DevTools: add "npm test" to run tests by fetching content shells

third_party/WebKit/Source/devtools/scripts/npm_test.js

Index: third_party/WebKit/Source/devtools/scripts/npm_test.js
diff --git a/third_party/WebKit/Source/devtools/scripts/npm_test.js b/third_party/WebKit/Source/devtools/scripts/npm_test.js
new file mode 100644
index 0000000000000000000000000000000000000000..dc14020ce579554163b4242a725751546e6e976d
--- /dev/null
+++ b/third_party/WebKit/Source/devtools/scripts/npm_test.js
@@ -0,0 +1,263 @@
+// Copyright 2016 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 childProcess = require("child_process");
+var fs = require("fs");
+var path = require("path");
+var shell = require("child_process").execSync;
+
+var utils = require("./utils");
+
+var Flags = {
+    BUILD_ONLY: "--build-only",
+    DEBUG_DEVTOOLS: "--debug-devtools",
+    TEST_ONLY: "--test-only",
+};
+
+var IS_DEBUG_ENABLED = utils.includes(process.argv, Flags.DEBUG_DEVTOOLS);
+var IS_BUILD_ONLY = utils.includes(process.argv, Flags.BUILD_ONLY);
+var IS_TEST_ONLY = utils.includes(process.argv, Flags.TEST_ONLY);
+
+var CONTENT_SHELL_ZIP = "content-shell.zip";
+var MAX_CONTENT_SHELLS = 10;
+var PLATFORM = getPlatform();
+var PYTHON = process.platform === "win32" ? "python.bat" : "python";
+
+var BLINK_TEST_PATH = path.resolve(__dirname, "..", "..", "..", "..", "..", "blink", "tools", "run_layout_tests.py");
+var CACHE_PATH = path.resolve(__dirname, "..", ".test_cache");
+var SOURCE_PATH = path.resolve(__dirname, "..", "front_end");
+
+function main(){
+    if (IS_TEST_ONLY) {
+        findPreviousUploadedPosition(findMostRecentChromiumCommit())
+            .then(commitPosition => runTests(path.resolve(CACHE_PATH, commitPosition, "out")));
+        return;
+    }
+    if (!utils.isDir(CACHE_PATH))
+        fs.mkdirSync(CACHE_PATH);
+    deleteOldContentShells();
+    findPreviousUploadedPosition(findMostRecentChromiumCommit())
+        .then(onUploadedCommitPosition)
+        .catch(onError);
+
+    function onError(error) {
+        console.log("Unable to run tests because of error:", error);
+        console.log(`Try removing the .test_cache folder [${CACHE_PATH}] and retrying`);
+    }
+}
+main();
+
+function onUploadedCommitPosition(commitPosition)
+{
+    var contentShellDirPath = path.resolve(CACHE_PATH, commitPosition, "out", "Release");
+    var hasCachedContentShell = utils.isFile(getContentShellBinaryPath(contentShellDirPath));
+    if (hasCachedContentShell) {
+        var contentShellPath = path.resolve(CACHE_PATH, commitPosition, "out");
+        console.log(`Using cached content shell at: ${contentShellPath}`);
+        return buildAndTest(contentShellPath);
+    }
+    return prepareContentShellDirectory(commitPosition)
+        .then(downloadContentShell)
+        .then(extractContentShell)
+        .then(buildAndTest);
+}
+
+function getPlatform()
+{
+    if (process.platform === "linux") {
+        if (process.arch === "x64")
+            return "Linux_x64";
+        throw new Error("Pre-compiled content shells are only available for x64 on Linux");
+    }
+    if (process.platform === "win32") {
+        if (process.arch === "x64")
+            return "Win_x64";
+        return "Win";
+    }
+    if (process.platform === "darwin") {
+        return "Mac";
+    }
+    throw new Error(`Unrecognized platform detected: ${process.platform}`);
+}
+
+function findMostRecentChromiumCommit()
+{
+    var commitMessage = shell(`git log --max-count=1 --grep="Cr-Commit-Position"`).toString().trim();
+    var commitPosition = commitMessage.match(/Cr-Commit-Position: refs\/heads\/master@\{#([0-9]+)\}/)[1];
+    return commitPosition;
+}
+
+function deleteOldContentShells()
+{
+    var files = fs.readdirSync(CACHE_PATH);
+    if (files.length < MAX_CONTENT_SHELLS)
+        return;
+    files.sort((a, b) => parseInt(b, 10) - parseInt(a, 10));
+    var remainingNumberOfContentShells = MAX_CONTENT_SHELLS / 2;
+    var oldContentShellDirs = files.slice(remainingNumberOfContentShells);
+    for (var i = 0; i < oldContentShellDirs.length; i++)
+        utils.removeRecursive(path.resolve(CACHE_PATH, oldContentShellDirs[i]));
+    console.log(`Removed old content shells: ${oldContentShellDirs}`)
+}
+
+function findPreviousUploadedPosition(commitPosition)
+{
+    var previousPosition = commitPosition - 100;
+    var positionsListURL = `http://commondatastorage.googleapis.com/chromium-browser-snapshots/?delimiter=/&prefix=${PLATFORM}/&marker=${PLATFORM}/${previousPosition}/`;

[dgozman, 2016/10/17 19:13:51]

Does one need any permissions for this url?

[chenwilliam, 2016/10/18 18:13:18]

Nope, I was able to download it at home w/ my personal computer.

+    return utils.fetch(positionsListURL)
+        .then(onPositionsList)
+        .catch(onError);
+
+    function onPositionsList(buffer)
+    {
+        var positions = buffer.toString("binary")
+            .match(/([^<>]+)(?=<\/Prefix><\/CommonPrefixes>)/g)
+            .map(prefixedPosition => prefixedPosition.split("/")[1])
+            .map(positionString => parseInt(positionString, 10));
+        var positionSet = new Set(positions);
+        var previousUploadedPosition = commitPosition;
+        while (commitPosition - previousUploadedPosition < 100) {
+            if (positionSet.has(previousUploadedPosition))
+                return previousUploadedPosition.toString();
+            previousUploadedPosition--;
+        }
+        onError();
+    }
+
+    function onError(error)
+    {
+        if (error)
+            console.log(`Received error: ${error} trying to fetch positions list from url: ${positionsListURL}`);
+        throw new Error(`Unable to find a previous upload position for commit position: ${commitPosition}`);
+    }
+}
+
+function prepareContentShellDirectory(contentShellCommitPosition)
+{
+    var contentShellPath = path.join(CACHE_PATH, contentShellCommitPosition);
+    if (utils.isDir(contentShellPath))
+        utils.removeRecursive(contentShellPath);
+    fs.mkdirSync(contentShellPath);
+    return Promise.resolve(contentShellCommitPosition);
+}
+
+function downloadContentShell(commitPosition)
+{
+    var url = `http://commondatastorage.googleapis.com/chromium-browser-snapshots/${PLATFORM}/${commitPosition}/${CONTENT_SHELL_ZIP}`;
+    console.log("Downloading content shell from:", url);
+    console.log("NOTE: Download is ~35-65 MB depending on OS");
+    return utils.fetch(url)
+        .then(writeZip)
+        .catch(onError);
+
+    function writeZip(buffer)
+    {
+        console.log("Completed download of content shell");
+        var contentShellZipPath = path.join(CACHE_PATH, commitPosition, CONTENT_SHELL_ZIP);
+        fs.writeFileSync(contentShellZipPath, buffer);
+        return contentShellZipPath;
+    }
+
+    function onError(error)
+    {
+        console.log(`Received error: ${error} trying to download content shell from url: ${url}`);
+        throw new Error("Unable to download content shell");
+    }
+}
+
+function extractContentShell(contentShellZipPath)
+{
+    console.log(`Extracting content shell zip: ${contentShellZipPath}`);
+    var unzipScriptPath = path.resolve(__dirname, "unzip.py");
+    var src = contentShellZipPath;
+    var dest = path.resolve(path.dirname(src), "out");
+    shell(`${PYTHON} ${unzipScriptPath} ${src} ${dest}`);
+    fs.unlinkSync(src);
+    var originalDirPath = path.resolve(dest, "content-shell");
+    var newDirPath = path.resolve(dest, "Release");
+    fs.renameSync(originalDirPath, newDirPath);
+    fs.chmodSync(getContentShellBinaryPath(newDirPath), "755");
+    if (process.platform === "darwin") {
+        var helperPath = path.resolve(newDirPath, "Content Shell.app", "Contents", "Frameworks", "Content Shell Helper.app", "Contents", "MacOS", "Content Shell Helper");
+        fs.chmodSync(helperPath, "755");
+    }
+    return dest;
+}
+
+function getContentShellBinaryPath(dirPath)
+{
+    if (process.platform === "linux") {
+        return path.resolve(dirPath, "content_shell");
+    }
+    if (process.platform === "win32") {
+        return path.resolve(dirPath, "content_shell.exe");
+    }
+    if (process.platform === "darwin") {
+        return path.resolve(dirPath, "Content Shell.app", "Contents", "MacOS", "Content Shell");
+    }
+}
+
+function buildAndTest(buildDirectoryPath)
+{
+    var contentShellResourcesPath = path.resolve(buildDirectoryPath, "Release", "resources");
+    build(contentShellResourcesPath);
+    if (IS_BUILD_ONLY)
+        return;
+    runTests(buildDirectoryPath);
+}
+
+function build(contentShellResourcesPath)
+{
+    var devtoolsResourcesPath = path.resolve(contentShellResourcesPath, "inspector");
+    var copiedFrontendPath = path.resolve(devtoolsResourcesPath, "front_end");
+    var debugPath = path.resolve(devtoolsResourcesPath, "debug");
+    utils.removeRecursive(copiedFrontendPath);
+    utils.removeRecursive(debugPath);
+    utils.copyRecursive(SOURCE_PATH, devtoolsResourcesPath);
+    fs.renameSync(copiedFrontendPath, debugPath);
+    var inspectorBackendCommandsPath = path.resolve(devtoolsResourcesPath, "InspectorBackendCommands.js");
+    var supportedCSSPropertiesPath = path.resolve(devtoolsResourcesPath, "SupportedCSSProperties.js");
+    utils.copy(inspectorBackendCommandsPath, debugPath);
+    utils.copy(supportedCSSPropertiesPath, debugPath);
+}
+
+function runTests(buildDirectoryPath)
+{
+    var testArgs = [
+        "--additional-drt-flag=--debug-devtools",
+        "--no-pixel-tests",
+        "--build-directory",
+        buildDirectoryPath,
+    ].concat(getInspectorTests());
+    if (IS_DEBUG_ENABLED) {
+        testArgs.push("--additional-drt-flag=--remote-debugging-port=9222");
+        testArgs.push("--time-out-ms=6000000");
+        console.log("\n=============================================");
+        console.log("Go to: http://localhost:9222/");
+        console.log("Click on link and in console execute: test()");
+        console.log("=============================================\n");
+    }
+    var args = [BLINK_TEST_PATH].concat(testArgs).concat(getTestFlags());
+    console.log(`Running layout tests with args: ${args}`);
+    childProcess.spawn(PYTHON, args, {stdio: "inherit"});
+}
+
+function getTestFlags()
+{
+    var flagValues = Object.keys(Flags).map(key => Flags[key]);
+    return process.argv
+        .slice(2)
+        .filter(arg => !utils.includes(flagValues, arg) && !utils.includes(arg, "inspector"));
+}
+
+function getInspectorTests()
+{
+    var specificTests = process.argv.filter(arg => utils.includes(arg, "inspector"));
+    if (specificTests.length)
+        return specificTests;
+    return [
+        "inspector*",
+        "http/tests/inspector*",
+    ];
+}