add portal support

Author: jgzuke

packages/enzyme-adapter-react-16.1/src/ReactSixteenOneAdapter.js

@@ -83,9 +83,16 @@ function toTree(vnode) {
   switch (node.tag) {
     case HostRoot: // 3
       return childrenToTree(node.child);
-    case HostPortal: { // 4
-      return childrenToTree(node.child);
-    }
+    case HostPortal: // 4
+      return {
+        nodeType: 'portal',
+        type: Portal,
+        props: {},
+        key: ensureKeyOrUndefined(node.key),
+        ref: node.ref,
+        instance: null,
+        rendered: childrenToTree(node.child),
+      };
     case ClassComponent:
       return {
         nodeType: 'class',

packages/enzyme-adapter-react-16.2/src/ReactSixteenTwoAdapter.js

@@ -84,9 +84,16 @@ function toTree(vnode) {
   switch (node.tag) {
     case HostRoot: // 3
       return childrenToTree(node.child);
-    case HostPortal: { // 4
-      return childrenToTree(node.child);
-    }
+    case HostPortal: // 4
+      return {
+        nodeType: 'portal',
+        type: Portal,
+        props: {},
+        key: ensureKeyOrUndefined(node.key),
+        ref: node.ref,
+        instance: null,
+        rendered: childrenToTree(node.child),
+      };
     case ClassComponent:
       return {
         nodeType: 'class',

packages/enzyme-adapter-react-16.3/src/ReactSixteenThreeAdapter.js

@@ -89,9 +89,16 @@ function toTree(vnode) {
   switch (node.tag) {
     case HostRoot: // 3
       return childrenToTree(node.child);
-    case HostPortal: { // 4
-      return childrenToTree(node.child);
-    }
+    case HostPortal: // 4
+      return {
+        nodeType: 'portal',
+        type: Portal,
+        props: {},
+        key: ensureKeyOrUndefined(node.key),
+        ref: node.ref,
+        instance: null,
+        rendered: childrenToTree(node.child),
+      };
     case ClassComponent:
       return {
         nodeType: 'class',

packages/enzyme-adapter-react-16/src/ReactSixteenAdapter.js

@@ -89,9 +89,16 @@ function toTree(vnode) {
   switch (node.tag) {
     case HostRoot: // 3
       return childrenToTree(node.child);
-    case HostPortal: { // 4
-      return childrenToTree(node.child);
-    }
+    case HostPortal: // 4
+      return {
+        nodeType: 'portal',
+        type: Portal,
+        props: {},
+        key: ensureKeyOrUndefined(node.key),
+        ref: node.ref,
+        instance: null,
+        rendered: childrenToTree(node.child),
+      };
     case ClassComponent:
       return {
         nodeType: 'class',

packages/enzyme-adapter-utils/package.json

@@ -36,7 +36,8 @@
   "dependencies": {
     "function.prototype.name": "^1.1.0",
     "object.assign": "^4.1.0",
-    "prop-types": "^15.6.2"
+    "prop-types": "^15.6.2",
+    "react-is": "^16.4.2"
   },
   "peerDependencies": {
     "react": "0.13.x || 0.14.x || ^15.0.0-0 || ^16.0.0-0"

packages/enzyme-adapter-utils/src/Utils.js

@@ -1,6 +1,9 @@
 import functionName from 'function.prototype.name';
 import createMountWrapper from './createMountWrapper';
 import createRenderWrapper from './createRenderWrapper';
+import {
+  Portal,
+} from 'react-is';
 
 export { createMountWrapper, createRenderWrapper };
 
@@ -94,6 +97,10 @@ export function displayNameOfNode(node) {
 
   if (!type) return null;
 
+  if (type === Portal) {
+    return 'Portal';
+  }
+
   return type.displayName || (typeof type === 'function' ? functionName(type) : type.name || type);
 }
 
@@ -104,6 +111,9 @@ export function nodeTypeFromType(type) {
   if (type && type.prototype && type.prototype.isReactComponent) {
     return 'class';
   }
+  if (type && type === Portal) {
+    return 'portal';
+  }
   return 'function';
 }