Allow nodes to override strokeColor (#123)

* feat: Allow nodes to override strokeColor #122

* docs: Update jsdoc for strokeColor

* test: Add test case for strokeColor node granularity

src/components/graph/graph.config.js

@@ -96,7 +96,7 @@
  * @param {boolean} [node.renderLabel=true] - when set to false no labels will appear along side nodes in the
  * graph.
  * @param {number} [node.size=200] - 🔍🔍🔍 defines the size of all nodes.
- * @param {string} [node.strokeColor='none'] - color for the stroke of each node.
+ * @param {string} [node.strokeColor='none'] - 🔍🔍🔍  this is the stroke color that will be applied to the node if no **strokeColor property** is found inside the node itself (yes **you can pass a property 'strokeColor' inside the node and that stroke color will override this default one** ).
  * @param {number} [node.strokeWidth=1.5] - the width of the all node strokes.
  * @param {string} [node.svg=''] - 🔍🔍🔍 render custom svg for nodes in alternative to **node.symbolType**. This svg can
  * be provided as a string to either a remote svg resource or for a local one.

src/components/graph/graph.helper.js

@@ -316,7 +316,7 @@ function buildNodeProps(node, config, nodeCallbacks = {}, highlightedNode, highl
         fill = config.node.highlightColor;
     }
 
-    let stroke = config.node.strokeColor;
+    let stroke = node.strokeColor || config.node.strokeColor;
 
     if (highlight && config.node.highlightStrokeColor !== CONST.KEYWORDS.SAME) {
         stroke = config.node.highlightStrokeColor;

test/component/graph/graph.helper.test.js

@@ -218,6 +218,27 @@ describe('Graph Helper', () => {
                 });
             });
         });
+        describe('and no custom strokeColor is set', () => {
+            test('should return the default strokeColor in the props', () => {
+                const props = graphHelper.buildNodeProps(that.node, that.config, undefined, undefined, undefined, 1);
+
+                expect(props.stroke).toEqual('none');
+            });
+        });
+        describe('and custom strokeColor is set to yellow', () => {
+            test('should return yellow strokeColor in the props', () => {
+                const props = graphHelper.buildNodeProps(
+                    { ...that.node, strokeColor: 'yellow' },
+                    that.config,
+                    undefined,
+                    undefined,
+                    undefined,
+                    1
+                );
+
+                expect(props.stroke).toEqual('yellow');
+            });
+        });
     });
 
     describe('#initializeGraphState', () => {