1 files changed, 102 insertions, 0 deletions
diff --git a/src/lib/hooks/__tests__/useTimeAgo.test.ts b/src/lib/hooks/__tests__/useTimeAgo.test.ts
new file mode 100644
index 000000000..e74f9c62d
--- /dev/null
+++ b/src/lib/hooks/__tests__/useTimeAgo.test.ts
@@ -0,0 +1,102 @@
+import {describe, expect, it} from '@jest/globals'
+import {MessageDescriptor} from '@lingui/core'
+import {addDays, subDays, subHours, subMinutes, subSeconds} from 'date-fns'
+
+import {dateDiff} from '../useTimeAgo'
+
+const lingui: any = (obj: MessageDescriptor) => obj.message
+
+const base = new Date('2024-06-17T00:00:00Z')
+
+describe('dateDiff', () => {
+  it(`works with numbers`, () => {
+    expect(dateDiff(subDays(base, 3), Number(base), {lingui})).toEqual('3d')
+  })
+  it(`works with strings`, () => {
+    expect(dateDiff(subDays(base, 3), base.toString(), {lingui})).toEqual('3d')
+  })
+  it(`works with dates`, () => {
+    expect(dateDiff(subDays(base, 3), base, {lingui})).toEqual('3d')
+  })
+
+  it(`equal values return now`, () => {
+    expect(dateDiff(base, base, {lingui})).toEqual('now')
+  })
+  it(`future dates return now`, () => {
+    expect(dateDiff(addDays(base, 3), base, {lingui})).toEqual('now')
+  })
+
+  it(`values < 5 seconds ago return now`, () => {
+    const then = subSeconds(base, 4)
+    expect(dateDiff(then, base, {lingui})).toEqual('now')
+  })
+  it(`values >= 5 seconds ago return seconds`, () => {
+    const then = subSeconds(base, 5)
+    expect(dateDiff(then, base, {lingui})).toEqual('5s')
+  })
+
+  it(`values < 1 min return seconds`, () => {
+    const then = subSeconds(base, 59)
+    expect(dateDiff(then, base, {lingui})).toEqual('59s')
+  })
+  it(`values >= 1 min return minutes`, () => {
+    const then = subSeconds(base, 60)
+    expect(dateDiff(then, base, {lingui})).toEqual('1m')
+  })
+  it(`minutes round down`, () => {
+    const then = subSeconds(base, 119)
+    expect(dateDiff(then, base, {lingui})).toEqual('1m')
+  })
+
+  it(`values < 1 hour return minutes`, () => {
+    const then = subMinutes(base, 59)
+    expect(dateDiff(then, base, {lingui})).toEqual('59m')
+  })
+  it(`values >= 1 hour return hours`, () => {
+    const then = subMinutes(base, 60)
+    expect(dateDiff(then, base, {lingui})).toEqual('1h')
+  })
+  it(`hours round down`, () => {
+    const then = subMinutes(base, 119)
+    expect(dateDiff(then, base, {lingui})).toEqual('1h')
+  })
+
+  it(`values < 1 day return hours`, () => {
+    const then = subHours(base, 23)
+    expect(dateDiff(then, base, {lingui})).toEqual('23h')
+  })
+  it(`values >= 1 day return days`, () => {
+    const then = subHours(base, 24)
+    expect(dateDiff(then, base, {lingui})).toEqual('1d')
+  })
+  it(`days round down`, () => {
+    const then = subHours(base, 47)
+    expect(dateDiff(then, base, {lingui})).toEqual('1d')
+  })
+
+  it(`values < 30 days return days`, () => {
+    const then = subDays(base, 29)
+    expect(dateDiff(then, base, {lingui})).toEqual('29d')
+  })
+  it(`values >= 30 days return months`, () => {
+    const then = subDays(base, 30)
+    expect(dateDiff(then, base, {lingui})).toEqual('1mo')
+  })
+  it(`months round down`, () => {
+    const then = subDays(base, 59)
+    expect(dateDiff(then, base, {lingui})).toEqual('1mo')
+  })
+  it(`values are rounded by increments of 30`, () => {
+    const then = subDays(base, 61)
+    expect(dateDiff(then, base, {lingui})).toEqual('2mo')
+  })
+
+  it(`values < 360 days return months`, () => {
+    const then = subDays(base, 359)
+    expect(dateDiff(then, base, {lingui})).toEqual('11mo')
+  })
+  it(`values >= 360 days return the earlier value`, () => {
+    const then = subDays(base, 360)
+    expect(dateDiff(then, base, {lingui})).toEqual(then.toLocaleDateString())
+  })
+})