Jasmine spyOn fails after moving to Webpack4


Jasmine spyOn fails after moving to Webpack4



Recently I'm migrating a project from webpack 3 -> 4. There's an issue wit karma/jasmine tests. In my test I want to import a TypeScript namespace object and mock it.


webpack


karma/jasmine


spyOn(AlertDialogModule, 'createAlertDialog')
.and.returnValue(
Promise.resolve(alertDialogMock)
);



But I have an error



Error: : createAlertDialog is not declared writable or has no
setter



I think, the reason is in how WP4 handles harmony exports


/******/ // define getter function for harmony exports
/******/ __webpack_require__.d = function(exports, name, getter) {
/******/ if(!__webpack_require__.o(exports, name)) {
/******/ Object.defineProperty(exports, name, {
/******/ configurable: false,
/******/ enumerable: true,
/******/ get: getter
/******/ });
/******/ }
/******/ };









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