# This Source Code Form is subject to the terms of the Mozilla Public

# License, v. 2.0. If a copy of the MPL was not distributed with this

# file, You can obtain one at http://mozilla.org/MPL/2.0/.

import json

import os

from io import open

_DEFAULT_SCRIPT = os.path.join(

os.path.dirname(__file__), "node_modules", "axe-core", "axe.min.js"

)

class Axe(object):

def __init__(self, selenium, script_url=_DEFAULT_SCRIPT):

self.script_url = script_url

self.selenium = selenium

def inject(self):

"""

Recursively inject aXe into all iframes and the top level document.

:param script_url: location of the axe-core script.

:type script_url: string

"""

with open(self.script_url, "r", encoding="utf8") as f:

self.selenium.execute_script(f.read())

def run(self, context=None, options=None):

"""

Run axe against the current page.

:param context: which page part(s) to analyze and/or what to exclude.

:param options: dictionary of aXe options.

"""

template = (

"var callback = arguments[arguments.length - 1];"

+ "axe.run(%s).then(results => callback(results))"

)

args = ""

# If context parameter is passed, add to args

if context is not None:

args += "%r" % context

# Add comma delimiter only if both parameters are passed

if context is not None and options is not None:

args += ","

# If options parameter is passed, add to args

if options is not None:

args += "%s" % options

command = template % args

response = self.selenium.execute_async_script(command)

return response

def report(self, violations):

"""

Return readable report of accessibility violations found.

:param violations: Dictionary of violations.

:type violations: dict

:return report: Readable report of violations.

:rtype: string

"""

string = ""

string += "Found " + str(len(violations)) + " accessibility violations:"

for violation in violations:

string += (

"\n\n\nRule Violated:\n"

+ violation["id"]

+ " - "

+ violation["description"]

+ "\n\tURL: "

+ violation["helpUrl"]

+ "\n\tImpact Level: "

+ violation["impact"]

+ "\n\tTags:"

)

for tag in violation["tags"]:

string += " " + tag

string += "\n\tElements Affected:"

i = 1

for node in violation["nodes"]:

for target in node["target"]:

string += "\n\t" + str(i) + ") Target: " + target

i += 1

for item in node["all"]:

string += "\n\t\t" + item["message"]

for item in node["any"]:

string += "\n\t\t" + item["message"]

for item in node["none"]:

string += "\n\t\t" + item["message"]

string += "\n\n\n"

return string

def write_results(self, data, name=None):

"""

Write JSON to file with the specified name.

:param name: Path to the file to be written to. If no path is passed

a new JSON file "results.json" will be created in the

current working directory.

:param output: JSON object.

"""

if name:

filepath = os.path.abspath(name)

else:

filepath = os.path.join(os.path.getcwd(), "results.json")

with open(filepath, "w", encoding="utf8") as f:

try:

f.write(unicode(json.dumps(data, indent=4)))

except NameError:

f.write(json.dumps(data, indent=4))