Please stay healthy!

Remote Lectures

All Meetings

https://calendly.com/haehn

https://umassboston.zoom.us/my/haehn

Schedule here:

Revised Project Proposals

Daniel's Feedback

Loraine's Feedback

https://calendly.com/haehn

Schedule here:

Please schedule a group meeting!

very soon

Containers

Can we run applications with a GUI?

https://cuneyt.aliustaoglu.biz/en/running-gui-applications-in-docker-on-windows-linux-mac-hosts/

Can a docker run a windows application on linux?

Like this Virtual Machine..

Host System

Container

Container kernel needs to match host system.

WSL 2 uses the latest and greatest in virtualization technology to run its Linux kernel inside of a lightweight utility virtual machine (VM).

https://docs.microsoft.com/en-us/windows/wsl/wsl2-about

So why is Docker cool?

much more lightweight than VirtualMachines

runs on cloud services

it can scale!

Docker Swarm

Kubernetes

FROM ubuntu:18.04

MAINTAINER Daniel Haehn version: 0.1


ADD converter.cc converter.cc

RUN apt-get update
RUN apt-get install -y g++
RUN g++ -o converter converter.cc

ENTRYPOINT ["./converter"]

Dockerfile

$ docker pull haehn/cs410converter
$ docker run -it haehn/cs410converter

$ pip install trako

https://pypi.org/project/trako/

https://github.com/haehn/trako

$ python setup.py sdist

$ twine upload dist/trako-0.3.1*

Testing

Testing means checking code for bugs..

Manual Testing

Automatic Testing

Explanatory Testing

Unit Testing

Chapters 7, 8, 9

Integration Testing

System Testing

https://medium.com/@Colin_But/define-testing-strategy-using-the-testing-pyramid-1dabee37e823

System Tests

Testing Pyramid

Unit Tests

test individual functions

def inc(x):
    return x + 1

def test_inc():
    assert inc(4) == 5

def test_inc3():
    assert inc('a') == 'b'

def test_inc2():
    assert inc(-1) == 0

throws exceptions

def test_inc4():
    assert inc('a') == 'a1'

# assert(a == b)

if not a==b:
  throw Error()

import sys

def inc(x):
    
    return x+1
    
largestInt = sys.maxint

print ( largestInt )

print ( inc( largestInt ) )

Python handles it!

Test Driven Development

http://muralikrishnannair.blogspot.com/2013/06/simple-example-for-using-junit-with.html

JUnit

pytest

https://pytest.org

$ pytest
=========================== test session starts ============================
platform linux -- Python 3.x.y, pytest-5.x.y, py-1.x.y, pluggy-0.x.y
cachedir: $PYTHON_PREFIX/.pytest_cache
rootdir: $REGENDOC_TMPDIR
collected 1 item

test_sample.py F                                                     [100%]

================================= FAILURES =================================
_______________________________ test_answer ________________________________

    def test_answer():
>       assert inc(3) == 5
E       assert 4 == 5
E        +  where 4 = inc(3)

test_sample.py:6: AssertionError
========================= short test summary info ==========================
FAILED test_sample.py::test_answer - assert 4 == 5
============================ 1 failed in 0.12s =============================

# content of test_sample.py
def inc(x):
    return x + 1


def test_answer():
    assert inc(3) == 5

https://github.com/google/googletest

#include <cassert>

int main()
{
  assert(1==2);
  std::cout << "Will never be reached.";
}

Integration Testing

def test_some_method(parameter):
  '''
  '''

  # return true or false

def test_setup():
  '''
  '''

  # connect to database
  # or span server

def test_teardown():
  '''
  '''

  # delete temporary files
  # or close database connection

1. Setup

2. Test

3. Teardown

System Testing

Test of the full product

End-to-end Testing

Blackbox Testing

Whitebox Testing

Internals

Externals without knowledge

about what is going on inside

UI Testing

https://www.selenium.dev

from selenium import webdriver

def test_google():
  
  driver = webdriver.Chrome()
  driver.maximize_window()
  driver.get("https://google.com")

  searchtext = driver.find_element_by_id("searchtext")
  searchtext.send_keys("CS410")
  
  submitbutton = driver.find_element_by_id("submit")
  submitbutton.click()
  
  driver.save_screenshot("/tmp/shot.png")

UI Testing

https://pptr.dev

Control a web-browser

https://try-puppeteer.appspot.com/