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Full Discussion: If statement help
Top Forums Shell Programming and Scripting If statement help Post 302839529 by kshji on Friday 2nd of August 2013 12:01:30 AM
Old 08-02-2013
if is only command which test command exit code.
Code:
if commandline
then # if commandline exit status is 0
        do_something
else  # if commandline exit status is not 0
        do_some
fi

Often you use if together with test command which you can write using command test or [.
Or
A conditional expression is used with the [[ compound command to test attributes.
-eq is arithmetic comparisons. With strings == and != is better operators.

Add "" round the variable. Why ? If variable is not set, then you get error, but if it is inside "", then you have string which length is always something, sometimes 0. Here is example where use test cond, not [[
Code:
if [ "$ORACLE_SID" = "csdb" ]
then
  export email_recipient="CronMgmtTeam"
elif [ "$ORACLE_SID" = "cstg" ]
then
  export email_recipient="qa"
else
  export email_recipient="me"
fi

Also setting always default value before testing, you need less if-then-else branches.
Code:
email_recipient="me"
export email_recipient
# after that 3 version:
# ver1
if [ "$ORACLE_SID" = "csdb" ]
then
    email_recipient="CronMgmtTeam"
elif [ "$ORACLE_SID" = "cstg" ]
then
  email_recipient="qa"
fi
# ver 2
if [ "$ORACLE_SID" = "csdb" ] ; then
    email_recipient="CronMgmtTeam"
fi
if [ "$ORACLE_SID" = "cstg" ] ; then
    email_recipient="qa"
fi
# ver3
[ "$ORACLE_SID" = "csdb" ]  && email_recipient="CronMgmtTeam"
[ "$ORACLE_SID" = "cstg" ] && email_recipient="qa"

I like to use case in this kind of testing (lot of branches), so nice to read. Case is powerful for pattern testing.
Code:
export email_recipient
case "$ORACLE_SID" in
         csdb) email_recipient="CronMgmtTeam" ;;
         cstg) email_recipient="qa" ;;
         *) email_recipient="me" ;;
esac

 

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SHUNIT2(1)																SHUNIT2(1)

NAME
shunit2 - A unit test framework for shell scripts SYNOPSIS
shunit2 unitfile DESCRIPTION
shUnit2 is a xUnit unit test framework for Bourne based shell scripts, and it is designed to work in a similar manner to JUnit, PyUnit, etc.. If you have ever had the desire to write a unit test for a shell script, shUnit2 can do the job. You can either run shunit2 directly from the commandline and specify the unit file or directly source the shunit2 executable. If you directly execute shunit2 and don't specify a unitfile shunit2 assumes a empty testfile and will return without an error message. EXAMPLE
Simple script to test if 1 equals 1 #! /bin/sh testEquality() { assertEquals 1 1 } # load shunit2 . shunit2 Execute shUnit2 unit tests directly from the commandline shunit2 /path/to/unit/file OPTIONS
shunit2 does not support any commandline options at all. You can either source shunit2 to execute your unit tests or directly run shunit2 as a commandline script. SEE ALSO
For more information see http://code.google.com/p/shunit2/ or have a look at the installed documentation in /usr/share/doc/shunit2/ AUTHOR
shunit2 was written by Kate Ward <kate.ward@forestent.com>. This manpage was written by Ulrich Dangel <mru@spamt.net>. 2.1.6 03/25/2012 SHUNIT2(1)
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