Android Comms Test Suite

The Android Comms Test Suite, is a lightweight Python-based automation tool set that is used to perform automated testing of current and upcoming Android devices. It provides a simple execution interface; a set of pluggable libraries for accessing commercially avilable devices, Android devices, and a collection of utility functions to further ease test development. It is an ideal desktop tool for a wireless stack developer or integrator whether exercising a new code path, performing sanity testing, or running extended regression test suites.

Included in the tests/google directory are a bundle of tests, many of which can be run with as little as one or two Android devices with wifi, cellular, or bluetooth connectivity, including:

1. Wifi tests for access point interopability, enterprise server integration, WiFi scanning, WiFi auto join, and round trip time.
2. Bluetooth tests for low energy, GATT, SPP, and bonding.
3. Cellular tests for circuit switch and IMS calling, data connectivity, messaging, network switching, and WiFi hotspot.

ACTS follows the Google Open-source Python Style Guide, and it is recommended for all new test cases.

System dependencies:

• adb
• python3.4+
• python3.4-setuptools

Python dependencies (installed automatically by setup.py):

• future
• pyserial

To run unit tests: $ python3 setup.py test $ python setup.py test

ACTS Execution Flow Overview

Below is a high level view of the ACTS flow:

1. Read configuration files
2. Create controllers
3. Sequentially execute test classes

FooTest.setup_class()
FooTest.setup_test()
FooTest.test_A()
FooTest.teardown_test()
FooTest.setup_test()
FooTest.test_B()
FooTest.teardown_test()
....
FooTest.teardown_class()
BarTest.setup_class()
....

4. Destroy controllers

Preparing an Android Device

Allow USB Debugging

USB debugging must be enabled before a device can take commands from adb. To enable USB debugging, first enable developer mode.

1. Go to Settings->About phone
2. Tap Build number repeatedly until "You're a developer now" is displayed.

In developer mode:

1. Plug the device into a computer (host)
2. Run $adb devices

• A pop-up asking to allow the host to access the android device may be displayed. Check the "Always" box and click "Yes".

ACTS Setup

1. Install the system dependencies. On Ubuntu, sudo apt-get install python3.4 python3-setuptools
2. Run "python3.4 setup.py install" with elevated permissions
3. To verify ACTS is ready to go, at the location for README, and run: cd tests/ && act.py -c acts_sanity_test_config.json -tc IntegrationTest

After installation, act.py will be in usr/bin and can be called as command line utilities. Components in ACTS are importable under the package "acts." in Python, for example:

$ python
>>> from acts.controllers import android_device
>>> device_list = android_device.get_all_instances()

Breaking Down a Sample Command

Above, the command act.py -c acts_sanity_test_config.json -tc IntegrationTest was run to verify ACTS was properly set up. Below are the components of that command:

• acts.py: is the script that runs the test
• -c acts_sanity_test_config: is the flag and name of the configuration file to be used in the test
• -tc IntegrationTest: is the name of the test case

Configuration Files

To run tests, required information must be provided via a json-formatted text file. The required information includes a list of testbed configs. Each specifies the hardware, services, the path to the logs directory, and a list of paths where the python test case files are located. Below are the contents of a sample configuration file:

{   "_description": "This is an example skeleton test configuration file.",
    "testbed":
    [
        {
            "_description": "Sample testbed with no devices",
            "name": "SampleTestBed"
        }
    ],
    "logpath": "/tmp/logs",
    "testpaths": ["../tests/sample"],
    "custom_param1": {"favorite_food": "Icecream!"}
}

The testpaths and logpath keys may alternately be supplied via the execution environment though the ACTS_TESTPATHS and ACTS_LOGPATH keys respectively. To specify multiple test paths, the key should follow standard a ':'-delimited format. Explicit keys in a configuration file will override any defaults provided by the environment.

Test Class

Test classes are instantiated with a dictionary of “controllers”. The controllers dictionary contains all resources provided to the test class and are created based on the provided configuration file.

Test classes must also contain an iterable member self.tests that lists the test case names within the class. More on this is discussed after the following code snippet.

from acts.base_test import BaseTestClass

class SampleTest(BaseTestClass):

    def __init__(self, controllers):
        BaseTestClass.__init__(self, controllers)
        self.tests = (
            "test_make_toast",
        )

    """Tests"""
    def test_make_toast(self):
        for ad in self.android_devices:
            ad.droid.makeToast("Hello World.")
        return True

By default all test cases listed in a Test Class's self.tests will be run. Using the syntax below will override the default behavior by executing only specific tests within a test class.

The following will run a single test, test_make_toast:

$ act.py -c sample_config.txt -tb SampleTestBed -tc SampleTest:test_make_toast

Multiple tests may be specified with a comma-delimited list. The following will execute test_make_toast and test_make_bagel:

• $ act.py -c sample_config.txt -tb SampleTestBed -tc SampleTest:test_make_toast,test_make_bagel