allow to xhr.send the appropriate falsy HTTP request body (false, 0, "", null, undefined)

Author: johnhoffman

src/ng/httpBackend.js

@@ -109,12 +109,7 @@ function createHttpBackend($browser, createXhr, $browserDefer, callbacks, rawDoc
         }
       }
 
-      if (post === false) {
-        xhr.send(post);
-      }
-      else {
-        xhr.send(post || null);
-      }
+      xhr.send(post);
     }
 
     if (timeout > 0) {

test/ng/httpBackendSpec.js

@@ -50,11 +50,21 @@ describe('$httpBackend', function() {
     expect(xhr.$$data).toBe(null);
   });
 
-  it('should pass false to send if false body is set', function() {
-    $backend('GET', '/some-url', false, noop);
+  it('should pass the correct falsy value to send if falsy body is set (excluding NaN)', function() {
+    var values = [false, 0, "", null, undefined];
+    angular.forEach(values, function(value) {
+      $backend('GET', '/some-url', value, noop);
+      xhr = MockXhr.$$lastInstance;
+
+      expect(xhr.$$data).toBe(value);
+    });
+  });
+
+  it('should pass NaN to send if NaN body is set', function() {
+    $backend('GET', '/some-url', NaN, noop);
     xhr = MockXhr.$$lastInstance;
 
-    expect(xhr.$$data).toBe(false);
+    expect(isNaN(xhr.$$data)).toEqual(true);
   });
 
   it('should call completion function with xhr.statusText if present', function() {