add test for time,js module #27

tests/unit/time.spec.js

@@ -0,0 +1,30 @@
+import { expect } from 'chai'
+import time from '@/time'
+
+describe('time.js', () => {
+  it('getPeriod', () => {
+    // 1.01.2021 13:00:00 000
+    let start = new Date(2021, 0, 1, 13, 0, 0, 0)
+
+    // 3.01.2021 22:15:20 500
+    let end = new Date(2021, 0, 3, 22, 15, 20, 500)
+
+    expect(time.getPeriod(start, end)).to.equal('2 d 9 h 15 m 20 s 500 ms')
+
+    // 1.01.2021 13:00:00 000
+    start = new Date(2021, 0, 1, 13, 0, 0, 0)
+
+    // 1.01.2021 22:00:20 000
+    end = new Date(2021, 0, 1, 22, 0, 20, 0)
+
+    expect(time.getPeriod(start, end)).to.equal('9 h 20 s')
+
+    // 1.01.2021 13:00:00 000
+    start = new Date(2021, 0, 1, 13, 0, 0, 0)
+
+    // 1.01.2021 13:00:00 45
+    end = new Date(2021, 0, 1, 13, 0, 0, 45)
+
+    expect(time.getPeriod(start, end)).to.equal('45 ms')
+  })
+})