configure to allow raw testing of individual files

[robbiemu]

Is your feature request related to a problem? Please describe.

I would like to be able to directly test individual files. When setting jest up on my own, I used to be able to: jest ./src/app/app.component.spec.ts

and this comes in handy especially in vscode where I might drag and drop the file directly to the terminal..

now that produces:

Determining test suites to run...
ngcc-jest-processor: running ngcc
FAIL  src/app/app.component.spec.ts
 AppComponent
   ✕ should create the app (3 ms)
   ✕ should have as title 'ang15-test' (6 ms)
   ✕ should render title (1 ms)

 ● AppComponent › should create the app

   Need to call TestBed.initTestEnvironment() first
...

likewise, I cannot call ng test directly with the filename:

ng test ./src/app/app.component.spec.ts

Error: Invalid values:
  Argument: project, Given: "./src/app/app.component.spec.ts", Choices: "ang15-test"

ng test -- ./src/app/app.component.spec.ts
Option '--' has been specified multiple times. The value './src/app/app.component.spec.ts' will be used.
Error: Schema validation failed with the following errors:
  Data path "/" must be array.

Describe the solution you'd like
A clear and concise description of what you want to happen.

I should be able to test specific files directly on the commandline, such as:

jest <filename>

Describe alternatives you've considered
As I've had that working in multiple repos before, I am sure I will be able to figure it out with modern angular 15 now. I just havent located the issue yet.