Media Remoting: Add browser tests.

chrome/test/data/extensions/api_test/media_remoting/test_rpc.js

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+'use strict';
+
+// The RPCs used in this test. These should keep identical with those defined in
+// src/media/remoting/rpc.proto.
+mrTest.RpcProc = {
+  RPC_ACQUIRE_RENDERER: 1,
+  RPC_ACQUIRE_RENDERER_DONE: 2,
+  RPC_R_INITIALIZE: 1000,
+  RPC_R_STARTPLAYINGFROM: 1002,
+  RPC_R_INITIALIZE_CALLBACK: 1100,
+  RPC_DS_INITIALIZE: 3000,
+  RPC_DS_INITIALIZE_CALLBACK: 3100
+};
+
+mrTest.WireType = {
+  INVALID: -1,
+  VARINT: 0,
+  FIXED64: 1,
+  DELIMITED: 2,
+  START_GROUP: 3,
+  END_GROUP: 4,
+  FIXED32: 5
+};
+
+mrTest.RpcMessage = class {
+  constructor() {
+    this.handle = null;
+    this.proc = null;
+    this.integerValue = null;
+    this.boolValue = null;
+    this.rendererInitializeRpc = null;
+  }
+
+  setHandle(handle) { this.handle = handle; }
+  setProc(proc) { this.proc = proc; }
+  setIntegerValue(value) { this.integerValue = value; }
+  setBool(boolValue) { this.boolValue = boolValue; }
+  setRendererInitializeRpc(msg) { this.rendererInitializeRpc = msg; }
+
+  getHandle() { return this.handle; }
+  getProc() { return this.proc; }
+  getIntegerValue() { return this.integerValue; }
+  getBool() { return this.boolValue; }
+  getRendererInitializeRpc() { return this.rendererInitializeRpc; }
+};
+
+mrTest.RendererInitializeRpc = class {
+  constructor() {
+    this.handle = null;
+    this.audioDemuxerHandle = null;
+    this.videoDemuxerHandle = null;
+    this.callbackHandle = null;
+  }
+
+  setHandle(handle) { this.handle = handle; }
+  setAudioDemuxerHandle(handle) { this.audioDemuxerHandle = handle; }
+  setVideoDemuxerHandle(handle) { this.videoDemuxerHandle = handle; }
+  setCallbackHandle(handle) { this.callbackHandle = handle; }
+
+  getHandle() { return this.handle; }
+  getAudioDemuxerHandle() { return this.audioDemuxerHandle; }
+  getVideoDemuxerHandle() { return this.videoDemuxerHandle; }
+  getCallbackHandle() { return this.callbackHandle; }
+}
+
+// A partial RPC message deserializer.
+mrTest.reader = class {
+  constructor(message) {
+    this.buf = message;
+    this.nextField = null;
+    this.nextWireType = null;
+    this.readPos = 0;
+    this.end = this.buf.length;
+  }
+
+  // Returns false when reaches the end.
+  readNextField() {
+    if (this.readPos >= this.end) {
+      this.nextField = null;
+      this.nextWireType = null;
+      return false;
+    }
+
+    let header = this.readInt32();
+    this.nextField = header >>> 3;
+    this.nextWireType = header & 0x7;
+    return true;
+  }
+
+  readInt32() {
+    var tmp;
+    let x = 0;
+    for (var i = 0; i < 4; i++) {
+      tmp = this.buf[this.readPos++];
+      x |= (tmp & 0x7F) << (i * 7);
+      if (tmp < 128)
+        return x;
+    }
+    tmp = this.buf[this.readPos++];
+    x |= (tmp & 0x0F) << 28;
+    if (tmp < 128)
+      return x >>> 0;
+
+    chrome.test.assertEq(tmp & 0xF0, 0xF0);
+    return x;
+  }
+
+  deserializeRendererInitializeRpc(msg) {
+    let len = this.readInt32();
+    let oldEnd = this.end;
+    this.end = this.readPos + len;
+    while (this.readNextField()) {
+      if (this.nextWireType == mrTest.WireType.END_GROUP)
+        break;
+      switch (this.nextField) {
+        case 1:
+          msg.setHandle(this.readInt32());
+          break;
+        case 2:
+          msg.setAudioDemuxerHandle(this.readInt32());
+          break;
+        case 3:
+          msg.setVideoDemuxerHandle(this.readInt32());
+          break;
+        case 4:
+          msg.setCallbackHandle(this.readInt32());
+          break;
+        default:
+          // Ignore other fields.
+          this.skipField();
+      }
+    }
+    this.readPos = this.end;
+    this.end = oldEnd;
+  }
+
+  deserializeBinary(msg) {
+    while (this.readNextField()) {
+      if (this.nextWireType == mrTest.WireType.END_GROUP)
+        break;
+      switch (this.nextField) {
+        case 1:
+          chrome.test.assertEq(this.nextWireType, mrTest.WireType.VARINT);
+          msg.setHandle(this.readInt32());
+          break;
+        case 2:
+          chrome.test.assertEq(this.nextWireType, mrTest.WireType.VARINT);
+          msg.setProc(this.readInt32());
+          break;
+        case 3:
+          chrome.test.assertEq(this.nextWireType, mrTest.WireType.VARINT);
+          msg.setIntegerValue(this.readInt32());
+          break;
+        case 6:
+          chrome.test.assertEq(this.nextWireType, mrTest.WireType.VARINT);
+          let value = this.readInt32();
+          msg.setBool(!!value);
+          break;
+        case 100:
+          let rendererInitializeMsg = new mrTest.RendererInitializeRpc();
+          this.deserializeRendererInitializeRpc(rendererInitializeMsg);
+          msg.setRendererInitializeRpc(rendererInitializeMsg);
+          break;
+        default:
+          this.skipField();
+      }
+    }
+  }
+
+  skipField() {
+    switch (this.nextWireType) {
+      case mrTest.WireType.VARINT:
+        while (this.buf[this.readPos++] & 0x80) {}
+        break;
+      case mrTest.WireType.FIXED64:
+        this.readPos += 8;
+        break;
+      case mrTest.WireType.DELIMITED:
+        let len = this.readInt32();
+        this.readPos += len;
+        break;
+      case mrTest.WireType.FIXED32:
+        this.readPos += 4;
+        break;
+      case mrTest.WireType.START_GROUP:
+        this.skipGroup();
+        break;
+      default:
+        chrome.test.fail('wrong nextWireType_.' + this.nextWireType);
+    }
+  }
+
+  skipGroup() {
+    let nestedGroups = [this.nextField];
+    do {
+      chrome.test.assertTrue(this.readNextField());
+      if (this.nextWireType == mrTest.WireType.START_GROUP) {
+        nestedGroups.push(this.nextField);
+      } else if (this.nextWireType == mrTest.WireType.END_GROUP) {
+        chrome.test.assertEq(this.nextField, nestedGroups.pop());
+      }
+    } while (nestedGroups.length > 0);
+  }
+
+};
+
+// A partial RPC message serializer.
+mrTest.Writer = class {
+  constructor() {
+    this.buf = [];
+  }
+
+  serializeMessage(msg) {
+    if (msg.getHandle()) {
+      this.writeFieldHeader(1, mrTest.WireType.VARINT);
+      this.writeSignedVarint32(msg.getHandle());
+    }
+    if (msg.getProc()) {
+      this.writeFieldHeader(2, mrTest.WireType.VARINT);
+      this.writeSignedVarint32(msg.getProc());
+    }
+    if (msg.getIntegerValue()) {
+      this.writeFieldHeader(3, mrTest.WireType.VARINT);
+      this.writeSignedVarint32(msg.getIntegerValue());
+    }
+    if (msg.getBool() != null) {
+      this.writeFieldHeader(6, mrTest.WireType.VARINT);
+      this.writeSignedVarint32(msg.getBool() ? 1 : 0);
+    }
+  }
+
+  getResultBuffer() {
+    let flat = new Uint8Array(this.buf.length);
+    flat.set(this.buf, 0);
+    return flat;
+  }
+
+  writeUnsignedVarint32(value) {
+    while (value > 127) {
+      this.buf.push((value & 0x7f) | 0x80);
+      value = value >>> 7;
+    }
+    this.buf.push(value);
+  }
+
+  writeSignedVarint32(value) {
+    if (value >= 0) {
+      this.writeUnsignedVarint32(value);
+      return;
+    }
+
+    for (var i=0; i < 9; i++) {
+      this.buf.push((value & 0x7f) | 0x80);
+      value = value >> 7;
+    }
+    this.buf.push(1);
+  }
+
+  writeFieldHeader(field, wireType) {
+    this.writeUnsignedVarint32((field << 3) + wireType);
+  }
+}
+