fix(selector): select by attribute independent of value and order

Closes #2513

Author: tbosch

modules/angular2/src/render/dom/compiler/selector.ts

@@ -285,6 +285,11 @@ export class SelectorMatcher {
                  result;
 
         var partialValuesMap = MapWrapper.get(this._attrValuePartialMap, attrName);
+        if (!StringWrapper.equals(attrValue, _EMPTY_ATTR_VALUE)) {
+          result = this._matchPartial(partialValuesMap, _EMPTY_ATTR_VALUE, cssSelector,
+                                      matchedCallback) ||
+                   result;
+        }
         result =
             this._matchPartial(partialValuesMap, attrValue, cssSelector, matchedCallback) || result;
       }

modules/angular2/test/render/dom/compiler/selector_spec.ts

@@ -68,6 +68,24 @@ export function main() {
       expect(matcher.match(CssSelector.parse('[someAttr][someAttr2]')[0], selectableCollector))
           .toEqual(true);
       expect(matched).toEqual([s1[0], 1, s2[0], 2]);
+
+      reset();
+      expect(matcher.match(CssSelector.parse('[someAttr=someValue][someAttr2]')[0],
+                           selectableCollector))
+          .toEqual(true);
+      expect(matched).toEqual([s1[0], 1, s2[0], 2]);
+
+      reset();
+      expect(matcher.match(CssSelector.parse('[someAttr2][someAttr=someValue]')[0],
+                           selectableCollector))
+          .toEqual(true);
+      expect(matched).toEqual([s1[0], 1, s2[0], 2]);
+
+      reset();
+      expect(matcher.match(CssSelector.parse('[someAttr2=someValue][someAttr]')[0],
+                           selectableCollector))
+          .toEqual(true);
+      expect(matched).toEqual([s1[0], 1, s2[0], 2]);
     });
 
     it('should select by attr name only once if the value is from the DOM', () => {