fix(comparator):fixing the test

improving error message in the solution
add readme info about error message

sh/tests/comparator_test.sh

@@ -5,19 +5,12 @@ set -euo pipefail
 IFS='
 '
 
-# Test if there were only two arguments given
-
 script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
 
 challenge() {
-    if [ $# -ne 2 ]; then
-        submitted=$(bash "$script_dirS"/student/comparator.sh $1)
-        expected=$(bash "$script_dirS"/solutions/comparator.sh $1)
-    else
-        submitted=$(bash "$script_dirS"/student/comparator.sh $1 $2)
-        expected=$(bash "$script_dirS"/solutions/comparator.sh $1 $2)
-        diff <(echo "$submitted") <(echo "$expected")
-    fi
+    submitted=$(bash $script_dirS/student/comparator.sh "$@")
+    expected=$(bash $script_dirS/solutions/comparator.sh "$@")
+    diff <(echo "$submitted") <(echo "$expected")
 }
 
 for i in $(seq 1 10); do

sh/tests/solutions/comparator.sh

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 
 if [ "$#" -ne 2 ]; then
-    echo "Error: script requires two arguments to run"
+    echo "Error: The script only works with two arguments!"
 elif ! [[ $1 =~ ^-?[0-9]*\.?[0-9]+$ ]] || ! [[ $2 =~ ^-?[0-9]*\.?[0-9]+$ ]]; then
-    echo "Error: Only two numeric arguments are acceptable"
+    echo "Error: Only two numeric arguments are acceptable!"
 elif [ "$1" -gt "$2" ]; then
     echo "$1 > $2"
 elif [ "$1" -lt "$2" ]; then

subjects/devops/comparator/README.md

@@ -3,7 +3,7 @@
 ### Instructions
 
 Create a script `comparator.sh` which will accept only two numbers as arguments and it will verify if the first given argument is bigger, smaller or equal than the second given argument.
-You must print te output like the example in usage.
+You must print the output like the example in usage.
 
 ### Usage
 
@@ -14,6 +14,12 @@ $ ./comparator.sh 29 3
 29 > 3
 $ ./comparator.sh 12 12
 12 = 12
+$ ./comparator.sh  8 9 9
+Error: The script only works with two arguments!
+$ ./comparator.sh  8 s
+Error: Only two numeric arguments are acceptable!
+$ ./comparator.sh  8
+Error: The script only works with two arguments!
 $
 ```