Unit tests added

tests/lib/themeManager-test.js

@@ -0,0 +1,93 @@
+/**
+ * @fileoverview Unit test for browser/main/lib/ThemeManager.js
+ */
+const test = require('ava')
+const { chooseTheme, applyTheme } = require('browser/main/lib/ThemeManager')
+
+const originalDate = Date
+
+test.beforeEach(t => {
+  t.context = {
+    theme: 'white',
+    scheduledTheme: 'dark',
+    enableScheduleTheme: true,
+    defaultTheme: 'monokai'
+  }
+  const constantDate = new Date('2017-11-27T14:33:42Z')
+  global.Date = class extends Date {
+    constructor () {
+      super()
+      return constantDate
+    }
+  }
+})
+
+test.afterEach(t => {
+  global.Date = originalDate
+})
+
+test('enableScheduleTheme is false, theme shouldn\'t change', t => {
+  t.context.enableScheduleTheme = false
+
+  const beforeTheme = t.context.theme
+  chooseTheme(t.context)
+  const afterTheme = t.context.theme
+
+  t.is(afterTheme, beforeTheme)
+})
+
+// NOT IN SCHEDULE
+test('scheduleEnd is bigger than scheduleStart and not in schedule, theme shouldn\'t change', t => {
+  const beforeTheme = t.context.defaultTheme
+  t.context.scheduleStart = 720 // 12:00
+  t.context.scheduleEnd = 870 // 14:30
+  chooseTheme(t.context)
+  const afterTheme = t.context.theme
+
+  t.is(afterTheme, beforeTheme)
+})
+
+test('scheduleStart is bigger than scheduleEnd and not in schedule, theme shouldn\'t change', t => {
+  const beforeTheme = t.context.defaultTheme
+  t.context.scheduleStart = 960 // 16:00
+  t.context.scheduleEnd = 600 // 10:00
+  chooseTheme(t.context)
+  const afterTheme = t.context.theme
+
+  t.is(afterTheme, beforeTheme)
+})
+
+// IN SCHEDULE
+test('scheduleEnd is bigger than scheduleStart and in schedule, theme should change', t => {
+  const beforeTheme = t.context.scheduledTheme
+  t.context.scheduleStart = 720 // 12:00
+  t.context.scheduleEnd = 900 // 15:00
+  chooseTheme(t.context)
+  const afterTheme = t.context.theme
+
+  t.is(afterTheme, beforeTheme)
+})
+
+test('scheduleStart is bigger than scheduleEnd and in schedule, theme should change', t => {
+  const beforeTheme = t.context.scheduledTheme
+  t.context.scheduleStart = 1200 // 20:00
+  t.context.scheduleEnd = 900 // 15:00
+  chooseTheme(t.context)
+  const afterTheme = t.context.theme
+
+  t.is(afterTheme, beforeTheme)
+})
+
+test('theme to apply is not a supported theme, theme shouldn\'t change', t => {
+  applyTheme('notATheme')
+  const afterTheme = document.body.dataset.theme
+
+  t.is(afterTheme, 'default')
+})
+
+test('theme to apply is a supported theme, theme should change', t => {
+  applyTheme(t.context.defaultTheme)
+  const afterTheme = document.body.dataset.theme
+
+  t.is(afterTheme, t.context.defaultTheme)
+})