fix(location): fix parameter handling on search()

docs/content/error/location/wpt.ngdoc

@@ -0,0 +1,4 @@
+@ngdoc error
+@name $location:wpt
+@fullName Wrong parameter type
+@description

src/ng/location.js

@@ -353,17 +353,24 @@ LocationHashbangInHtml5Url.prototype =
    * @return {string} search
    */
   search: function(search, paramValue) {
-    if (isUndefined(search))
-      return this.$$search;
-
-    if (isDefined(paramValue)) {
-      if (paramValue === null) {
-        delete this.$$search[search];
-      } else {
-        this.$$search[search] = paramValue;
-      }
-    } else {
-      this.$$search = isString(search) ? parseKeyValue(search) : search;
+    switch (arguments.length) {
+      case 0:
+        return this.$$search;
+      case 1:
+        if (isString(search)) {
+          this.$$search = parseKeyValue(search);
+        } else if (isObject(search)) {
+          this.$$search = search;
+        } else {
+          throw $locationMinErr('wpt', 'First parameter of function must be string or an object.');
+        }
+        break;
+      default:
+        if (paramValue == undefined || paramValue == null) {
+          delete this.$$search[search];
+        } else {
+          this.$$search[search] = paramValue;
+        }
     }
 
     this.$$compose();

test/ng/locationSpec.js

@@ -66,6 +66,35 @@ describe('$location', function() {
     });
 
 
+    it('search() should handle multiple value', function() {
+      url.search('a&b');
+      expect(url.search()).toEqual({a: true, b: true});
+
+      url.search('a', null);
+
+      expect(url.search()).toEqual({b: true});
+
+      url.search('b', undefined);
+      expect(url.search()).toEqual({});
+    });
+
+
+    it('search() should handle single value', function() {
+      url.search('ignore');
+      expect(url.search()).toEqual({ignore: true});
+    });
+
+
+    it('search() should throw error an incorrect argument', function() {
+      expect(function() {
+        url.search(null);
+      }).toThrow('[$location:wpt] First parameter of function must be string or an object.');
+      expect(function() {
+        url.search(undefined);
+      }).toThrow('[$location:wpt] First parameter of function must be string or an object.');
+    });
+
+
     it('hash() should change hash fragment', function() {
       url.hash('new-hash');
       expect(url.hash()).toBe('new-hash');