fix(ast): TxtAST alwasys has type value

Author: azu

.babelrc

@@ -7,6 +7,11 @@
       "presets": [
         "jsdoc-to-assert",
         "power-assert"
+      ],
+      "only":[
+        "src/*.js",
+        "test/*.js",
+        "node_modules/textlint-ast-test/lib/*.js"
       ]
     }
   }

package.json

@@ -42,6 +42,7 @@
     "mocha": "^2.3.3",
     "power-assert": "^1.4.0",
     "textlint": "^6.7.0",
+    "textlint-ast-test": "^1.1.3",
     "textlint-rule-no-todo": "^2.0.0"
   },
   "dependencies": {

src/html-to-ast.js

@@ -60,8 +60,12 @@ export function parse(html) {
                     end: {line: position.end.line, column: position.end.column + 1}
                 };
             }
+            // Unknown type
+            if (typeof node.type === "undefined") {
+                node.type = "UNKNOWN";
+            }
             // map `range`, `loc` and `raw` to node
-            if (node.position) {
+            if (typeof node.position === "object") {
                 let position = node.position;
                 // TxtNode's line start with 1
                 // TxtNode's column start with 0