#Test framework

Test harness makes use of USB-CDC serial (on RT1051 target) or pseudo-tty (on Linux) to communicate with service-desktop service in the operating system and get data from the internal database and device status.

Both service-desktop and functional tests are using pyTest - a testing framework written for Python. Convenient usage of pre-defined fixtures and harness API enables quick development of further tests.

#Test harness API

As a part of the test bundle, test harness is responsible for low-level communication with target or linux simulator. As for now, it consists of the following methods that can be used during writing tests:

• Harness(port_name)

  constructor used to create Harness object and open a serial connection to the operating system

• get_connection()

  returns a CDCSerial object - wrapper for Python's Serial

• get_window_name()

  returns current application(window) name

• with_phone_unlocked(func)

  decorator allowing to call a function with an unlocked operating system

• open_application(application: str)

  opens application from main screen (unlocked phone with clock on top)

  possible valid arguments: phone, contacts, messages, music, meditation, settings, tools, alarm, calendar

• send_text(text: str)

  emulates sending text using numpad presses to the text window (eg. SMS)

• send_number(number: str)

  emulates sending numbers to the number window (eg. contact number)

• endpoint_request(ep_name: str, met: str, body: dict) -> dict

  method used to send endpoint request to the service-desktop API and gather requested data from the operating system

  • ep_name - valid options: deviceInfo, update, filesystemUpload, backup, restore, factory, contacts, messages, calllog, events, developerMode
  • met - HTTP methods: get, post, put, del
  • body - JSON payload

#CDCSerial API

CDCSerial is Serial wrapper intended to encapsulate commands and data into communication protocol thus allowing to seamlessly transfer data between Harness and the operating system. It has the following user-applicable methods:

• send_key(key_code, key_type=Keytype.short_press, wait=10)

  emulates sending one keypress as short press (by default) or as a long press (with Keytype.long_press argument)

  • key_code - value of character from harness.interface.defs.key_codes array, for numbers 0-9 just ASCII value
  • wait - timeout

• send_at(at_command: str, wait=10)

  send AT command to the Cellular module, returns AT response

  • at_command - string with AT command, without any terminator
  • wait - timeout

#Example

from harness.harness import Harness
from harness.interface.defs import key_codes

port_name = "/dev/ttyACM0"

# init Harness object and open serial port
harness = Harness(port_name)

#get current application name
current_window = harness.get_window_name()

#open messages when phone is unlocked
@harness.with_phone_unlocked()
def do_after_unlock(connection):
    harness.open_application("messages")
    #send joystick down keypress
    connection.send_key(key_codes["down"])

#pyTest running

To execute pyTest test cases make sure that you have installed the pyTest package and you have python3. It is recommended to execute those tests in a virtual environment (eg. in test dir):

pip3 install virtualenv 
virtualenv -p python3 test_env
source test_env/bin/activate
pip3 install -r requirements.txt

and then execute the tests (located in pytest subdirectory and below):

pytest ./pytest --port=/dev/ttyACM2 --timeout=20

by default, call and message sending tests are enabled thus you have to provide additional parameters:

--phone_number=123456789 --call_duration=30 --sms_text="sms text"

which gives full command like this:

pytest ./pytest --port=/dev/ttyACM2 --timeout=20  --phone_number=123456789 --call_duration=30 --sms_text="sms text"

To run the tests with Linux simulator just pass simulator as the port parameter and use -m switch with marker negation:

pytest ./pytest --port=simulator --timeout=20 -m "not rt1051"

timeout parameter sets port discovery timeout in seconds (if after this timeout port is not available, pyTest will exit).

After finished test session just call:

deactivate

to exit the virtual environment.

#sample pyTest test

All tests in the default configuration of pyTest require test files starting with test_ and test functions also starting with test_. To use fixture like harness, just pass it as an argument to the test function:

test_first_sample_test.py

def test_sample_test(harness):
    body = {}
    ret = harness.endpoint_request("deviceInfo", "get", body)
    assert ret["status"] == 200

All tests written in this manner will be found by pyTest.

#Notice: all tests that are applicable only to the target should be marked with a @pytest.mark.rt1051 decorator