect(process.env.AWS_REGION).toBe('eu-central-1'); |
| 55 | + expect(process.env.AWS_DEFAULT_REGION).toBe('eu-central-1'); |
| 56 | + |
| 57 | + restore(); |
| 58 | + expect(process.env.AWS_REGION).toBe('us-west-2'); |
| 59 | + expect(process.env.AWS_DEFAULT_REGION).toBeUndefined(); |
| 60 | + }); |
| 61 | + }); |
| 62 | + |
| 63 | + describe('withTargetRegion', () => { |
| 64 | + it('applies region inside the callback and restores afterwards', async () => { |
| 65 | + let seenRegion: string | undefined; |
| 66 | + let seenDefaultRegion: string | undefined; |
| 67 | + |
| 68 | + await withTargetRegion('ap-northeast-1', () => { |
| 69 | + seenRegion = process.env.AWS_REGION; |
| 70 | + seenDefaultRegion = process.env.AWS_DEFAULT_REGION; |
| 71 | + return Promise.resolve(); |
| 72 | + }); |
| 73 | + |
| 74 | + expect(seenRegion).toBe('ap-northeast-1'); |
| 75 | + expect(seenDefaultRegion).toBe('ap-northeast-1'); |
| 76 | + expect(process.env.AWS_REGION).toBeUndefined(); |
| 77 | + expect(process.env.AWS_DEFAULT_REGION).toBeUndefined(); |
| 78 | + }); |
| 79 | + |
| 80 | + it('restores env vars even when the callback throws', async () => { |
| 81 | + process.env.AWS_REGION = 'us-east-1'; |
| 82 | + |
| 83 | + await expect( |
| 84 | + withTargetRegion('sa-east-1', () => { |
| 85 | + expect(process.env.AWS_REGION).toBe('sa-east-1'); |
| 86 | + return Promise.reject(new Error('boom')); |
| 87 | + }) |
| 88 | + ).rejects.toThrow('boom'); |
| 89 | + |
| 90 | + expect(process.env.AWS_REGION).toBe('us-east-1'); |
| 91 | + expect(process.env.AWS_DEFAULT_REGION).toBeUndefined(); |
| 92 | + }); |
| 93 | + |
| 94 | + it('returns the callback result', async () => { |
| 95 | + const result = await withTargetRegion('eu-west-2', () => Promise.resolve(42)); |
| 96 | + expect(result).toBe(42); |
| 97 | + }); |
| 98 | + }); |
| 99 | +}); |
0 commit comments