handle surrounding inline void nodes on insert

src/models/block.js

@@ -53,9 +53,9 @@ class Block extends new Record(DEFAULTS) {
     properties.isVoid = !!properties.isVoid
     properties.nodes = Block.createList(properties.nodes)
 
-    // if (properties.nodes.size == 0) {
+    if (properties.nodes.size == 0) {
-    //   properties.nodes = properties.nodes.push(Text.create())
+      properties.nodes = properties.nodes.push(Text.create())
-    // }
+    }
 
     return new Block(properties).normalize()
   }

src/transforms/by-key.js

@@ -37,7 +37,25 @@ export function insertNodeByKey(transform, key, index, node) {
   const { document } = state
   const path = document.getPath(key)
   const newPath = path.slice().push(index)
-  return transform.insertNodeOperation(path, index, node)
+  transform.insertNodeOperation(path, index, node)
+
+  // If the node is an inline void, the parent is a block, and the node will be
+  // inserted at the block's edge, we need to add surrounding text nodes.
+  if (node.kind == 'inline' && node.isVoid) {
+    const parent = document.assertDescendant(key)
+
+    if (index == 0) {
+      const text = Text.create()
+      transform.insertNodeByKey(key, index, text)
+    }
+
+    if (index == parent.nodes.size) {
+      const text = Text.create()
+      transform.insertNodeByKey(key, index + 1, text)
+    }
+  }
+
+  return transform
 }
 
 /**

test/transforms/index.js

@@ -18,7 +18,6 @@ describe('transforms', () => {
 
     for (const transform of transforms) {
       if (transform[0] == '.') continue
-      if (transform == 'insert-node-by-key') continue
 
       describe(`${toCamel(transform)}()`, () => {
         const transformDir = resolve(__dirname, './fixtures/by-key', transform)