sarala-json-api-data-formatter/tests/common-methods.test.js

Simple and fluent framework agnostic javascript library to transform standard JSON API responses to simple JSON objects and vice versa.

import Formatter from './../src/Formatter'

let formatter = null

beforeEach(() => {
    formatter = new Formatter()
})

test('it initialize with clean properties', () => {
    expect(formatter.data).toEqual({})
    expect(formatter.includes).toBeNull()
    expect(formatter.fields).toBeNull()
})

test('includeOnly will set includes to be processed and returns chainable formatter object', () => {
    const includes = ['author', 'tags', 'comments']
    const chainable = formatter.includeOnly(includes)

    expect(chainable.includes).toEqual(includes)
    expect(chainable).toBeInstanceOf(Formatter)
})

test('filterFields will set fields to be processed and returns chainable formatter object', () => {
    const fields = {
        posts: ['title', 'subtitle'],
        tags: ['name']
    }

    const chainable = formatter.filterFields(fields)

    expect(chainable.fields).toEqual(fields)
    expect(chainable).toBeInstanceOf(Formatter)
})

test('shouldIncludeRelation verifies whether given relationship is in the includes list', () => {
    const includes = ['author', 'tags', 'comments']
    formatter.includeOnly(includes)

    expect(formatter.shouldIncludeRelation('tags')).toBeTruthy()
    expect(formatter.shouldIncludeRelation('unicorn')).toBeFalsy()
})