refactor: Tag class support in registerTag()

test/unit/parser/parse-stream.ts

@@ -0,0 +1,15 @@
+import * as chai from 'chai'
+import { ParseStream } from '../../../src/parser'
+import { Token } from '../../../src/tokens'
+
+const expect = chai.expect
+
+describe('parseStream', () => {
+  it('should trigger "token" event', () => {
+    const token = { kind: 4 } as Token
+    const ps = new ParseStream([token], (token) => ({ token } as any))
+    let got
+    ps.on('token', token => { got = token }).start()
+    expect(got).to.equal(token)
+  })
+})