fix: use specified pattern length for standalone formats

Author: danielkaradachki

src/dates/date-pattern.js

@@ -60,6 +60,13 @@ const DATE_OPTIONS_MAP = [ {
     specifier: "z"
 } ];
 
+const STAND_ALONE_SPECIFIERS = {
+    e: 'c',
+    E: 'c',
+    M: 'L',
+    Q: 'q'
+};
+
 const specifiersRegex = {};
 const resolvedFormats = {};
 
@@ -131,14 +138,18 @@ function findBestMatch(specifiers, availableFormats) {
     }
 
     result = result.replace("v", "z");
-    //need to check for standalone specifiers if only one specifier
+
     for (let idx = 0; idx < specifiersLength; idx++) {
-        if (bestMatches[idx] && bestMatches[idx] !== specifiers[idx]) {
-            result = result.replace(getSpecifierRegex(bestMatches[idx][0]), specifiers[idx]);
+        const bestMatch = bestMatches[idx];
+        if (bestMatch && bestMatch !== specifiers[idx]) {
+            const matchSpecifier = bestMatches[idx][0];
+            result = result.replace(getSpecifierRegex(matchSpecifier), specifiers[idx]);
+            if (STAND_ALONE_SPECIFIERS[matchSpecifier]) {
+                result = result.replace(getSpecifierRegex(STAND_ALONE_SPECIFIERS[matchSpecifier]), specifiers[idx]);
+            }
         }
     }
 
-
     return result;
 }
 

test/dates.js

@@ -312,6 +312,10 @@ describe('date formatting', () => {
         expect(formatDate(date(2000, 2, 10), { skeleton: "MMd" })).toEqual('02 10');
     });
 
+    it('replaces available format pattern with specified pattern', () => {
+        expect(formatDate(date(2000, 2, 10), { skeleton: "MMMM" })).toEqual('February');
+    });
+
     it('supports skeleton format if there is both date and time', () => {
         expect(formatDate(date(2000, 2, 10, 10, 30), { skeleton: "yMMMdhm" })).toEqual('Feb 10, 2000, 10:30 AM');
     });