test: Add tests for formatLocallyDistanceToNow* helpers

react/I18n/format.spec.jsx

@@ -1,4 +1,8 @@
-import { initFormat, formatLocallyDistanceToNow } from './format'
+import {
+  initFormat,
+  formatLocallyDistanceToNow,
+  formatLocallyDistanceToNowStrict
+} from './format'
 
 describe('initFormat', () => {
   beforeEach(() => {
@@ -36,4 +40,46 @@ describe('formatLocallyDistanceToNow', () => {
 
     expect(result).toEqual('about 2 hours')
   })
+
+  it('should formatDistanceToNow with very high value', () => {
+    const date = Date.now() + 42 * 24 * 60 * 60 * 1000
+
+    const result = formatLocallyDistanceToNow(date)
+
+    expect(result).toEqual('about 1 month')
+  })
+})
+
+describe('formatLocallyDistanceToNowStrict', () => {
+  it('should formatDistanceToNowStrict with small value', () => {
+    const date = Date.now() + 29 * 1000
+
+    const result = formatLocallyDistanceToNowStrict(date)
+
+    expect(result).toEqual('29 seconds')
+  })
+
+  it('should formatDistanceToNowStrict with medium value', () => {
+    const date = Date.now() + 2671 * 1000
+
+    const result = formatLocallyDistanceToNowStrict(date)
+
+    expect(result).toEqual('45 minutes')
+  })
+
+  it('should formatDistanceToNowStrict with high value', () => {
+    const date = Date.now() + 5371 * 1000
+
+    const result = formatLocallyDistanceToNowStrict(date)
+
+    expect(result).toEqual('1 hour')
+  })
+
+  it('should formatDistanceToNowStrict with very high value', () => {
+    const date = Date.now() + 42 * 24 * 60 * 60 * 1000
+
+    const result = formatLocallyDistanceToNowStrict(date)
+
+    expect(result).toEqual('1 month')
+  })
 })