fix(tokenizer): Don't process data after error (#923)

Also add a test for multi-byte entities, and change the Jest coverage provider to V8.

package.json

@@ -67,7 +67,8 @@
     },
     "jest": {
         "preset": "ts-jest",
-        "testEnvironment": "node"
+        "testEnvironment": "node",
+        "coverageProvider": "v8"
     },
     "prettier": {
         "tabWidth": 4

src/Tokenizer.ts

@@ -315,14 +315,14 @@ export default class Tokenizer {
     }
 
     public write(chunk: string): void {
-        if (this.ended) this.cbs.onerror(Error(".write() after done!"));
+        if (this.ended) return this.cbs.onerror(Error(".write() after done!"));
         if (this.buffer.length) this.buffer += chunk;
         else this.buffer = chunk;
         this.parse();
     }
 
     public end(chunk?: string): void {
-        if (this.ended) this.cbs.onerror(Error(".end() after done!"));
+        if (this.ended) return this.cbs.onerror(Error(".end() after done!"));
         if (chunk) this.write(chunk);
         this.ended = true;
         if (this.running) this.finish();

src/__fixtures__/Events/43-multibyte-entity.json

@@ -0,0 +1,10 @@
+{
+    "name": "Multi-byte entity",
+    "html": "≧̸",
+    "expected": [
+        {
+            "data": ["≧̸"],
+            "event": "text"
+        }
+    ]
+}

src/__tests__/events.ts

@@ -1,3 +1,4 @@
+import { Parser } from "..";
 import * as helper from "../__fixtures__/test-helper";
 
 helper.createSuite("Events", (test, cb) =>
@@ -7,3 +8,19 @@ helper.createSuite("Events", (test, cb) =>
         test.html
     )
 );
+
+describe("Helper", () => {
+    it("should handle errors", () => {
+        const eventCb = jest.fn();
+        const parser = new Parser(helper.getEventCollector(eventCb));
+
+        parser.end();
+        parser.write("foo");
+
+        expect(eventCb).toHaveBeenCalledTimes(2);
+        expect(eventCb).toHaveBeenNthCalledWith(1, null, []);
+        expect(eventCb).toHaveBeenLastCalledWith(
+            new Error(".write() after done!")
+        );
+    });
+});