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    <p>If I get what you want; this might get you started:</p> <p>A mix of bash + external tools like diff.</p> <pre><code>#!/bin/bash # If number of arguments less then 1; print usage and exit if [ $# -lt 1 ]; then printf "Usage: %s &lt;application&gt;\n" "$0" &gt;&amp;2 exit 1 fi bin="$1" # The application (from command arg) diff="diff -iad" # Diff command, or what ever # An array, do not have to declare it, but is supposedly faster declare -a file_base=("file1" "file2" "file3") # Loop the array for file in "${file_base[@]}"; do # Padd file_base with suffixes file_in="$file.in" # The in file file_out_val="$file.out" # The out file to check against file_out_tst="$file.out.tst" # The outfile from test application # Validate infile exists (do the same for out validate file) if [ ! -f "$file_in" ]; then printf "In file %s is missing\n" "$file_in" continue; fi if [ ! -f "$file_out_val" ]; then printf "Validation file %s is missing\n" "$file_out_val" continue; fi printf "Testing against %s\n" "$file_in" # Run application, redirect in file to app, and output to out file "./$bin" &lt; "$file_in" &gt; "$file_out_tst" # Execute diff $diff "$file_out_tst" "$file_out_val" # Check exit code from previous command (ie diff) # We need to add this to a variable else we can't print it # as it will be changed by the if [ # Iff not 0 then the files differ (at least with diff) e_code=$? if [ $e_code != 0 ]; then printf "TEST FAIL : %d\n" "$e_code" else printf "TEST OK!\n" fi # Pause by prompt read -p "Enter a to abort, anything else to continue: " input_data # Iff input is "a" then abort [ "$input_data" == "a" ] &amp;&amp; break done # Clean exit with status 0 exit 0 </code></pre> <hr> <p>Edit.<br /></p> <p>Added exit code check; And a short walk trough:</p> <p>This will in short do:</p> <ol> <li>Check if argument is given (bin/application)</li> <li>Use an array of "base names", loop this and generate real filenames. <ul> <li>I.e.: Having array <code>("file1" "file2")</code> you get<br /> <ul> <li>In file: <code>file1.in</code></li> <li>Out file to validate against: <code>file1.out</code></li> <li>Out file: <code>file1.out.tst</code></li> <li>In file: <code>file2.in</code></li> <li>...</li> </ul></li> </ul></li> <li>Execute application and redirect in file to <code>stdin</code> for application by <code>&lt;</code>, and redirect <code>stdout</code> from application to out file test by <code>&gt;</code>.</li> <li>Use a tool like i.e. <code>diff</code> to test if they are the same.</li> <li>Check exit / return code from tool and print message (FAIL/OK)</li> <li>Prompt for continuance.</li> </ol> <p>Any and all of which off course can be modified, removed etc.</p> <hr> <p>Some links:</p> <ul> <li><a href="http://tldp.org/LDP/abs/html/" rel="nofollow">TLDP; Advanced Bash-Scripting Guide</a> (can be a bit more readable with <a href="http://userstyles.org/styles/browse/all/tldp" rel="nofollow">this</a>) <ul> <li><a href="http://tldp.org/LDP/abs/html/arrays.html" rel="nofollow">Arrays</a></li> <li><a href="http://tldp.org/LDP/abs/html/fto.html" rel="nofollow">File test operators</a></li> <li><a href="http://tldp.org/LDP/abs/html/loops.html" rel="nofollow">Loops and branches</a></li> <li><a href="http://tldp.org/LDP/abs/html/exit-status.html" rel="nofollow">Exit-status</a></li> <li>...</li> </ul></li> <li><a href="http://www.thegeekstuff.com/2010/06/bash-array-tutorial/" rel="nofollow">bash-array-tutorial</a></li> <li><a href="http://tldp.org/LDP/Bash-Beginners-Guide/html/index.html" rel="nofollow">TLDP; Bash-Beginners-Guide</a></li> </ul>
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