fix(Angular.js): handle duplicate params in parseKeyValue/toKeyValue

parseKeyValue and toKeyValue can now handle duplicate values in the query.
```
?x=1&x=2 <-> {x:[1,2]}
```

The algorithm looks like:
    1)parseKeyValue looks for presence of obj[key]
    2)detects and replaces obj[key] with [obj[key],val]
    3)then pushes more duplicates if necessary
    4)toKeyValue decodes array correctly
    5)(not changed)$location.search({param: 'key'}) still replaces if necessary
    6)(not changed)$location.search({param: ['key1', 'key2']}) sets the url with duplicates

BREAKING CHANGE: Before this change:
- `parseKeyValue` only took the last key overwriting all the previous keys;
- `toKeyValue` joined the keys together in a comma delimited string.
This was deemed buggy behavior. If your server relied on this behavior
then either the server should be fixed or a simple serialization of
the array should be done on the client before passing it to $location.

1 files changed, 23 insertions, 0 deletions

diff --git a/test/ng/locationSpec.js b/test/ng/locationSpec.js
index df8043a3..df826525 100644
--- a/test/ng/locationSpec.js
+++ b/test/ng/locationSpec.js
@@ -368,6 +368,29 @@ describe('$location', function() {
         locationUrl.search('q', '1/2 3');
         expect(locationUrl.search()).toEqual({'q': '1/2 3'});
       });
+
+      it('should return an array for duplicate params', function() {
+        var locationUrl = new LocationHtml5Url('http://host.com');
+        locationUrl.$$parse('http://host.com')
+        locationUrl.search('q', ['1/2 3','4/5 6']);
+        expect(locationUrl.search()).toEqual({'q': ['1/2 3','4/5 6']});
+      });
+
+      it('should encode an array correctly from search and add to url', function() {
+        var locationUrl = new LocationHtml5Url('http://host.com');
+        locationUrl.$$parse('http://host.com')
+        locationUrl.search({'q': ['1/2 3','4/5 6']});
+        expect(locationUrl.absUrl()).toEqual('http://host.com?q=1%2F2%203&q=4%2F5%206');
+      });
+
+      it('should rewrite params when specifing a single param in search', function() {
+        var locationUrl = new LocationHtml5Url('http://host.com');
+        locationUrl.$$parse('http://host.com')
+        locationUrl.search({'q': '1/2 3'});
+        expect(locationUrl.absUrl()).toEqual('http://host.com?q=1%2F2%203');
+        locationUrl.search({'q': '4/5 6'});
+        expect(locationUrl.absUrl()).toEqual('http://host.com?q=4%2F5%206');
+      });
     });
   });