json-server/test/server/validate-data.js

const assert = require('assert')
const validateData = require('../../src/server/router/validate-data')

describe('validateData', () => {
  it('should throw an error if data contains /', () => {
    assert.throws(
      () => validateData({ 'a/b': [] }),
      /found \//
    )
  })

  it('should throw an error if data is an array', () => {
    assert.throws(
      () => validateData([]),
      /must be an object/
    )
  })

  it('shouldn\'t throw an error', () => {
    assert.doesNotThrow(
      () => validateData({ a: [] })
    )
  })
})