Overleaf/services/clsi/test/unit/js/OutputControllerTests.js

const SandboxedModule = require('sandboxed-module')
const sinon = require('sinon')
const MODULE_PATH = require('node:path').join(
  __dirname,
  '../../../app/js/OutputController'
)

describe('OutputController', function () {
  describe('createOutputZip', function () {
    beforeEach(function () {
      this.archive = {}

      this.pipeline = sinon.stub().resolves()

      this.archiveFilesForBuild = sinon.stub().resolves(this.archive)

      this.OutputController = SandboxedModule.require(MODULE_PATH, {
        requires: {
          './OutputFileArchiveManager': {
            archiveFilesForBuild: this.archiveFilesForBuild,
          },
          'stream/promises': {
            pipeline: this.pipeline,
          },
        },
      })
    })

    describe('when OutputFileArchiveManager creates an archive', function () {
      beforeEach(function (done) {
        this.res = {
          attachment: sinon.stub(),
          setHeader: sinon.stub(),
        }
        this.req = {
          params: {
            project_id: 'project-id-123',
            user_id: 'user-id-123',
            build_id: 'build-id-123',
          },
          query: {
            files: ['output.tex'],
          },
        }
        this.pipeline.callsFake(() => {
          done()
          return Promise.resolve()
        })
        this.OutputController.createOutputZip(this.req, this.res)
      })

      it('creates a pipeline from the archive to the response', function () {
        sinon.assert.calledWith(this.pipeline, this.archive, this.res)
      })

      it('calls the express convenience method to set attachment headers', function () {
        sinon.assert.calledWith(this.res.attachment, 'output.zip')
      })

      it('sets the X-Content-Type-Options header to nosniff', function () {
        sinon.assert.calledWith(
          this.res.setHeader,
          'X-Content-Type-Options',
          'nosniff'
        )
      })
    })

    describe('when OutputFileArchiveManager throws an error', function () {
      let error

      beforeEach(function (done) {
        error = new Error('error message')

        this.archiveFilesForBuild.rejects(error)

        this.res = {
          status: sinon.stub().returnsThis(),
          send: sinon.stub(),
        }
        this.req = {
          params: {
            project_id: 'project-id-123',
            user_id: 'user-id-123',
            build_id: 'build-id-123',
          },
          query: {
            files: ['output.tex'],
          },
        }
        this.OutputController.createOutputZip(
          this.req,
          this.res,
          (this.next = sinon.stub().callsFake(() => {
            done()
          }))
        )
      })

      it('calls next with the error', function () {
        sinon.assert.calledWith(this.next, error)
      })
    })
  })
})