[THRIFT-4771] add nodejs THeaderProtocol support (#1743)

Client: nodejs
diff --git a/lib/nodejs/test/header.test.js b/lib/nodejs/test/header.test.js
new file mode 100644
index 0000000..efd7f81
--- /dev/null
+++ b/lib/nodejs/test/header.test.js
@@ -0,0 +1,78 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+const TFramedTransport = require("../lib/thrift/framed_transport");
+const THeaderTransport = require("../lib/thrift/header_transport");
+const THeaderProtocol = require("../lib/thrift/header_protocol");
+const thrift = require("../lib/thrift");
+const fs = require("fs");
+const test = require("tape");
+const path = require("path");
+
+const headerPayload = fs.readFileSync(
+  path.join(__dirname, "test_header_payload")
+);
+
+const cases = {
+  "Should read headers from payload": function(assert) {
+    const transport = new TFramedTransport();
+    transport.inBuf = Buffer.from(headerPayload);
+
+    const headers = transport.readHeaders();
+    assert.equals(headers.Parent, "shoobar");
+    assert.equals(headers.Trace, "abcde");
+    assert.end();
+  },
+  "Should read headers when reading message begin": function(assert) {
+    const transport = new TFramedTransport();
+    transport.inBuf = Buffer.from(headerPayload);
+    const protocol = new THeaderProtocol(transport);
+    const result = protocol.readMessageBegin();
+
+    const headers = transport.getReadHeaders();
+    assert.equals(headers.Parent, "shoobar");
+    assert.equals(headers.Trace, "abcde");
+    assert.equals(result.fname, "add");
+    assert.equals(result.mtype, thrift.Thrift.MessageType.CALL);
+    assert.end();
+  },
+  "Should be able to write headers": function(assert) {
+    const writeTransport = new TFramedTransport();
+    writeTransport.setProtocolId(THeaderTransport.SubprotocolId.BINARY);
+    writeTransport.setWriteHeader("Hihihihi", "hohohoho");
+    writeTransport.setWriteHeader("boobooboo", "fooshoopoo");
+    writeTransport.setWriteHeader("a", "z");
+    writeTransport.writeHeaders();
+    const writeBuffer = writeTransport.outBuffers[0];
+
+    const readTransport = new TFramedTransport();
+    readTransport.inBuf = writeBuffer;
+    readTransport.readHeaders();
+
+    const headers = readTransport.getReadHeaders();
+    assert.equals(headers.Hihihihi, "hohohoho");
+    assert.equals(headers.boobooboo, "fooshoopoo");
+    assert.equals(headers.a, "z");
+    assert.end();
+  }
+};
+
+Object.keys(cases).forEach(function(caseName) {
+  test(caseName, cases[caseName]);
+});