Automated Autofill testing library + extension

components/test/data/autofill/automated_integration/task_flow.py

Index: components/test/data/autofill/automated_integration/task_flow.py
diff --git a/components/test/data/autofill/automated_integration/task_flow.py b/components/test/data/autofill/automated_integration/task_flow.py
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+++ b/components/test/data/autofill/automated_integration/task_flow.py
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+# 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.
+
+"""Chrome Autofill Task Flow
+
+Execute a set of autofill tasks in a fresh ChromeDriver instance that has been
+pre-loaded with some default profile.
+
+Requires:
+  - Selenium python bindings
+    http://selenium-python.readthedocs.org/
+
+  - ChromeDriver
+    https://sites.google.com/a/chromium.org/chromedriver/downloads
+    The ChromeDriver executable must be available on the search PATH.
+
+  - Chrome
+"""
+
+import abc
+from urlparse import urlparse
+import os
+import shutil
+from random import choice
+from string import ascii_lowercase
+
+from selenium import webdriver
+from selenium.common.exceptions import TimeoutException, WebDriverException
+from selenium.webdriver.chrome.options import Options
+
+
+class TaskFlow(object):
+  """Represents an executable set of Autofill Tasks.
+
+  Attributes:
+    profile: Dict of profile data that acts as the master source for
+      validating autofill behaviour.
+    debug: Whether debug output should be printed (False if not specified).
+  """
+  __metaclass__ = abc.ABCMeta
+  def __init__(self, profile, debug=False):
+    self.set_profile(profile)
+    self._debug = debug
+    self._running = False
+
+    self._tasks = self._generate_task_sequence()
+
+  def set_profile(self, profile):
+    """Validates |profile| before assigning it as the source of user data.
+
+    Args:
+      profile: Dict of profile data that acts as the master source for
+        validating autofill behaviour.
+
+    Raises:
+      ValueError: The |profile| dict provided is missing required keys
+    """
+    if not isinstance(profile, dict):
+      raise ValueError('profile must be a a valid dictionary');
+
+    self._profile = profile
+
+  def run(self, user_data_dir, chrome_binary=None):
+    """Generates and executes a sequence of chrome driver tasks.
+
+    Args:
+      user_data_dir: Path string for the writable directory in which profiles
+        should be stored.
+      chrome_binary: Path string to the Chrome binary that should be used by
+        ChromeDriver.
+
+        If None then it will use the PATH to find a binary.
+
+    Raises:
+      RuntimeError: Running the TaskFlow was attempted while it's already
+        running.
+      Exception: Any failure encountered while running the tests
+    """
+    if self._running:
+      raise RuntimeError('Cannot run TaskFlow when already running')
+
+    self._running = True
+
+    self._run_tasks(user_data_dir, chrome_binary=chrome_binary)
+
+    self._running = False
+
+  @abc.abstractmethod
+  def _generate_task_sequence(self):
+    """Generates a set of executable tasks that will be run in ChromeDriver.
+
+    Note: Subclasses must implement this method.
+
+    Raises:
+      NotImplementedError: Subclass did not implement the method
+
+    Returns:
+      A list of AutofillTask instances that are to be run in ChromeDriver.
+
+      These tasks are to be run in order.
+    """
+    raise NotImplementedError()
+
+  def _run_tasks(self, user_data_dir, chrome_binary=None):
+    """Runs the internal set of tasks in a fresh ChromeDriver instance.
+
+    Args:
+      user_data_dir: Path string for the writable directory in which profiles
+        should be stored.
+      chrome_binary: Path string to the Chrome binary that should be used by
+        ChromeDriver.
+
+        If None then it will use the PATH to find a binary.
+
+    Raises:
+      Exception: Any failure encountered while running the tests
+    """
+    driver = self._get_driver(user_data_dir, chrome_binary=chrome_binary)
+    try:
+      for task in self._tasks:
+        task.run(driver)
+    finally:
+      driver.quit()
+      shutil.rmtree(self._profile_dir_dst)
+
+  def _get_driver(self, user_data_dir, profile_name=None, chrome_binary=None,
+                  chromedriver_binary='chromedriver'):
+    """Spin up a ChromeDriver instance that uses a given set of user data.
+
+    Generates a temporary profile data directory using a local set of test data.
+
+    Args:
+      user_data_dir: Path string for the writable directory in which profiles
+        should be stored.
+      profile_name: Name of the profile data directory to be created/used in
+        user_data_dir.
+
+        If None then an eight character name will be generated randomly.
+
+        This directory will be removed after the task flow completes.
+      chrome_binary: Path string to the Chrome binary that should be used by
+        ChromeDriver.
+
+        If None then it will use the PATH to find a binary.
+
+    Returns: The generated Chrome Driver instance.
+    """
+    options = Options()
+
+    if profile_name is None:
+      profile_name = ''.join(choice(ascii_lowercase) for i in range(8))
+
+    options.add_argument('--profile-directory=%s' % profile_name)
+
+    full_path = os.path.realpath(__file__)
+    path, filename = os.path.split(full_path)
+    profile_dir_src = os.path.join(path, 'testdata', 'Default')
+    self._profile_dir_dst = os.path.join(user_data_dir, profile_name)
+    self._copy_tree(profile_dir_src, self._profile_dir_dst)
+
+    if chrome_binary is not None:
+      options.binary_location = chrome_binary
+
+    options.add_argument('--user-data-dir=%s' % user_data_dir)
+    options.add_argument('--show-autofill-type-predictions')
+
+    service_args = []
+
+    driver = webdriver.Chrome(executable_path=chromedriver_binary,
+                              chrome_options=options,
+                              service_args=service_args)
+    driver.set_page_load_timeout(15)  # seconds
+    return driver
+
+  def _copy_tree(self, src, dst):
+    """Recursively copy a directory tree.
+
+    If the destination directory does not exist then it will be created for you.
+    Doesn't overwrite newer existing files.
+
+    Args:
+      src: Path to the target source directory. It must exist.
+      dst: Path to the target destination directory. Permissions to create the
+        the directory (if necessary) and modify it's contents.
+    """
+    if not os.path.exists(dst):
+      os.makedirs(dst)
+    for item in os.listdir(src):
+      src_item = os.path.join(src, item)
+      dst_item = os.path.join(dst, item)
+      if os.path.isdir(src_item):
+        self._copy_tree(src_item, dst_item)
+      elif (not os.path.exists(dst_item) or
+        os.stat(src_item).st_mtime - os.stat(dst_item).st_mtime > 1):
+        # Copy a file if it doesn't already exist, or if existing one is older.
+        shutil.copy2(src_item, dst_item)