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# Copyright 2016 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Module to generate a test file with random calls to the Web Bluetooth API."""
import random
from fuzzer_helpers import FillInParameter
# Contains the different types of base tokens used when generating a test case.
BASE_TOKENS = [
'TRANSFORM_BASIC_BASE',
'TRANSFORM_DEVICE_DISCOVERY_BASE',
'TRANSFORM_CONNECTABLE_BASE',
'TRANSFORM_SERVICES_RETRIEVED_BASE',
'TRANSFORM_CHARACTERISTICS_RETRIEVED_BASE',
]
# Contains strings that represent calls to the Web Bluetooth API. These
# strings can be sequentially placed together to generate sequences of
# calls to the API. These strings are separated by line and placed so
# that indentation can be performed more easily.
TOKENS = [
[
'})',
'.catch(e => console.log(e.name + \': \' + e.message))',
'.then(() => {',
],
# Request Device Tokens
[' requestDeviceWithKeyDown(TRANSFORM_REQUEST_DEVICE_OPTIONS);'],
[
' return requestDeviceWithKeyDown(TRANSFORM_REQUEST_DEVICE_OPTIONS);',
'})',
'.then(device => {',
],
# Connect Tokens
[
' device.gatt.connect();',
],
[
' return device.gatt.connect();',
'})'
'.then(gatt => {',
],
[
' gatt.connect();',
],
[
' return gatt.connect();',
'})'
'.then(gatt => {',
],
# GetPrimaryService(s) Tokens
[
' device.gatt.TRANSFORM_GET_PRIMARY_SERVICES;',
],
[
' gatt.TRANSFORM_GET_PRIMARY_SERVICES;',
],
[
' return device.gatt.TRANSFORM_GET_PRIMARY_SERVICES;',
'})'
'.then(services => {',
],
[
' return gatt.TRANSFORM_GET_PRIMARY_SERVICES;',
'})'
'.then(services => {',
],
# GetCharacteristic(s) Tokens
[
' TRANSFORM_PICK_A_SERVICE;',
' service.TRANSFORM_GET_CHARACTERISTICS;',
],
[
' TRANSFORM_PICK_A_SERVICE;',
' return service.TRANSFORM_GET_CHARACTERISTICS;',
],
# ReadValue Tokens
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' characteristic.readValue();',
],
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' return characteristic.readValue().then(_ => characteristics);',
'})',
'.then(characteristics => {',
],
# WriteValue Tokens
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' characteristic.writeValue(TRANSFORM_VALUE);',
],
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' return characteristic.writeValue(TRANSFORM_VALUE).then(_ => characteristics);',
'})',
'.then(characteristics => {',
],
# Start Notifications Tokens
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' characteristic.startNotifications();',
],
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' return characteristic.startNotitications().then(_ => characteristics);',
'})',
'.then(characteristics => {',
],
# Stop Notifications Tokens
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' characteristic.stopNotifications();',
],
[
' TRANSFORM_PICK_A_CHARACTERISTIC;',
' return characteristic.stopNotitications().then(() => characteristics);',
'})',
'.then(characteristics => {',
],
# Garbage Collection
[
' runGarbageCollection();',
],
[
'})',
'.then(runGarbageCollection)',
'.then(() => {',
],
# Reload Tokens
# We generate a unique id for each reload and save it in sessionStorage.
# This ensures that the reload is only executed once and that if test cases
# share the same sessionStorage all their reloads are executed.
[
' (() => {',
' let reload_id = TRANSFORM_RELOAD_ID;',
' if (!sessionStorage.getItem(reload_id)) {',
' sessionStorage.setItem(reload_id, true);',
' location.reload();',
' }',
' })();',
],
]
INDENT = ' '
BREAK = '\n'
END_TOKEN = '});'
# Maximum number of tokens that will be inserted in the generated
# test case.
MAX_NUM_OF_TOKENS = 100
def _GenerateSequenceOfRandomTokens():
"""Generates a sequence of calls to the Web Bluetooth API.
Uses the arrays of strings in TOKENS and randomly picks a number between
[1, 100] to generate a random sequence of calls to the Web Bluetooth API,
calls to reload the page, and calls to perform garbage collection.
Returns:
A string containing a sequence of calls to the Web Bluetooth API.
"""
result = random.choice(BASE_TOKENS)
for _ in range(random.randint(1, MAX_NUM_OF_TOKENS)):
# Get random token.
token = random.choice(TOKENS)
# Indent and break line.
for line in token:
result += INDENT + line + BREAK
result += INDENT + END_TOKEN
return result
def GenerateTestFile(template_file_data):
"""Inserts a sequence of calls to the Web Bluetooth API into a template.
Args:
template_file_data: A template containing the 'TRANSFORM_RANDOM_TOKENS'
string.
Returns:
A string consisting of template_file_data with the string
'TRANSFORM_RANDOM_TOKENS' replaced with a sequence of calls to the Web
Bluetooth API and calls to reload the page and perform garbage
collection.
"""
return FillInParameter('TRANSFORM_RANDOM_TOKENS',
_GenerateSequenceOfRandomTokens, template_file_data)
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