DR-750 Add back unit test suite

[Aish1990]

Steps:

• Update the current unit tests to make them run (and pass)
• Add CI integration to run unit tests of every Pull Request
• Add code-coverage checks to the CI
• Add more unit tests to achieve higher code coverage

Definition of done: Every Pull-Request should check that the unit tests are passing. The unit tests should achieve a high code coverage (70% or more).

[dmohns]

Hey @Aish1990 I updated the PR description to be more clear.

Could you address the failing linters?

[dmohns]

Hey @Aish1990 you have syntax errors in the YAML files. Could you please fix them?

[dmohns]

Please don't use file-wide eslint-disable. If you need to disable it, please do so for the line that cannot be fixed.

[Aish1990]

Sir, actually it's like left empty intentionally...

  IsISO31661Alpha2: jest.fn(() => (target: any, propertyKey: string) => {}),
  IsString: jest.fn(() => (target: any, propertyKey: string) => {}),
  IsEmail: jest.fn(() => (target: any, propertyKey: string) => {}),
  IsOptional: jest.fn(() => (target: any, propertyKey: string) => {}),
  IsArray: jest.fn(() => (target: any, propertyKey: string) => {}),
  IsNotEmpty: jest.fn(() => (target: any, propertyKey: string) => {}),

[dmohns]

I understand. But I'm talking about file-wide ignore.

Please use

jest.mock('class-validator', () => ({
  // eslint-disable-next-line no-empty-function
  IsISO31661Alpha2: jest.fn(() => (target: any, propertyKey: string) => {}),
  
  // eslint-disable-next-line no-empty-function
  IsString: jest.fn(() => (target: any, propertyKey: string) => {}),
  
  // eslint-disable-next-line no-empty-function
  IsEmail: jest.fn(() => (target: any, propertyKey: string) => {}),
  
  // eslint-disable-next-line no-empty-function
  IsOptional: jest.fn(() => (target: any, propertyKey: string) => {}),
  
  // eslint-disable-next-line no-empty-function
  IsArray: jest.fn(() => (target: any, propertyKey: string) => {}),
  
  // eslint-disable-next-line no-empty-function
  IsNotEmpty: jest.fn(() => (target: any, propertyKey: string) => {}),
}));

instead

[Aish1990]

Okay sir...