Unit testing using Jasmine and TypeScript

Question

I am trying to get a unit test written in Typescript using Jasmine to compile. With the following in my unit-test file, Resharper prompts me with a link to import types from jas

Answer 1

You could try a side-effect only import which brings in the @types/jasmine declaration and places the jasmine functions into the global scope so you don't need to prefix each call with jasmine. allowing a quick port from existing unit tests and still plays nice with webpack.

// tslint:disable-next-line:no-import-side-effect
import "jasmine";

describe("My Unit Test", () => { /* ... */ } );

Of course you still need to install jasmine and the typings:

$ npm i jasmine @types/jasmine --save-dev

But no need for specialized jasmine loaders for ts or node. Just run jasmine against the compiled js files:

$ node ./node_modules/jasmine/bin/jasmine.js --config=test/support/jasmine.json

Assuming your typescript files are within a "test" subdirectory compiling to bin/test and you have a test/support/jasmine.json with something like this:

{
    "spec_dir": "bin/test",
    "spec_files": [
      "**/*[sS]pec.js"
    ],
    "stopSpecOnExpectationFailure": false,
    "random": false
}

P.S. all of the above works on Windows too