%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Tutorial slides on Python.

%

% Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>

% Copyright (c) 2005-2009, Prabhu Ramachandran

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\documentclass[compress,14pt]{beamer}

% \documentclass[handout]{beamer}

% \usepackage{pgfpages}

% \pgfpagesuselayout{4 on 1}[a4paper,border, shrink=5mm,landscape]

\usepackage{tikz}

\newcommand{\hyperlinkmovie}{}

%\usepackage{movie15}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Note that in presentation mode 

% \paperwidth  364.19536pt

% \paperheight 273.14662pt

% h/w = 0.888

\mode<presentation>

{

  \usetheme{Warsaw}

  %\usetheme{Boadilla}

  %\usetheme{default}

  \useoutertheme{split}

  \setbeamercovered{transparent}

}

% To remove navigation symbols

\setbeamertemplate{navigation symbols}{}

\usepackage{amsmath}

\usepackage[english]{babel}

\usepackage[latin1]{inputenc}

\usepackage{times}

\usepackage[T1]{fontenc}

% Taken from Fernando's slides.

\usepackage{ae,aecompl}

\usepackage{mathpazo,courier,euler}

\usepackage[scaled=.95]{helvet}

\usepackage{pgf}

\definecolor{darkgreen}{rgb}{0,0.5,0}

\usepackage{listings}

\lstset{language=Python,

    basicstyle=\ttfamily\bfseries,

    commentstyle=\color{red}\itshape,

  stringstyle=\color{darkgreen},

  showstringspaces=false,

  keywordstyle=\color{blue}\bfseries}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% My Macros

\setbeamercolor{postit}{bg=yellow,fg=black}

\setbeamercolor{emphbar}{bg=blue!20, fg=black}

\newcommand{\emphbar}[1]

{\begin{beamercolorbox}[rounded=true]{emphbar} 

      {#1}

 \end{beamercolorbox}

}

%{\centerline{\fcolorbox{gray!50} {blue!10}{

%\begin{minipage}{0.9\linewidth}

%    {#1} 

%\end{minipage}

%    }}}

\newcommand{\myemph}[1]{\structure{\emph{#1}}}

\newcommand{\PythonCode}[1]{\lstinline{#1}}

\newcommand{\tvtk}{\texttt{tvtk}}

\newcommand{\mlab}{\texttt{mlab}}

\newcounter{time}

\setcounter{time}{0}

\newcommand{\inctime}[1]{\addtocounter{time}{#1}{\vspace*{0.1in}\tiny \thetime\ m}}

\newcommand\BackgroundPicture[1]{%

  \setbeamertemplate{background}{%

      \parbox[c][\paperheight]{\paperwidth}{%

      \vfill \hfill

 \hfill \vfill

}}}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Configuring the theme

%\setbeamercolor{normal text}{fg=white}

%\setbeamercolor{background canvas}{bg=black}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Title page

\title[]{Test Driven Approach}

\author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}

\institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}

\date[] {11, October 2009}

\date[] % (optional)

}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%\pgfdeclareimage[height=0.75cm]{iitblogo}{iitblogo}

%\logo{\pgfuseimage{iitblogo}}

\AtBeginSection[]

{

  \begin{frame}<beamer>

    \frametitle{Outline}

      \Large

    \tableofcontents[currentsection,currentsubsection]

  \end{frame}

}

%% Delete this, if you do not want the table of contents to pop up at

%% the beginning of each subsection:

\AtBeginSubsection[]

{

  \begin{frame}<beamer>

    \frametitle{Outline}

    \tableofcontents[currentsection,currentsubsection]

  \end{frame}

}

\AtBeginSection[]

{

  \begin{frame}<beamer>

    \frametitle{Outline}

    \tableofcontents[currentsection,currentsubsection]

  \end{frame}

}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% DOCUMENT STARTS

\begin{document}

\begin{frame}

  \maketitle

\end{frame}

\section{Test Driven Approach}

\begin{frame}

    \frametitle{Testing code with \typ{nosetests}}

    \begin{itemize}

        \item Writing tests is really simple!

        \item Using nose.

        \item Example!

    \end{itemize}

\end{frame}

\begin{frame}

    \frametitle{Need of Testing!}

    \begin{itemize}

        \item Quality

        \item Regression

        \item Documentation

    \end{itemize}

\end{frame}

\begin{frame}[fragile]

    \frametitle{Nosetest}

  \begin{lstlisting}

def gcd(a, b):

    """Returns gcd of a and b, 

     handles only positive numbers."""

    if a%b == 0: return b

    return gcd(b, a%b)

def lcm(a, b):

    return a*b/gcd(a, b)

if __name__ == '__main__':

    import nose

    nose.main()

  \end{lstlisting}

\inctime{10}

\end{frame}

\begin{frame}[fragile]

    \frametitle{Example}

    \begin{block}{Problem Statement:}

      Write a function to check whether a given input

      string is a palindrome.

    \end{block}

\end{frame}

\begin{frame}[fragile]

    \frametitle{Function: palindrome.py}

\begin{lstlisting}    

def is_palindrome(input_str):

  return input_str == input_str[::-1]

\end{lstlisting}    

\end{frame}

\begin{frame}[fragile]

    \frametitle{Test for the palindrome: palindrome.py}

\begin{lstlisting}    

from plaindrome import is_palindrome

def test_function_normal_words():

  input = "noon"

  assert is_palindrome(input) == True

\end{lstlisting}    

\end{frame}

\begin{frame}[fragile]

    \frametitle{Running the tests.}

\begin{lstlisting}    

$ nosetests test.py 

.

----------------------------------------------

Ran 1 test in 0.001s

OK

\end{lstlisting}    

\end{frame}

\begin{frame}[fragile]

    \frametitle{Exercise: Including new tests.}

\begin{lstlisting}    

def test_function_ignore_cases_words():

  input = "Noon"

  assert is_palindrome(input) == True

\end{lstlisting}

     \vspace*{0.25in}

     Check\\

     \PythonCode{$ nosetests test.py} \\

     \begin{block}{Task}

     Tweak the code to pass this test.

     \end{block}

\end{frame}

%\begin{frame}[fragile]

%    \frametitle{Lets write some test!}

%\begin{lstlisting}    

%#for form of equation y=mx+c

%#given m and c for two equation,

%#finding the intersection point.

%def intersect(m1,c1,m2,c2):

%    x = (c2-c1)/(m1-m2)

%    y = m1*x+c1

%    return (x,y)

%\end{lstlisting}

%

%Create a simple test for this

%

%function which will make it fail.

%

%\inctime{15} 

%\end{frame}

%

\begin{frame}[fragile]

    \frametitle{Exercise}

    Based on Euclid's algorithm:

        $gcd(a,b)=gcd(b,b\%a)$\\

    gcd function can be written as:

    \begin{lstlisting}

    def gcd(a, b):

      if a%b == 0: return b

      return gcd(b, a%b)

    \end{lstlisting}

    \vspace*{-0.15in}

    \begin{block}{Task}

      \begin{itemize}

      \item Write at least 

        two tests for above mentioned function.

      \item Write a non recursive implementation

      of gcd(), and test it using already 

      written tests.

      \end{itemize}

    \end{block}

\inctime{15} 

\end{frame}

\begin{frame}{In this session we have covered:}

  \begin{itemize}

    \item Need for visualization.

    \item Tools available.

    \item How to follow Test Driven Approach.

  \end{itemize}

\end{frame}

\begin{frame}

    \begin{center}

        \Huge    

        Thank you!

    \end{center}

\end{frame}

\end{document}