test: add test for relative timeago date formatting (#1903)

tests/unit/test-timeago.js

@@ -0,0 +1,40 @@
+/* global it describe */
+
+import assert from 'assert'
+import { formatTimeagoDate, formatTimeagoFutureDate } from '../../src/routes/_intl/formatTimeagoDate'
+
+describe('test-timeago.js', () => {
+  it('test past date', () => {
+    const now = Date.now()
+    assert.deepStrictEqual(formatTimeagoDate(now, now), 'just now')
+    assert.deepStrictEqual(formatTimeagoDate(now - 10 * 1000, now), '10 seconds ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 5 * 60 * 1000, now), '5 minutes ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 3 * 60 * 60 * 1000, now), '3 hours ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 6 * 24 * 60 * 60 * 1000, now), '6 days ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 7 * 24 * 60 * 60 * 1000, now), '1 week ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 4 * 7 * 24 * 60 * 60 * 1000, now), '4 weeks ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 2 * 31 * 24 * 60 * 60 * 1000, now), '2 months ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 365 * 24 * 60 * 60 * 1000, now), '1 year ago')
+    assert.deepStrictEqual(formatTimeagoDate(now - 2 * 365 * 24 * 60 * 60 * 1000, now), '2 years ago')
+  })
+
+  it('test future date', () => {
+    const now = Date.now()
+    assert.deepStrictEqual(formatTimeagoFutureDate(now, now), 'just now')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 10 * 1000, now), 'in 10 seconds')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 5 * 60 * 1000, now), 'in 5 minutes')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 3 * 60 * 60 * 1000, now), 'in 3 hours')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 6 * 24 * 60 * 60 * 1000, now), 'in 6 days')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 7 * 24 * 60 * 60 * 1000, now), 'in 1 week')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 4 * 7 * 24 * 60 * 60 * 1000, now), 'in 4 weeks')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 2 * 31 * 24 * 60 * 60 * 1000, now), 'in 2 months')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 365 * 24 * 60 * 60 * 1000, now), 'in 1 year')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now + 2 * 365 * 24 * 60 * 60 * 1000, now), 'in 2 years')
+  })
+
+  it('clamping', () => {
+    const now = Date.now()
+    assert.deepStrictEqual(formatTimeagoDate(now + 1000000, now), 'just now')
+    assert.deepStrictEqual(formatTimeagoFutureDate(now - 1000000, now), 'just now')
+  })
+})