#+LaTeX_CLASS: beamer
#+LaTeX_CLASS_OPTIONS: [presentation]
#+BEAMER_FRAME_LEVEL: 1

#+BEAMER_HEADER_EXTRA: \usetheme{Warsaw}\usecolortheme{default}\useoutertheme{infolines}\setbeamercovered{transparent}
#+COLUMNS: %45ITEM %10BEAMER_env(Env) %10BEAMER_envargs(Env Args) %4BEAMER_col(Col) %8BEAMER_extra(Extra)
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#+LaTeX_CLASS: beamer
#+LaTeX_CLASS_OPTIONS: [presentation]

#+LaTeX_HEADER: \usepackage[english]{babel} \usepackage{ae,aecompl}
#+LaTeX_HEADER: \usepackage{mathpazo,courier,euler} \usepackage[scaled=.95]{helvet}

#+LaTeX_HEADER: \usepackage{listings}

#+LaTeX_HEADER:\lstset{language=Python, basicstyle=\ttfamily\bfseries,
#+LaTeX_HEADER:  commentstyle=\color{red}\itshape, stringstyle=\color{red},
#+LaTeX_HEADER:  showstringspaces=false, keywordstyle=\color{blue}\bfseries}

#+TITLE:     Testing and debugging
#+AUTHOR:    FOSSEE
#+EMAIL:     
#+DATE:    

#+DESCRIPTION: 
#+KEYWORDS: 
#+LANGUAGE:  en
#+OPTIONS:   H:3 num:nil toc:nil \n:nil @:t ::t |:t ^:t -:t f:t *:t <:t
#+OPTIONS:   TeX:t LaTeX:nil skip:nil d:nil todo:nil pri:nil tags:not-in-toc

* Outline 
  - What software Testing is? 
  - Learn to test simple functions for their functionality.
  - Learn how to automate tests. 
  -  Need for coding style and some of the standards followed by the Python Community.
  -  Handling Errors and Exceptions.


* gcd function
  - Create gcd.py file with:
#+begin_LaTeX
\begin{lstlisting}[language=python]
  def gcd(a, b):
        if a % b == 0: 
            return b
        return gcd(b, a%b)
\end{lstlisting}
#+end_LaTeX

* Test for gcd.py
  - Edit gcd.py file
#+begin_LaTeX
\begin{lstlisting}[language=python]

  def gcd(a, b):
      if b == 0:
          return a
      return gcd(b, a%b)
  
  if __name__=='__main__':
      result = gcd(48, 64)
      if result != 16:
          print "Test failed"
      print "Test Passed"
\end{lstlisting}
#+end_LaTeX

* Automating tests
#+begin_LaTeX
\begin{lstlisting}[language=python]

    if __name=__='__main__':
    for line in open('numbers.txt'):
        numbers = line.split()
        x = int(numbers[0])
        y = int(numbers[1])
        result = int(numbers[2])
        if gcd(x, y) != result:
            print "Failed gcd test
                          for", x, y
\end{lstlisting}
#+end_LaTeX