Handle validation for YYYY-MM-DD format

Author: lpsinger

src/components/forms/DatePicker/DatePicker.tsx

@@ -97,7 +97,12 @@ export const DatePicker = ({
   const parsedRangeDate = rangeDate ? parseDateString(rangeDate) : undefined
 
   const validateInput = (): void => {
-    const isInvalid = isDateInvalid(externalValue, parsedMinDate, parsedMaxDate)
+    const isInvalid = isDateInvalid(
+      externalValue,
+      dateFormat,
+      parsedMinDate,
+      parsedMaxDate
+    )
 
     if (isInvalid && !externalInputEl?.current?.validationMessage) {
       externalInputEl?.current?.setCustomValidity(VALIDATION_MESSAGE)
@@ -134,7 +139,10 @@ export const DatePicker = ({
 
     const inputDate = parseDateString(value, dateFormat, true)
     let newValue = ''
-    if (inputDate && !isDateInvalid(value, parsedMinDate, parsedMaxDate)) {
+    if (
+      inputDate &&
+      !isDateInvalid(value, dateFormat, parsedMinDate, parsedMaxDate)
+    ) {
       newValue = formatDate(inputDate)
     }
 

src/components/forms/DatePicker/utils.test.ts

@@ -81,34 +81,63 @@ describe('formatDate', () => {
 })
 
 describe('isDateInvalid', () => {
-  it('returns false if the date is within the min & max', () => {
-    const testMin = new Date('May 1, 1988')
-    const testMax = new Date('June 1, 1988')
-    expect(isDateInvalid('05/16/1988', testMin, testMax)).toEqual(false)
-  })
-
-  it('returns true if the date is not within the min & max', () => {
-    const testMin = new Date('May 1, 1988')
-    const testMax = new Date('June 1, 1988')
-    expect(isDateInvalid('08/16/1988', testMin, testMax)).toEqual(true)
-  })
-
-  it('returns true if the date is not valid', () => {
-    const testMin = new Date('May 1, 1988')
-    const testMax = new Date('June 1, 1988')
-    expect(isDateInvalid('not a date', testMin, testMax)).toEqual(true)
-  })
+  it.each([
+    ['05/16/1988', DEFAULT_EXTERNAL_DATE_FORMAT],
+    ['1988-05-16', INTERNAL_DATE_FORMAT],
+  ] as const)(
+    'returns false if the date is within the min & max',
+    (date, format) => {
+      const testMin = new Date('May 1, 1988')
+      const testMax = new Date('June 1, 1988')
+      expect(isDateInvalid(date, format, testMin, testMax)).toEqual(false)
+    }
+  )
+
+  it.each([
+    ['08/16/1988', DEFAULT_EXTERNAL_DATE_FORMAT],
+    ['1988-08-16', INTERNAL_DATE_FORMAT],
+  ] as const)(
+    'returns true if the date is not within the min & max',
+    (date, format) => {
+      const testMin = new Date('May 1, 1988')
+      const testMax = new Date('June 1, 1988')
+      expect(isDateInvalid(date, format, testMin, testMax)).toEqual(true)
+    }
+  )
+
+  it.each([DEFAULT_EXTERNAL_DATE_FORMAT, INTERNAL_DATE_FORMAT] as const)(
+    'returns true if the date is not valid',
+    (format) => {
+      const testMin = new Date('May 1, 1988')
+      const testMax = new Date('June 1, 1988')
+      expect(isDateInvalid('not a date', format, testMin, testMax)).toEqual(
+        true
+      )
+    }
+  )
 
   describe('with no max date', () => {
-    it('returns false if the date is after the min', () => {
-      const testMin = new Date('May 1, 1988')
-      expect(isDateInvalid('05/16/1988', testMin)).toEqual(false)
-    })
+    it.each([
+      ['05/16/1988', DEFAULT_EXTERNAL_DATE_FORMAT],
+      ['1988-05-16', INTERNAL_DATE_FORMAT],
+    ] as const)(
+      'returns false if the date is after the min',
+      (date, format) => {
+        const testMin = new Date('May 1, 1988')
+        expect(isDateInvalid(date, format, testMin)).toEqual(false)
+      }
+    )
 
-    it('returns true if the date is not after the min', () => {
-      const testMin = new Date('May 1, 1988')
-      expect(isDateInvalid('02/16/1988', testMin)).toEqual(true)
-    })
+    it.each([
+      ['02/16/1988', DEFAULT_EXTERNAL_DATE_FORMAT],
+      ['1988-02-16', INTERNAL_DATE_FORMAT],
+    ] as const)(
+      'returns true if the date is not after the min',
+      (date, format) => {
+        const testMin = new Date('May 1, 1988')
+        expect(isDateInvalid(date, format, testMin)).toEqual(true)
+      }
+    )
   })
 })
 

src/components/forms/DatePicker/utils.tsx

@@ -460,6 +460,7 @@ export const formatDate = (
 
 export const isDateInvalid = (
   dateString: string,
+  dateFormat: DateFormat,
   minDate: Date,
   maxDate?: Date
 ): boolean => {
@@ -468,22 +469,33 @@ export const isDateInvalid = (
   if (dateString) {
     isInvalid = true
 
-    const dateStringParts = dateString.split('/')
-    const [month, day, year] = dateStringParts.map((str) => {
+    const dateStringParts = dateString.split(
+      dateFormat === DEFAULT_EXTERNAL_DATE_FORMAT ? '/' : '-'
+    )
+    const dateParts = dateStringParts.map((str) => {
       let value
       const parsed = parseInt(str, 10)
       if (!Number.isNaN(parsed)) value = parsed
       return value
     })
 
+    let month, day, year, yearStringPart
+    if (dateFormat === DEFAULT_EXTERNAL_DATE_FORMAT) {
+      yearStringPart = dateStringParts[2]
+      ;[month, day, year] = dateParts
+    } else {
+      yearStringPart = dateStringParts[0]
+      ;[year, month, day] = dateParts
+    }
+
     if (month && day && year != null) {
       const checkDate = setDate(year, month - 1, day)
 
       if (
         checkDate.getMonth() === month - 1 &&
         checkDate.getDate() === day &&
         checkDate.getFullYear() === year &&
-        dateStringParts[2].length === 4 &&
+        yearStringPart.length === 4 &&
         isDateWithinMinAndMax(checkDate, minDate, maxDate)
       ) {
         isInvalid = false