day2/tda.tex
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     1 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
     2 % Tutorial slides on Python.
       
     3 %
       
     4 % Author: Prabhu Ramachandran <prabhu at aero.iitb.ac.in>
       
     5 % Copyright (c) 2005-2009, Prabhu Ramachandran
       
     6 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
     7 
       
     8 \documentclass[compress,14pt]{beamer}
       
     9 % \documentclass[handout]{beamer}
       
    10 % \usepackage{pgfpages}
       
    11 % \pgfpagesuselayout{4 on 1}[a4paper,border, shrink=5mm,landscape]
       
    12 \usepackage{tikz}
       
    13 \newcommand{\hyperlinkmovie}{}
       
    14 %\usepackage{movie15}
       
    15 
       
    16 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
    17 % Note that in presentation mode 
       
    18 % \paperwidth  364.19536pt
       
    19 % \paperheight 273.14662pt
       
    20 % h/w = 0.888
       
    21 
       
    22 
       
    23 \mode<presentation>
       
    24 {
       
    25   \usetheme{Warsaw}
       
    26   %\usetheme{Boadilla}
       
    27   %\usetheme{default}
       
    28   \useoutertheme{split}
       
    29   \setbeamercovered{transparent}
       
    30 }
       
    31 
       
    32 % To remove navigation symbols
       
    33 \setbeamertemplate{navigation symbols}{}
       
    34 
       
    35 \usepackage{amsmath}
       
    36 \usepackage[english]{babel}
       
    37 \usepackage[latin1]{inputenc}
       
    38 \usepackage{times}
       
    39 \usepackage[T1]{fontenc}
       
    40 
       
    41 % Taken from Fernando's slides.
       
    42 \usepackage{ae,aecompl}
       
    43 \usepackage{mathpazo,courier,euler}
       
    44 \usepackage[scaled=.95]{helvet}
       
    45 \usepackage{pgf}
       
    46 
       
    47 \definecolor{darkgreen}{rgb}{0,0.5,0}
       
    48 
       
    49 \usepackage{listings}
       
    50 \lstset{language=Python,
       
    51     basicstyle=\ttfamily\bfseries,
       
    52     commentstyle=\color{red}\itshape,
       
    53   stringstyle=\color{darkgreen},
       
    54   showstringspaces=false,
       
    55   keywordstyle=\color{blue}\bfseries}
       
    56 
       
    57 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
    58 % My Macros
       
    59 \setbeamercolor{postit}{bg=yellow,fg=black}
       
    60 \setbeamercolor{emphbar}{bg=blue!20, fg=black}
       
    61 \newcommand{\emphbar}[1]
       
    62 {\begin{beamercolorbox}[rounded=true]{emphbar} 
       
    63       {#1}
       
    64  \end{beamercolorbox}
       
    65 }
       
    66 %{\centerline{\fcolorbox{gray!50} {blue!10}{
       
    67 %\begin{minipage}{0.9\linewidth}
       
    68 %    {#1} 
       
    69 %\end{minipage}
       
    70 %    }}}
       
    71 
       
    72 \newcommand{\myemph}[1]{\structure{\emph{#1}}}
       
    73 \newcommand{\PythonCode}[1]{\lstinline{#1}}
       
    74 
       
    75 \newcommand{\tvtk}{\texttt{tvtk}}
       
    76 \newcommand{\mlab}{\texttt{mlab}}
       
    77 
       
    78 \newcounter{time}
       
    79 \setcounter{time}{0}
       
    80 \newcommand{\inctime}[1]{\addtocounter{time}{#1}{\vspace*{0.1in}\tiny \thetime\ m}}
       
    81 
       
    82 \newcommand\BackgroundPicture[1]{%
       
    83   \setbeamertemplate{background}{%
       
    84       \parbox[c][\paperheight]{\paperwidth}{%
       
    85       \vfill \hfill
       
    86  \hfill \vfill
       
    87 }}}
       
    88 
       
    89 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
    90 % Configuring the theme
       
    91 %\setbeamercolor{normal text}{fg=white}
       
    92 %\setbeamercolor{background canvas}{bg=black}
       
    93 
       
    94 
       
    95 
       
    96 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
    97 % Title page
       
    98 \title[]{Test Driven Approach}
       
    99 
       
   100 \author[FOSSEE Team] {Asokan Pichai\\Prabhu Ramachandran}
       
   101 
       
   102 \institute[IIT Bombay] {Department of Aerospace Engineering\\IIT Bombay}
       
   103 \date[] {11, October 2009}
       
   104 \date[] % (optional)
       
   105 }
       
   106 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
   107 
       
   108 %\pgfdeclareimage[height=0.75cm]{iitblogo}{iitblogo}
       
   109 %\logo{\pgfuseimage{iitblogo}}
       
   110 
       
   111 \AtBeginSection[]
       
   112 {
       
   113   \begin{frame}<beamer>
       
   114     \frametitle{Outline}
       
   115       \Large
       
   116     \tableofcontents[currentsection,currentsubsection]
       
   117   \end{frame}
       
   118 }
       
   119 
       
   120 %% Delete this, if you do not want the table of contents to pop up at
       
   121 %% the beginning of each subsection:
       
   122 \AtBeginSubsection[]
       
   123 {
       
   124   \begin{frame}<beamer>
       
   125     \frametitle{Outline}
       
   126     \tableofcontents[currentsection,currentsubsection]
       
   127   \end{frame}
       
   128 }
       
   129 
       
   130 \AtBeginSection[]
       
   131 {
       
   132   \begin{frame}<beamer>
       
   133     \frametitle{Outline}
       
   134     \tableofcontents[currentsection,currentsubsection]
       
   135   \end{frame}
       
   136 }
       
   137 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
       
   138 % DOCUMENT STARTS
       
   139 \begin{document}
       
   140 
       
   141 \begin{frame}
       
   142   \maketitle
       
   143 \end{frame}
       
   144 
       
   145 \section{Test Driven Approach}
       
   146 
       
   147 \begin{frame}
       
   148     \frametitle{Testing code with \typ{nosetests}}
       
   149    
       
   150     \begin{itemize}
       
   151         \item Writing tests is really simple!
       
   152 
       
   153         \item Using nose.
       
   154 
       
   155         \item Example!
       
   156     \end{itemize}
       
   157 \end{frame}
       
   158 
       
   159 \begin{frame}
       
   160     \frametitle{Need of Testing!}
       
   161    
       
   162     \begin{itemize}
       
   163         \item Quality
       
   164 
       
   165         \item Regression
       
   166 
       
   167         \item Documentation
       
   168     \end{itemize}
       
   169 \end{frame}
       
   170 
       
   171 \begin{frame}[fragile]
       
   172     \frametitle{Nosetest}
       
   173   \begin{lstlisting}
       
   174 def gcd(a, b):
       
   175     """Returns gcd of a and b, 
       
   176      handles only positive numbers."""
       
   177     if a%b == 0: return b
       
   178     return gcd(b, a%b)
       
   179 def lcm(a, b):
       
   180     return a*b/gcd(a, b)
       
   181 
       
   182 if __name__ == '__main__':
       
   183     import nose
       
   184     nose.main()
       
   185   \end{lstlisting}
       
   186 \inctime{10}
       
   187 \end{frame}
       
   188 
       
   189 \begin{frame}[fragile]
       
   190     \frametitle{Example}
       
   191     \begin{block}{Problem Statement:}
       
   192       Write a function to check whether a given input
       
   193       string is a palindrome.
       
   194     \end{block}
       
   195 \end{frame}
       
   196 
       
   197 \begin{frame}[fragile]
       
   198     \frametitle{Function: palindrome.py}
       
   199 \begin{lstlisting}    
       
   200 def is_palindrome(input_str):
       
   201   return input_str == input_str[::-1]
       
   202 \end{lstlisting}    
       
   203 \end{frame}
       
   204 
       
   205 \begin{frame}[fragile]
       
   206     \frametitle{Test for the palindrome: palindrome.py}
       
   207 \begin{lstlisting}    
       
   208 from plaindrome import is_palindrome
       
   209 def test_function_normal_words():
       
   210   input = "noon"
       
   211   assert is_palindrome(input) == True
       
   212 \end{lstlisting}    
       
   213 \end{frame}
       
   214 
       
   215 \begin{frame}[fragile]
       
   216     \frametitle{Running the tests.}
       
   217 \begin{lstlisting}    
       
   218 $ nosetests test.py 
       
   219 .
       
   220 ----------------------------------------------
       
   221 Ran 1 test in 0.001s
       
   222 
       
   223 OK
       
   224 \end{lstlisting}    
       
   225 \end{frame}
       
   226 
       
   227 \begin{frame}[fragile]
       
   228     \frametitle{Exercise: Including new tests.}
       
   229 \begin{lstlisting}    
       
   230 def test_function_ignore_cases_words():
       
   231   input = "Noon"
       
   232   assert is_palindrome(input) == True
       
   233 \end{lstlisting}
       
   234      \vspace*{0.25in}
       
   235      Check\\
       
   236      \PythonCode{$ nosetests test.py} \\
       
   237      \begin{block}{Task}
       
   238      Tweak the code to pass this test.
       
   239      \end{block}
       
   240 \end{frame}
       
   241 
       
   242 %\begin{frame}[fragile]
       
   243 %    \frametitle{Lets write some test!}
       
   244 %\begin{lstlisting}    
       
   245 %#for form of equation y=mx+c
       
   246 %#given m and c for two equation,
       
   247 %#finding the intersection point.
       
   248 %def intersect(m1,c1,m2,c2):
       
   249 %    x = (c2-c1)/(m1-m2)
       
   250 %    y = m1*x+c1
       
   251 %    return (x,y)
       
   252 %\end{lstlisting}
       
   253 %
       
   254 %Create a simple test for this
       
   255 %
       
   256 %function which will make it fail.
       
   257 %
       
   258 %\inctime{15} 
       
   259 %\end{frame}
       
   260 %
       
   261 
       
   262 \begin{frame}[fragile]
       
   263     \frametitle{Exercise}
       
   264     Based on Euclid's theorem:
       
   265         $gcd(a,b)=gcd(b,b\%a)$\\
       
   266     gcd function can be written as:
       
   267     \begin{lstlisting}
       
   268     def gcd(a, b):
       
   269       if a%b == 0: return b
       
   270       return gcd(b, a%b)
       
   271     \end{lstlisting}
       
   272     \begin{block}{Task}
       
   273       For given gcd implementation write
       
   274       at least two tests.
       
   275     \end{block}
       
   276     \begin{block}{Task}
       
   277       Write a non recursive implementation
       
   278       of gcd(), and test it using already 
       
   279       written tests.
       
   280     \end{block}
       
   281     
       
   282 \inctime{15} 
       
   283 \end{frame}
       
   284 
       
   285 \begin{frame}{In this session we have covered:}
       
   286   \begin{itemize}
       
   287     \item Need for visualization.
       
   288     \item Tools available.
       
   289     \item How to follow Test Driven Approach.
       
   290   \end{itemize}
       
   291 \end{frame}
       
   292 \begin{frame}
       
   293     \begin{center}
       
   294         \Huge    
       
   295         Thank you!
       
   296     \end{center}
       
   297 \end{frame}
       
   298 
       
   299 \end{document}