@defra-fish/gafl-webapp-service/src/__tests__/gafl-webapp-service.spec.js

The websales frontend for the GAFL service

describe('gafl-web-service', () => {
  it('runs initialisation', done => {
    jest.isolateModules(() => {
      try {
        jest.mock('../server.js')
        const { createServer, init, shutdownBehavior } = require('../server.js')
        createServer.mockImplementation(() => {})
        init.mockImplementation(() => Promise.resolve())
        shutdownBehavior.mockImplementation(() => {})
        require('../gafl-webapp-service')
        setImmediate(() => {
          expect(createServer).toHaveBeenCalled()
          expect(init).toHaveBeenCalled()
          expect(shutdownBehavior).toHaveBeenCalled()
          done()
        })
      } catch (e) {
        done(e)
      }
    })
  })

  it('has initialisation failure', done => {
    jest.isolateModules(() => {
      try {
        jest.mock('../server.js')
        const { createServer, init, shutdownBehavior } = require('../server.js')
        createServer.mockImplementation(() => {})
        init.mockImplementation(() => Promise.reject(new Error()))
        shutdownBehavior.mockImplementation(() => {})
        const processExitSpy = jest.spyOn(process, 'exit').mockImplementation(code => {})
        require('../gafl-webapp-service')
        setImmediate(() => {
          expect(init).toHaveBeenCalled()
          expect(createServer).toHaveBeenCalled()
          expect(shutdownBehavior).not.toHaveBeenCalled()
          expect(processExitSpy).toHaveBeenCalledWith(1)
          done()
        })
      } catch (e) {
        done(e)
      }
    })
  })
})