[DevTools] New harness for inspector-protocol layout tests

third_party/WebKit/LayoutTests/http/tests/inspector-protocol/tracing-test.js

-// Copyright 2014 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.
-
-var evalCallbackCallId = 3;
-
-initialize_tracingHarness = function()
-{
-
-InspectorTest.startTracing = function(callback)
-{
-    InspectorTest.startTracingWithArguments({ "categories": "-*,disabled-by-default-devtools.timeline,devtools.timeline", "type": "", "options": "" }, callback);
-}
-
-InspectorTest.startTracingAndSaveAsStream = function(callback)
-{
-    var args = {
-        "categories": "-*,disabled-by-default-devtools.timeline,devtools.timeline",
-        "type": "",
-        "options": "",
-        "transferMode": "ReturnAsStream"
-    };
-    InspectorTest.startTracingWithArguments(args, callback);
-}
-
-InspectorTest.startTracingWithArguments = function(args, callback)
-{
-    InspectorTest.sendCommand("Tracing.start", args, onStart);
-
-    function onStart(response)
-    {
-        InspectorTest.log("Recording started");
-        callback();
-    }
-}
-
-InspectorTest.stopTracing = function(callback)
-{
-    InspectorTest.eventHandler["Tracing.tracingComplete"] = tracingComplete;
-    InspectorTest.eventHandler["Tracing.dataCollected"] = dataCollected;
-    InspectorTest.sendCommand("Tracing.end", { });
-
-    InspectorTest.devtoolsEvents = [];
-    function dataCollected(reply)
-    {
-        var allEvents = reply.params.value;
-        InspectorTest.devtoolsEvents = InspectorTest.devtoolsEvents.concat(allEvents.filter(function(e)
-        {
-            return /devtools.timeline/.test(e.cat);
-        }));
-    }
-
-    function tracingComplete(event)
-    {
-        InspectorTest.log("Tracing complete");
-        InspectorTest.eventHandler["Tracing.tracingComplete"] = null;
-        InspectorTest.eventHandler["Tracing.dataCollected"] = null;
-        callback(InspectorTest.devtoolsEvents);
-    }
-}
-
-InspectorTest.stopTracingAndReturnStream = function(callback)
-{
-    InspectorTest.eventHandler["Tracing.tracingComplete"] = tracingComplete;
-    InspectorTest.eventHandler["Tracing.dataCollected"] = dataCollected;
-    InspectorTest.sendCommand("Tracing.end");
-
-    function dataCollected(reply)
-    {
-        InspectorTest.log("FAIL: dataCollected event should not be fired when returning trace as stream.");
-
-    }
-
-    function tracingComplete(event)
-    {
-        InspectorTest.log("Tracing complete");
-        InspectorTest.eventHandler["Tracing.tracingComplete"] = null;
-        InspectorTest.eventHandler["Tracing.dataCollected"] = null;
-        callback(event.params.stream);
-    }
-}
-
-InspectorTest.retrieveStream = function(streamHandle, offset, chunkSize, callback)
-{
-    var result = "";
-    var had_eof = false;
-
-    var readArguments = { handle: streamHandle };
-    if (typeof chunkSize === "number")
-        readArguments.size = chunkSize;
-    var firstReadArguments = JSON.parse(JSON.stringify(readArguments));
-    if (typeof offset === "number")
-        firstReadArguments.offset = 0;
-    InspectorTest.sendCommandOrDie("IO.read", firstReadArguments, onChunkRead);
-    // Assure multiple in-lfight reads are fine (also, save on latencies).
-    InspectorTest.sendCommandOrDie("IO.read", readArguments, onChunkRead);
-
-    function onChunkRead(response)
-    {
-        if (had_eof)
-            return;
-        result += response.data;
-        if (response.eof) {
-            // Ignore stray callbacks from proactive read requests.
-            had_eof = true;
-            callback(result);
-            return;
-        }
-        InspectorTest.sendCommandOrDie("IO.read", readArguments, onChunkRead);
-    }
-}
-
-InspectorTest.findEvents = function(name, ph, condition)
-{
-    return InspectorTest.devtoolsEvents.filter(e => e.name === name && e.ph === ph && (!condition || condition(e)));
-}
-
-InspectorTest.findEvent = function(name, ph, condition)
-{
-    var events = InspectorTest.findEvents(name, ph, condition);
-    if (events.length)
-        return events[0];
-    throw new Error("Couldn't find event " + name + " / " + ph + "\n\n in " + JSON.stringify(InspectorTest.devtoolsEvents, null, 2));
-}
-
-InspectorTest.invokeAsyncWithTracing = function(functionName, callback)
-{
-    InspectorTest.startTracing(onStart);
-
-    function onStart()
-    {
-        InspectorTest.evaluateInPageAsync(functionName + "()").then((data) => InspectorTest.stopTracing((devtoolsEvents) => callback(devtoolsEvents, data)));
-    }
-}
-
-}