Fix displayNameOfNode for Memo components

Author: eps1lon

packages/enzyme-adapter-react-17/src/ReactSeventeenAdapter.js

@@ -514,7 +514,7 @@ class ReactSeventeenAdapter extends EnzymeAdapter {
           rootNode,
           nodeHierarchy,
           nodeTypeFromType,
-          adapter.displayNameOfNode,
+          adapter.displayNameOfNode.bind(adapter),
           catchingType,
         );
       },
@@ -692,7 +692,7 @@ class ReactSeventeenAdapter extends EnzymeAdapter {
           cachedNode,
           nodeHierarchy.concat(cachedNode),
           nodeTypeFromType,
-          adapter.displayNameOfNode,
+          adapter.displayNameOfNode.bind(adapter),
           cachedNode.type,
         );
       },
@@ -818,8 +818,11 @@ class ReactSeventeenAdapter extends EnzymeAdapter {
       case ContextConsumer || NaN: return 'ContextConsumer';
       case ContextProvider || NaN: return 'ContextProvider';
       case Memo || NaN: {
-        const nodeName = displayNameOfNode(node);
-        return typeof nodeName === 'string' ? nodeName : `Memo(${displayNameOfNode(type)})`;
+        if (type.displayName) {
+          return type.displayName;
+        }
+        const name = this.displayNameOfNode({ type: type.type });
+        return name ? `Memo(${name})` : 'Memo';
       }
       case ForwardRef || NaN: {
         if (type.displayName) {

packages/enzyme-test-suite/test/Utils-spec.jsx

@@ -600,11 +600,7 @@ describe('Utils', () => {
         Foo.displayName = 'CustomWrapper';
 
         const MemoForwardFoo = React.memo(React.forwardRef(Foo));
-        if (is('>= 17')) {
-          expect(adapter.displayNameOfNode(<MemoForwardFoo />)).to.equal('Memo([object Object])');
-        } else {
-          expect(adapter.displayNameOfNode(<MemoForwardFoo />)).to.equal('Memo(ForwardRef(CustomWrapper))');
-        }
+        expect(adapter.displayNameOfNode(<MemoForwardFoo />)).to.equal('Memo(ForwardRef(CustomWrapper))');
       });
     });
   });