fix(numberFilter): always convert scientific notation to decimal

Previously, the number filter would format small and large numbers
as scientific notation. It now uses toFixed() to ensure that all
requested digits are shown.

Author: pmeskers

src/ng/filter/filters.js

@@ -171,6 +171,11 @@ function formatNumber(number, pattern, groupSep, decimalSep, fractionSize) {
     }
 
     if (fractionSize && fractionSize !== "0") formatedText += decimalSep + fraction.substr(0, fractionSize);
+  } else {
+
+    if (fractionSize > 0 && number > -1 && number < 1) {
+      formatedText = number.toFixed(fractionSize);
+    }
   }
 
   parts.push(isNegative ? pattern.negPre : pattern.posPre);

test/ng/filter/filtersSpec.js

@@ -145,9 +145,24 @@ describe('filters', function() {
       expect(number(1234.567, 2)).toEqual("1,234.57");
     });
 
-    it('should filter exponential numbers', function() {
-      expect(number(1e50, 0)).toEqual('1e+50');
-      expect(number(-2e50, 2)).toEqual('-2e+50');
+    it('should filter exponentially large numbers', function() {
+      expect(number(1e50)).toEqual('1e+50');
+      expect(number(-2e100)).toEqual('-2e+100');
+    });
+
+    it('should ignore fraction sizes for large numbers', function() {
+      expect(number(1e50, 2)).toEqual('1e+50');
+      expect(number(-2e100, 5)).toEqual('-2e+100');
+    });
+
+    it('should filter exponentially small numbers', function() {
+      expect(number(1e-50, 0)).toEqual('0');
+      expect(number(1e-6, 6)).toEqual('0.000001');
+      expect(number(1e-7, 6)).toEqual('0.000000');
+
+      expect(number(-1e-50, 0)).toEqual('-0');
+      expect(number(-1e-6, 6)).toEqual('-0.000001');
+      expect(number(-1e-7, 6)).toEqual('-0.000000');
     });
   });