Add unit tests - validateIfDateInFuture

src/client/modules/Tasks/TaskForm/__test__/validators.test.js

@@ -0,0 +1,63 @@
+import { addDays, subDays, format } from 'date-fns'
+
+import { validateIfDateInFuture } from '../validators'
+
+describe('validateIfDateInFuture', () => {
+  it('should return null for a date in the future (with day provided)', () => {
+    const futureDate = addDays(new Date(), 10)
+    const year = format(futureDate, 'yyyy')
+    const month = format(futureDate, 'MM')
+    const day = format(futureDate, 'dd')
+
+    const result = validateIfDateInFuture({ year, month, day })
+    expect(result).to.be.null
+  })
+
+  it('should return null for a date in the future (year and month only)', () => {
+    const futureDate = addDays(new Date(), 40) // Ensures crossing month boundary
+    const year = format(futureDate, 'yyyy')
+    const month = format(futureDate, 'MM')
+
+    const result = validateIfDateInFuture({ year, month })
+    expect(result).to.be.null
+  })
+
+  it('should return error message for a past date (with day provided)', () => {
+    const pastDate = subDays(new Date(), 10)
+    const year = format(pastDate, 'yyyy')
+    const month = format(pastDate, 'MM')
+    const day = format(pastDate, 'dd')
+
+    const result = validateIfDateInFuture({ year, month, day })
+    expect(result).to.equal('Enter a date in the future')
+  })
+
+  it('should return error message for a past date (year and month only)', () => {
+    const pastDate = subDays(new Date(), 40)
+    const year = format(pastDate, 'yyyy')
+    const month = format(pastDate, 'MM')
+
+    const result = validateIfDateInFuture({ year, month })
+    expect(result).to.equal('Enter a date in the future')
+  })
+
+  it('should handle edge cases correctly (today is not in the future)', () => {
+    const today = new Date()
+    const year = format(today, 'yyyy')
+    const month = format(today, 'MM')
+    const day = format(today, 'dd')
+
+    const result = validateIfDateInFuture({ year, month, day })
+    expect(result).to.equal('Enter a date in the future')
+  })
+
+  it('should handle invalid inputs gracefully', () => {
+    const invalidMessage = 'Enter a date in the future'
+
+    expect(validateIfDateInFuture({})).to.equal(invalidMessage)
+    expect(validateIfDateInFuture({ year: '2025' })).to.equal(invalidMessage)
+    expect(validateIfDateInFuture({ year: '2025', month: '13' })).to.equal(
+      invalidMessage
+    )
+  })
+})