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Jest - Could not locate module with dynamic import template string


By : linwuhen
Date : October 18 2020, 06:10 AM
I wish this help you here's how I fixed it, the problem is that Jest for some reason, it complains when using template literals inside the dynamic import. so to fix it just use normal string concatenation and that's it.
code :
(async () => {
  // $FlowIgnore
  const icon = await import('@/assets/svg/icons/' + name + '.svg');
  setIconPath(icon.default);
})();


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python dynamic from module import function by string


By : ScottCLo
Date : March 29 2020, 07:55 AM
it helps some times __import__ is a builtin function which takes the module name as a string and returns the module as an object. See the documentation:
code :
__import__(name[, globals[, locals[, fromlist[, level]]]])

How can I mock an ES6 module import using Jest?


By : Michael Burkhardt
Date : March 29 2020, 07:55 AM
it helps some times I've been able to solve this by using a hack involving import *. It even works for both named and default exports!
For a named export:
code :
// dependency.js
export const doSomething = (y) => console.log(y)

// myModule.js
import { doSomething } from './dependency';

export default (x) => {
  doSomething(x * 2);
}

// myModule-test.js
import myModule from '../myModule';
import * as dependency from '../dependency';

describe('myModule', () => {
  it('calls the dependency with double the input', () => {
    dependency.doSomething = jest.fn(); // Mutate the named export

    myModule(2);

    expect(dependency.doSomething).toBeCalledWith(4);
  });
});
// dependency.js
export default (y) => console.log(y)

// myModule.js
import dependency from './dependency'; // Note lack of curlies

export default (x) => {
  dependency(x * 2);
}

// myModule-test.js
import myModule from '../myModule';
import * as dependency from '../dependency';

describe('myModule', () => {
  it('calls the dependency with double the input', () => {
    dependency.default = jest.fn(); // Mutate the default export

    myModule(2);

    expect(dependency.default).toBeCalledWith(4); // Assert against the default
  });
});

Jest Could not locate module FileName.css (mapped as identity-obj-proxy)


By : حمی زنكنة
Date : March 29 2020, 07:55 AM
Hope this helps I've been trying to set up a testing environment for my React project and I had a problem with Unexpected token when importing the CSS file. i added the moduleNameMapper to the package.json to fix it and now i'm facing this issue. Does anyone know what can i do to fix this? , make sure you have identity-obj-proxy in your devDependencies
code :
"devDependencies": {
  "identity-obj-proxy": "^3.0.0",
  ...
}
npm install --save-dev identity-obj-proxy

Jest error Could not locate module .... mapped as:


By : user3048137
Date : March 29 2020, 07:55 AM
With these it helps I try use Jest with VueJS and Quasar framework. I write simple test: , I wrote this:
code :
import GetUserDictionaryDataComponent from '@/pages/configurations/components/GetUserDictionaryDataComponent';
import Component from '@/pages/configurations/components/Component';

jest could not locate module by using main entry point


By : nmt
Date : March 29 2020, 07:55 AM
around this issue Test to edit the main key in package.json to not start with '/'. That might cause trouble for jest.
Example package.json:
code :
{
  "name": "@pipe-dream/core",
  "main": "dist/pipe-dream.js",
  ...
}
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