feat(currencyFilter): add fractionSize as optional parameter

currencyFilter accepts number of decimals to round off to

Closes #3642
Closes #3461
Closes #3642
Closes #7922

Author: doshprompt

src/ng/filter/filters.js

@@ -11,6 +11,7 @@
  *
  * @param {number} amount Input to filter.
  * @param {string=} symbol Currency symbol or identifier to be displayed.
+ * @param {number=} fractionSize Number of decimal places to round the amount to.
  * @returns {string} Formatted number.
  *
  *
@@ -27,12 +28,14 @@
          <input type="number" ng-model="amount"> <br>
          default currency symbol ($): <span id="currency-default">{{amount | currency}}</span><br>
          custom currency identifier (USD$): <span>{{amount | currency:"USD$"}}</span>
+         no fractions (0): <span>{{amount | currency:"USD$":0}}</span>
        </div>
      </file>
      <file name="protractor.js" type="protractor">
        it('should init with 1234.56', function() {
          expect(element(by.id('currency-default')).getText()).toBe('$1,234.56');
          expect(element(by.binding('amount | currency:"USD$"')).getText()).toBe('USD$1,234.56');
+         expect(element(by.binding('amount | currency:"USD$":0')).getText()).toBe('USD$1,235');
        });
        it('should update', function() {
          if (browser.params.browser == 'safari') {
@@ -44,20 +47,28 @@
          element(by.model('amount')).sendKeys('-1234');
          expect(element(by.id('currency-default')).getText()).toBe('($1,234.00)');
          expect(element(by.binding('amount | currency:"USD$"')).getText()).toBe('(USD$1,234.00)');
+         expect(element(by.binding('amount | currency:"USD$":0')).getText()).toBe('(USD$1,234)');
        });
      </file>
    </example>
  */
 currencyFilter.$inject = ['$locale'];
 function currencyFilter($locale) {
   var formats = $locale.NUMBER_FORMATS;
-  return function(amount, currencySymbol){
-    if (isUndefined(currencySymbol)) currencySymbol = formats.CURRENCY_SYM;
+  return function(amount, currencySymbol, fractionSize){
+    if (isUndefined(currencySymbol)) {
+      currencySymbol = formats.CURRENCY_SYM;
+    }
+
+    if (isUndefined(fractionSize)) {
+      // TODO: read the default value from the locale file
+      fractionSize = 2;
+    }
 
     // if null or undefined pass it through
     return (amount == null)
         ? amount
-        : formatNumber(amount, formats.PATTERNS[1], formats.GROUP_SEP, formats.DECIMAL_SEP, 2).
+        : formatNumber(amount, formats.PATTERNS[1], formats.GROUP_SEP, formats.DECIMAL_SEP, fractionSize).
             replace(/\u00A4/g, currencySymbol);
   };
 }

test/ng/filter/filtersSpec.js

@@ -101,6 +101,7 @@ describe('filters', function() {
       expect(currency(0)).toEqual('$0.00');
       expect(currency(-999)).toEqual('($999.00)');
       expect(currency(1234.5678, "USD$")).toEqual('USD$1,234.57');
+      expect(currency(1234.5678, "USD$", 0)).toEqual('USD$1,235');
     });
 
     it('should pass through null and undefined to be compatible with one-time binding', function() {