Jest test are failing with zipcelx

[dmitry-urenev]

Hi guys, great library, I have the following error. My jest tests are failing with following error:

Test suite failed to run

    /node_modules/zipcelx/lib/module.js:1
    ({"Object.<anonymous>":function(module,exports,require,__dirname,__filename,global,jest){import escape from 'lodash.escape';
                                                                                                    ^^^^^^

    SyntaxError: Unexpected identifier

      1 | ....
    > 2 | import zipcelx, { ZipCelXCell, ZipCelXConfig, ZipCelXRow } from 'zipcelx';
        | ^

My setup: Angular 7 + Jest + zipcelx
package.json with all required dependencies for zipcelx and jest config looks like this:

dependencies: {
    ...
    "zipcelx": "^1.6.0",
    "jszip": "^3.1.3",
    "lodash.escape": "^4.0.1",
    "stream": "^0.0.2"
},
 "jest": {
    "verbose": true,
    "testURL": "http://localhost/",
    "preset": "jest-preset-angular",
    "setupTestFrameworkScriptFile": "<rootDir>/src/setupJest.ts",
    "transformIgnorePatterns": [
      "node_modules/(?!@ngrx)"
    ],
    "transform": {
      "^.+\\.(ts|html)$": "<rootDir>/node_modules/jest-preset-angular/preprocessor.js",
      "^.+\\.js$": "babel-jest"
    }
}

The interesting thing is that the production build/serve works nice. Also when I ran it with ng serve everything worked and it produced the correct xlsx file, which would solve all my problems. Only tests are failing. Any ideas what I might be missing?

[dmitry-urenev]

resolved by adding zipcelx to transformIgnorePatterns config:

"jest": {
    "verbose": true,
    "testURL": "http://localhost/",
    "preset": "jest-preset-angular",
    "setupTestFrameworkScriptFile": "<rootDir>/src/setupJest.ts",
    "transformIgnorePatterns": [
      "node_modules/(?!@ngrx|zipcelx)"
    ],
    "transform": {
      "^.+\\.(ts|html)$": "<rootDir>/node_modules/jest-preset-angular/preprocessor.js",
      "^.+\\.js$": "babel-jest"
    }
}

Related issues: jestjs/jest#2081