fix: parsing date formats with leading and trailing spaces

Author: danielkaradachki

src/dates/parse-date.js

@@ -18,6 +18,9 @@ const numberRegExp = {
 const numberRegex = /\d+/;
 const PLACEHOLDER = "{0}";
 
+const leadingSpacesRegex = /^ +/;
+const trailingSpacesRegex = / +$/;
+
 const standardDateFormats = [
     "yyyy/MM/dd HH:mm:ss",
     "yyyy/MM/dd HH:mm",
@@ -456,13 +459,20 @@ function createDate(state) {
     return result;
 }
 
+function addFormatSpaces(value, format) {
+    const leadingSpaces = (leadingSpacesRegex.exec(format) || [])[0] || '';
+    const trailingSpaces = (trailingSpacesRegex.exec(format) || [])[0] || '';
+
+    return `${ leadingSpaces }${ value }${ trailingSpaces }`;
+}
+
 function parseExact(value, format, info) {
     let pattern = datePattern(format, info).split(EMPTY);
 
     const state = {
         format: pattern,
         idx: 0,
-        value: value,
+        value: addFormatSpaces(value, format),
         valueIdx: 0,
         year: null,
         month: null,

test/dates.js

@@ -459,6 +459,11 @@ describe('date parsing', () => {
         expect(parseDate("12/23/29", "M/d/yy").getFullYear(), 2029);
     });
 
+    it('prases formats with leading and trailing spaces', function () {
+        const result = parseDate("  12/23/2000 ", "  MM/dd/yyyy ");
+        expect(isValidDate(2000, 12, 23, result)).toBe(true);
+    });
+
     it('prases G format time', function () {
         const result = parseDate("12/23/2000 8:12:22 pm", "G");
         expect(isValidDateTime(result, 2000, 12, 23, 20, 12, 22)).toBe(true);