expect(received).toMatch(expected)

Expected pattern: /error.*The mandatory attribute 'height' is missing in tag 'amp-video'\./
Received string:  "info  - Checking validity of types...
info  - Creating an optimized production build...
info  - Compiled successfully
info  - Collecting page data...
info  - Generating static pages (0/8)
info  - Generating static pages (2/8)
info  - Generating static pages (4/8)
info  - Generating static pages (6/8)
info  - Generating static pages (8/8)
Amp Validation·
/cat          warn  The native JavaScript AMPHTML Validator (validator.js) has been turned down. If you are seeing this error, update your tooling to instead load the API compatible WebAssembly AMPHTML Validator (validator_wasm.js) instead.·
/dog-cat      warn  The native JavaScript AMPHTML Validator (validator.js) has been turned down. If you are seeing this error, update your tooling to instead load the API compatible WebAssembly AMPHTML Validator (validator_wasm.js) instead.·
/dog          warn  The native JavaScript AMPHTML Validator (validator.js) has been turned down. If you are seeing this error, update your tooling to instead load the API compatible WebAssembly AMPHTML Validator (validator_wasm.js) instead.·
/first        warn  The native JavaScript AMPHTML Validator (validator.js) has been turned down. If you are seeing this error, update your tooling to instead load the API compatible WebAssembly AMPHTML Validator (validator_wasm.js) instead.·
/second       warn  The native JavaScript AMPHTML Validator (validator.js) has been turned down. If you are seeing this error, update your tooling to instead load the API compatible WebAssembly AMPHTML Validator (validator_wasm.js) instead.·
/third?amp=1  warn  The native JavaScript AMPHTML Validator (validator.js) has been turned down. If you are seeing this error, update your tooling to instead load the API compatible WebAssembly AMPHTML Validator (validator_wasm.js) instead.·
info  - Finalizing page optimization...·
Page                                       Size     First Load JS
┌ ○ /404                                   195 B          71.2 kB
├ ○ /cat (585 ms)                          AMP                AMP
├ ○ /dog                                   AMP                AMP
├ ○ /dog-cat                               AMP                AMP
├ ○ /first                                 AMP                AMP
├ ○ /second                                AMP                AMP
└ ○ /third                                 280 B          71.3 kB
+ First Load JS shared by all              71.1 kB
  ├ chunks/framework-158f450427c55907.js   41.9 kB
  ├ chunks/main-080e92ea80d1caab.js        27 kB
  ├ chunks/pages/_app-26477814f4b13881.js  1.37 kB
  └ chunks/webpack-fd82975a6094609f.js     727 B·
○  (Static)  automatically rendered as static HTML (uses no initial props)·
warn  - Detected next.config.js, no exported configuration found. https://nextjs.org/docs/messages/empty-configuration
warn  - The Next.js plugin was not detected in your ESLint configuration. See https://nextjs.org/docs/basic-features/eslint#migrating-existing-config
"

  23 |   })
  24 |
> 25 |   it('should have shown errors during build', async () => {
     |                             ^
  26 |     expect(buildOutput).toMatch(
  27 |       /error.*The mandatory attribute 'height' is missing in tag 'amp-video'\./
  28 |     )

  at Object.<anonymous> (integration/amp-export-validation/test/index.test.js:25:29)

expect(received).toBe(expected) // Object.is equality

Expected: "PASS"
Received: {"i": "FAIL"}



  at Object.validateAMP (lib/amp-test-utils.js:26:27)
  at integration/amp-export-validation/test/index.test.js:35:13
      at async Promise.all (index 1)
  at Object.<anonymous> (integration/amp-export-validation/test/index.test.js:33:9)

expect(received).toBe(expected) // Object.is equality

Expected: "PASS"
Received: {"i": "FAIL"}



  at Object.validateAMP (lib/amp-test-utils.js:26:27)
  at Object.<anonymous> (integration/amphtml-fragment-style/test/index.test.js:32:9)

expect(received).not.toContain(expected) // indexOf

Expected substring: not "error"
Received string:        "warn  - You have enabled experimental feature(s).
warn  - Experimental features are not covered by semver, and may cause unexpected or broken application behavior. Use them at your own risk.

warn  - Amp Validation

/  warn  The native JavaScript AMPHTML Validator (validator.js) has been turned down. If you are seeing this error, update your tooling to instead load the API compatible WebAssembly AMPHTML Validator (validator_wasm.js) instead.

"

  25 |     const html = await renderViaHTTP(appPort, '/')
  26 |     await killApp(app)
> 27 |
     | ^
  28 |     expect(html).toContain('Hello from AMP')
  29 |   })
  30 |

  at Object.<anonymous> (integration/amphtml-custom-validator/test/index.test.js:27:28)