Intermezzo – NestJS + Jest vs Angular + Jasmine

Bingo

Bingo is a small project, written in TypeScript , and developed with Alexandru Badita in launch break (one hour - more or less). You can find sources at https://github.com/alexandru360/PresentationBingoCards/ . Those are my blog posts for Bingo : ( scroll below for the post)

Nr	Link
1	Create meeting
2	Create Tests
3	Finalize Create meeting
4	Sharing meeting
5	Keep Score
6	Add obsolete
7	Finalizing obsolete
8	End meeting
9	Dockerize tests
10	Azure CI tests
11	Yarn workspaces
12	CLI
13	Intermezzo - CLI improvements
14	typescript compile run with node
15	NestJS ,swagger and create a meeting
16	Finalizing API
17	Intermezzo - jest vs jasmine error
18	Refactor WebAPI and test service
19	Heroku Deploy NestJs
20	Angular
21	Deploy Angular to GitHub
22	WebAPI and Web
23	Documentation
24	Documentation of the code
25	Conclusions

We decided to add an Angular project.  As a immediate consequence , the compile ( tsc ) of the API ( bingo-cards-api) it failes with the first error being:

../node_modules/@types/jasmine/ts3.1/index.d.ts:16:1 – error TS6200: Definitions of the following identifiers conflict with those in another file: beforeAll, beforeEach, afterAll, afterEach, describe, fdescribe, xdescribe, it, fit, xit, expect, DEFAULT_TIMEOUT_INTERVAL, CustomMatcherFactory, CustomEqualityTester

 

Obviously, we have a conflict… And the conflict is done by Angular( that comes with Jasmine by default) and Nest ( that comes with Jest) ( and us, that we have choose Jest)

 

There are 3 solving paths:

1. Convert all to Jasmine
2. Convert all to Jest
3. Eliminate the tests from the Angular , eliminate the tests from Nest and create the own library to test (we have done already this, in bingo-meeting-objects-test)

 

Solution 1 : means re-factor all. Not good.

I have tried the 2 , but , in spite of many tutorials on the internet, some problems have arrived.

So we have the 3 : eliminate all references to Jest and Jasmine, with the exception of bingo-meeting-objects-test

And… it worked!