load: update json if provided

spec/api.load-spec.js

@@ -118,4 +118,44 @@ describe('c3 api load', function () {
 
     });
 
+    describe('reload data', function () {
+
+        it('should define chart via json', function () {
+            args = {
+                data: {
+                    json: [
+                        {x: 1, y: 2},
+                        {x: 3, y: 1},
+                        {x: 5, y: 3}
+                    ],
+                    keys: {
+                      value: ["x", "y"],
+                      x: 'x',
+                    },
+                },
+            };
+            expect(true).toBeTruthy();
+        });
+
+        describe('json property of config', function () {
+
+            it('should store the re-loaded json data', function (done) {
+                chart.load({
+                    json: [
+                        {x: 10, y: 20},
+                        {x: 30, y: 10},
+                    ]
+                });
+                setTimeout(function () {
+                    var json = chart.internal.config.data_json;
+                    expect(json.length).toBe(2);
+                    expect(json[0].x).toBe(10);
+                    done();
+                }, 500);
+            });
+
+        });
+
+    });
+
 });

src/api.load.js

@@ -35,6 +35,10 @@ c3_chart_fn.load = function (args) {
         $$.load($$.getCaches(args.cacheIds), args.done);
         return;
     }
+    // update json if exists
+    if ('json' in args) {
+        config.data_json = args.json;
+    }
     // unload if needed
     if ('unload' in args) {
         // TODO: do not unload if target will load (included in url/rows/columns)