When npm test is executed, an error is encountered during the execution of Protractor with

Encountered an error while running protractor tests in visual studio code using npm test. The issue seems to be related to 

node_modules/@types/jasmine/index.d.ts
. How can this error be resolved?

C:\MyFiles\NewTechonologies\Protractor\TypeScript\Test>npm test

> <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="214459404c514d440c5558514452425348515561100f110f11">[email protected]</a> pretest C:\MyFiles\NewTechonologies\Protractor\TypeScript\Test
> npm run tsc


> <a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="c2a7baa3afb2aea7efb6bbb2a7b1a1b0abb2b682f3ecf2ecf2">[email protected]</a> tsc C:\MyFiles\NewTechonologies\Protractor\TypeScript\Test
> tsc

node_modules/@types/jasmine/index.d.ts(26,41): error TS2314: Generic type 'Matchers<T>' requires 1 type argument(s).
...
(snip)
...

node_modules/@types/jasminewd2/index.d.ts(48,20): error TS2304: Cannot find name 'Expected'.
node_modules/@types/jasminewd2/index.d.ts(49,23): error TS2304: Cannot find name 'Expected'.

npm ERR! Windows_NT 6.1.7601
npm ERR! (additional error messages)

Provided below are the files utilized for executing protractor with typescript and jasmine framework in visual studio code:

package.json

{
  "name": "example-typescript",
  "version": "1.0.0",
  "description": "a typescript example",
  "author": "",
  "license": "MIT",
  "scripts": {
    (script content)
  },
  "dependencies": {
    (dependency details)
  },
  "devDependencies": {
    (dev dependency details)
  }
}

spec.ts

(typescript code snippet)

tsconfig.json

(typescript configuration details)
typescriptnpmjasmineprotractor

Answer №1

I encountered a similar problem and was able to resolve it by taking the following steps:

1) I updated "@types/jasmine": "2.5.41" to "@types/jasmine": "^2.5.51" and "typescript": "~2.0.0" to "typescript": "2.1"

2) After running npm install && npm test, I encountered a new error, which led me to the next two actions.

3) I ran node_modules/.bin/webdriver-manager update

4) I commented out the line in conf.ts that read 

seleniumAddress: 'http://localhost:4444/wd/hub',

5) Finally, I reran npm test and found that everything was working as expected.

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