There are 3 simple tests:
simple-jest-> test without percySnapshotjest-percy-> test with percySnapshot and import syntaxjest-percy-2-> test with percySnapshot and require syntax
There are 3 run options with --debug which won't create percy builds:
percy:node-> percy exec using node + experimental modules flag + path to modules bin jestpercy:jest-> percy exec with jest onlypercy:jest-node-> percy exec using node + experimental modules flag + path to jest.js bin
All 3 runs are failing for tests which contain percySnapshot.
✗ npm run percy:node
> node-docker-percy@1.0.0 percy:node
> npx percy exec --debug -- node --experimental-vm-modules node_modules/.bin/jest
[percy] Percy has started!
[percy:cli:exec] Running "node --experimental-vm-modules node_modules/.bin/jest" (0ms)
(node:13951) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:13972) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:13973) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:13974) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
PASS tests/simple-jest.ts
Simple Jest test
✓ Has correct page title (4 ms)
FAIL tests/jest-percy-2.ts
Jest Percy with require test
✕ Has correct page title (13 ms)
● Jest Percy with require test › Has correct page title
Cannot find module '#logger' from 'node_modules/@percy/logger/dist/index.js'
at Resolver._throwModNotFoundError (node_modules/jest-resolve/build/resolver.js:491:11)
at async Promise.all (index 0)
FAIL tests/jest-percy.ts
Jest Percy with import test
✕ Has correct page title (9 ms)
● Jest Percy with import test › Has correct page title
Cannot find module '#logger' from 'node_modules/@percy/logger/dist/index.js'
at Resolver._throwModNotFoundError (node_modules/jest-resolve/build/resolver.js:491:11)
at async Promise.all (index 0)
Test Suites: 2 failed, 1 passed, 3 total
Tests: 2 failed, 1 passed, 3 total
Snapshots: 0 total
Time: 1.947 s, estimated 2 s
Ran all test suites.
[percy] Build not created
✗ npm run percy:jest
> percy:jest
> npx percy exec --debug -- jest
[percy] Percy has started!
[percy:cli:exec] Running "jest" (0ms)
FAIL tests/jest-percy.ts
Jest Percy with import test
✕ Has correct page title (3 ms)
● Jest Percy with import test › Has correct page title
You need to run with a version of node that supports ES Modules in the VM API. See https://jestjs.io/docs/ecmascript-modules
11 | test('Has correct page title', async () => {
12 | await expect(page.title()).resolves.toMatch('Google')
> 13 | await percySnapshot(page, 'Google Home page')
| ^
14 | })
15 | })
at invariant (node_modules/jest-runtime/build/index.js:2569:11)
at percySnapshot (node_modules/@percy/puppeteer/index.js:9:15)
at Object.<anonymous> (tests/jest-percy.ts:13:15)
FAIL tests/jest-percy-2.ts
Jest Percy with require test
✕ Has correct page title (3 ms)
● Jest Percy with require test › Has correct page title
You need to run with a version of node that supports ES Modules in the VM API. See https://jestjs.io/docs/ecmascript-modules
11 | test('Has correct page title', async () => {
12 | await expect(page.title()).resolves.toMatch('Google')
> 13 | await percySnapshot(page, 'Google Home page')
| ^
14 | })
15 | })
at invariant (node_modules/jest-runtime/build/index.js:2569:11)
at percySnapshot (node_modules/@percy/puppeteer/index.js:9:15)
at Object.percySnapshot (tests/jest-percy-2.ts:13:15)
PASS tests/simple-jest.ts
Simple Jest test
✓ Has correct page title (3 ms)
Test Suites: 2 failed, 1 passed, 3 total
Tests: 2 failed, 1 passed, 3 total
Snapshots: 0 total
Time: 1.542 s, estimated 2 s
Ran all test suites.
[percy] Build not created
✗ npm run percy:jest-node
> percy:jest-node
> npx percy exec --debug -- node --experimental-vm-modules node_modules/jest/bin/jest.js
[percy] Percy has started!
[percy:cli:exec] Running "node --experimental-vm-modules node_modules/jest/bin/jest.js" (0ms)
(node:14070) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:14085) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:14086) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
(node:14087) ExperimentalWarning: VM Modules is an experimental feature. This feature could change at any time
(Use `node --trace-warnings ...` to show where the warning was created)
PASS tests/simple-jest.ts
Simple Jest test
✓ Has correct page title (2 ms)
FAIL tests/jest-percy-2.ts
Jest Percy with require test
✕ Has correct page title (10 ms)
● Jest Percy with require test › Has correct page title
Cannot find module '#logger' from 'node_modules/@percy/logger/dist/index.js'
at Resolver._throwModNotFoundError (node_modules/jest-resolve/build/resolver.js:491:11)
at async Promise.all (index 0)
FAIL tests/jest-percy.ts
Jest Percy with import test
✕ Has correct page title (11 ms)
● Jest Percy with import test › Has correct page title
Cannot find module '#logger' from 'node_modules/@percy/logger/dist/index.js'
at Resolver._throwModNotFoundError (node_modules/jest-resolve/build/resolver.js:491:11)
at async Promise.all (index 0)
Test Suites: 2 failed, 1 passed, 3 total
Tests: 2 failed, 1 passed, 3 total
Snapshots: 0 total
Time: 2.222 s
Ran all test suites.
[percy] Build not created