#! ./tesh
# This file describes the usage of the Tesh variables and contains all the tests connected.

# Description of this tesh suite
D Usage of tesh variables

# Declare and define the variable include-file
! include-file=catch-signal.tesh

# include the tesh file specified by the value (catch-signal.tesh) of the variable include-file
! include $include-file

# set a new value to the variable include-file
! include-file=basic.tesh

# this line throws a warning (you assign the same value to the variable)
! include-file=basic.tesh

# include the tesh file specified by the value (basic.tesh) of the variable include-file
! include $include-file

# Undefined variable
! expect return $ESYNTAX
< ! include-file=
< ! include $include-file
$ tesh --log="log.thresh:info tesh.fmt:%m%n"
> Test unit from stdin
> [stdin:1] Undefined variable `(include-file)'
> Test unit `stdin': NOK (<stdin:1> syntax error)


# A single sample of the usage of the tesh variables
$ rm -rf temp_testdir
$ mkdir temp_testdir

$ cd temp_testdir

< #include <stdlib.h>
< #include <stdio.h>
< int main(int argc, char* argv[]) {	
<	return ( atoi(argv[1]) + atoi(argv[2]));
<	}  
$ cat > sum.c

$ gcc -o sum sum.c

! x=2
! y=2
! sum=./sum
! rv=4

! expect return $rv
$ $sum $x $y

$ cd ..
$ rm -rf temp_testdir

# set metacommand usage

# This ligne add a new tesh variable DIR

! set DIR=temp_testdir

$ rm -rf $DIR

$ mkdir $DIR

$ cd $DIR

$ cd ..

$ rm -rf $DIR

# This ligne change the value of the tesh variable DIR
! set DIR=test_tempdir

# This ligne # this line throws a warning (you assign the same value to the variable)
! set DIR=test_tempdir


# This ligne create a new variable CURRENT_DIR (setted with the content of the variable DIR)
! CURRENT_DIR=$DIR
p CURRENT_DIR is $CURRENT_DIR (same value as DIR)

# This ligne use the metacommand `set' to update the content of the variable CURRENT_DIR
! set CURRENT_DIR=temp_testdir
p Now CURRENT_DIR is $CURRENT_DIR

# This ligne unset the variable CURRENT_DIR (delete the tesh variable)
! unset CURRENT_DIR
p $CURRENT_DIR does not exist

# This ligne displays the content of the environment variable TESH_PPID (which contains the PID of the tesh parent) 
p The Tesh parent PID is: $TESH_PPID

# This ligne displays the content of the value of the system variable ENOENT
p On this platform ENOENT is: $ENOENT

# Attempt to change the content of a system variable is a syntax error
! expect return $ESYNTAX
< ! ENOENT=300
< $ echo $ENOENT
$ tesh --log="log.thresh:info tesh.fmt:%m%n"
> Test unit from stdin
> [stdin:1] A system variable named `(ENOENT)' already exists
> Test unit `stdin': NOK (<stdin:1> syntax error)

# Substitution usage

! new=1

p new is `$new ' or `${new}'

p the len of new is : ${#new}

! unset new

p new is empty <$new> and is len is <${#new}>

# display 66 and assign 66 to the value 66 of the variable new

p ${new:=66}

p new is `$new ' or `${new}'

p the len of new is : ${#new}

# display 66 and do not assign the value 69 to the variable

p ${new:=69}

p new is `$new ' or `${new}'

p the len of new is : ${#new}

! unset new

# display 79 and do not assigne the value 79 to the variable
# new is empty
p ${new:-79}

p new is `$new ' or `${new}'

p the len of new is : ${#new}

# display nothing and do not assigne the value 89 to the variable
# new is empty
p is empty ${new:+89}

p new is `$new ' or `${new}'

p the len of new is : ${#new}

! set new=999

# display 99 and do not assigne the value 99 to the variable (do not dispaly the value of new)
# new is empty
p is empty ${new:+99}

p new is `$new ' or `${new}'

p the len of new is : ${#new}

! unset new

# p ${new:?new is empty}