test: Add unit test (#20)

package.json

@@ -8,7 +8,9 @@
     "lint": "eslint ./app.js routes",
     "format": "eslint --fix . bin --ignore public node_modules",
     "test:integration": "jest test/integration",
-    "test:integration:watch": "jest test/integration --watch"
+    "test:integration:watch": "jest test/integration --watch",
+    "test:unit": "jest test/unit",
+    "test:unit:watch": "jest test/unit --watch"
   },
   "engines": {
     "node": ">=8.4.0"

test/unit/index.test.js

@@ -0,0 +1,92 @@
+/* global describe, test, beforeAll, afterEach, jest, expect */
+const { getCourses, getCourse, getCoursesByCategory, getLesson } = require('../../routes/courses')
+const { getSettings } = require('../../routes/settings')
+const { mockCourse, mockCategory } = require('./mocks/index')
+
+jest.mock('../../services/contentful')
+const contentful = require('../../services/contentful')
+
+const req = {}
+const res = {
+  locals: {
+    currentLocale: {
+      code: 'en-US'
+    },
+    currentApi: {
+      id: 'cda'
+    }
+  }
+}
+
+beforeAll(() => {
+  contentful.getCourses.mockImplementation(() => [mockCourse])
+  contentful.getCourse.mockImplementation(() => mockCourse)
+
+  contentful.getCategories.mockImplementation(() => [mockCategory])
+
+  contentful.getCoursesByCategory.mockImplementation(() => [])
+  res.render = jest.fn()
+  res.cookie = jest.fn()
+  req.cookies = { visitedLessons: [] }
+})
+
+afterEach(() => {
+  res.render.mockClear()
+  res.render.mockReset()
+})
+
+describe('Courses', () => {
+  test('it should courses list once', async () => {
+    await getCourses(req, res)
+    expect(res.render.mock.calls[0][0]).toBe('courses')
+    expect(res.render.mock.calls[0][1].title).toBe('All Courses (1)')
+    expect(res.render.mock.calls[0][1].courses.length).toBe(1)
+    expect(res.render.mock.calls.length).toBe(1)
+  })
+
+  test('it should render single course once', async () => {
+    req.params = {slug: 'slug', lslug: 'lessonSlug'}
+    await getCourse(req, res)
+    expect(res.render.mock.calls[0][0]).toBe('course')
+    expect(res.render.mock.calls[0][1].title).toBe(mockCourse.fields.title)
+    expect(res.render.mock.calls[0][1].course.sys.id).toBe(mockCourse.sys.id)
+    expect(res.render.mock.calls[0][1].lesson.sys.id).toBe(mockCourse.fields.lessons[0].sys.id)
+    expect(res.render.mock.calls.length).toBe(1)
+  })
+  test('it should render list of courses by categories', async () => {
+    req.params = {slug: 'slug', lslug: 'lslug', category: 'categorySlug'}
+    await getCoursesByCategory(req, res)
+    expect(res.render.mock.calls[0][0]).toBe('courses')
+    expect(res.render.mock.calls[0][1].title).toBe(`${mockCategory.fields.title} (0)`)
+    expect(res.render.mock.calls.length).toBe(1)
+  })
+})
+
+describe('Lessons', () => {
+  test('it should render a lesson', async () => {
+    req.params = { cslug: 'courseSlug', lslug: 'lessonSlug' }
+    await getLesson(req, res)
+    expect(res.render.mock.calls[0][0]).toBe('course')
+    expect(res.render.mock.calls[0][1].title).toBe('Course title | Lesson title')
+    expect(res.render.mock.calls[0][1].course.sys.id).toBe(mockCourse.sys.id)
+    expect(res.render.mock.calls[0][1].lesson.sys.id).toBe(mockCourse.fields.lessons[0].sys.id)
+    expect(res.render.mock.calls.length).toBe(1)
+  })
+})
+
+describe('Settings', () => {
+  test('It should render settings', async () => {
+    res.locals = {
+      settings: {
+        space: 'spaceId',
+        cda: 'cda',
+        cpa: 'cpa',
+        editorialFeatures: false
+      }
+    }
+    await getSettings(req, res)
+    expect(res.render.mock.calls[0][0]).toBe('settings')
+    expect(res.render.mock.calls[0][1].title).toBe('Settings')
+    expect(res.render.mock.calls[0][1].settings).toBe(res.locals.settings)
+  })
+})

test/unit/mocks/index.js

@@ -0,0 +1,24 @@
+const mockCourse = {
+  sys: { id: 'courseId' },
+  fields: {
+    title: 'Course title',
+    lessons: [
+      { sys: {id: 'lessonId'}, fields: { slug: 'lessonSlug', title: 'Lesson title' } }
+    ]
+  }
+}
+
+const mockCategory = {
+  sys: {
+    id: 'categoryId'
+  },
+  fields: {
+    slug: 'categorySlug',
+    title: 'categoryTitle'
+  }
+}
+
+module.exports = {
+  mockCourse,
+  mockCategory
+}