diff --git a/tests/functional/run-tests.sh b/tests/functional/run-tests.sh
new file mode 100755
index 0000000..ef5030f
--- /dev/null
+++ b/tests/functional/run-tests.sh
@@ -0,0 +1,268 @@
+#!/bin/bash
+
+
+###################
+#    Variables    #
+###################
+
+executable="../../src/42sh"
+ref_executable="dash"
+
+tmp_script="/tmp/test_script.sh"
+output="/tmp/42sh_tests.output"
+ref_output="/tmp/42sh_tests_ref.output"
+
+total_tests=0
+errors_count=0
+timeouts_count=0
+
+ 
+##################
+#     Colors     #
+##################
+
+# Reset
+Color_Off='\033[0m'       # Text Reset
+
+# Regular Colors
+Black='\033[0;30m'        # Black
+Red='\033[0;31m'          # Red
+Green='\033[0;32m'        # Green
+Yellow='\033[0;33m'       # Yellow
+Blue='\033[0;34m'         # Blue
+Purple='\033[0;35m'       # Purple
+Cyan='\033[0;36m'         # Cyan
+White='\033[0;37m'        # White
+
+# Bold
+BBlack='\033[1;30m'       # Black
+BRed='\033[1;31m'         # Red
+BGreen='\033[1;32m'       # Green
+BYellow='\033[1;33m'      # Yellow
+BBlue='\033[1;34m'        # Blue
+BPurple='\033[1;35m'      # Purple
+BCyan='\033[1;36m'        # Cyan
+BWhite='\033[1;37m'       # White
+
+# Underline
+UBlack='\033[4;30m'       # Black
+URed='\033[4;31m'         # Red
+UGreen='\033[4;32m'       # Green
+UYellow='\033[4;33m'      # Yellow
+UBlue='\033[4;34m'        # Blue
+UPurple='\033[4;35m'      # Purple
+UCyan='\033[4;36m'        # Cyan
+UWhite='\033[4;37m'       # White
+
+# Background
+On_Black='\033[40m'       # Black
+On_Red='\033[41m'         # Red
+On_Green='\033[42m'       # Green
+On_Yellow='\033[43m'      # Yellow
+On_Blue='\033[44m'        # Blue
+On_Purple='\033[45m'      # Purple
+On_Cyan='\033[46m'        # Cyan
+On_White='\033[47m'       # White
+
+# High Intensity
+IBlack='\033[0;90m'       # Black
+IRed='\033[0;91m'         # Red
+IGreen='\033[0;92m'       # Green
+IYellow='\033[0;93m'      # Yellow
+IBlue='\033[0;94m'        # Blue
+IPurple='\033[0;95m'      # Purple
+ICyan='\033[0;96m'        # Cyan
+IWhite='\033[0;97m'       # White
+
+# Bold High Intensity
+BIBlack='\033[1;90m'      # Black
+BIRed='\033[1;91m'        # Red
+BIGreen='\033[1;92m'      # Green
+BIYellow='\033[1;93m'     # Yellow
+BIBlue='\033[1;94m'       # Blue
+BIPurple='\033[1;95m'     # Purple
+BICyan='\033[1;96m'       # Cyan
+BIWhite='\033[1;97m'      # White
+
+# High Intensity backgrounds
+On_IBlack='\033[0;100m'   # Black
+On_IRed='\033[0;101m'     # Red
+On_IGreen='\033[0;102m'   # Green
+On_IYellow='\033[0;103m'  # Yellow
+On_IBlue='\033[0;104m'    # Blue
+On_IPurple='\033[0;105m'  # Purple
+On_ICyan='\033[0;106m'    # Cyan
+On_IWhite='\033[0;107m'   # White
+
+
+
+##################
+#    Wrappers    #
+##################
+
+
+# @arg test command
+# @arg actual code
+# @arg ref code
+check_result() {
+
+    command="$1"
+    actual_code="$2"
+    ref_code="$3"
+    
+    test_failed=0
+
+    # Check return code
+    if [[ "$actual_code" -eq 124 ]]; then
+        echo -e $BRed "TIMEOUT" $Color_Off
+        echo -e '    ' "on '$command'"
+        echo -e '    ' "Expected code $ref_code but got $actual_code"
+        ((timeouts_count++))
+        test_failed=1
+    elif [[ "$actual_code" -ne "$ref_code" ]]; then
+        echo -e $BRed "FAILED" $Color_Off
+        echo -e '    ' "on '$command'"
+        echo -e '    ' "Expected code $ref_code but got $actual_code"
+        test_failed=1
+    # Check output
+    elif diff $output $ref_output > /dev/null; then
+        echo -e $BRed "FAILED" $Color_Off
+        echo -e '    ' "on '$command'"
+        echo -e '    ' "Output is not the one expected" 
+        test_failed=1
+    else
+        echo -e $BGreen OK $Color_Off
+    fi
+
+    if [[ "$test_failed" -eq 1 ]]; then
+        ((errors_count++))
+    fi
+
+}
+
+
+# @arg test name
+# @arg input string
+test_str() {
+
+    # Check input
+    if [[ -z "$1" || -z "$2" ]]; then
+        echo -e $BRed "\n\n" "Issue in the testsuite: test_str: One or more argument is empty" $Color_Off
+        exit 2
+    fi
+  
+    echo -e $BBlue "================== $1 ==================" $Color_Off
+
+    echo -e "$2" > $tmp_script
+
+    # Arg
+    echo -e -n $Blue "= [ARG]   " $Color_Off
+    timeout 2 $executable -c "$2" &> $output
+    actual_code=$?
+    $ref_executable -c "$2" &> $ref_output
+    ref_code=$?
+    ((total_tests++))
+    check_result "$2" "$actual_code" "$ref_code"
+
+    # Script
+    echo -e -n $Blue "= [SCRIPT]" $Color_Off
+    timeout 2 $executable "$tmp_script" &> $output
+    actual_code=$?
+    $ref_executable "$tmp_script" &> $ref_output
+    ref_code=$?
+    ((total_tests++))
+    check_result "$2" "$actual_code" "$ref_code"
+
+    # Stdin
+    echo -e -n $Blue "= [STDIN] " $Color_Off
+    timeout 2 $executable < "$tmp_script" &> $output
+    actual_code=$?
+    $ref_executable < "$tmp_script" &> $ref_output
+    ref_code=$?
+    ((total_tests++))
+    check_result "$2" "$actual_code" "$ref_code"
+
+    echo -e "\n"
+    # echo -e $BBlue "===========================================" $Color_Off "\n"
+}
+
+# @arg test name
+# @arg input script
+test_script() {
+
+    # Check input
+    if [[ -z "$1" || -z "$2" ]]; then
+        echo -e $BRed "\n\n" "Issue in the testsuite: test_script: One or more argument is empty" $Color_Off
+        exit 2
+    fi
+    if [[ ! -f "$2" ]]; then
+        echo -e $BRed "\n\n" "Issue in the testsuite: test_script: Second argument is not a file" $Color_Off
+        exit 2
+    fi
+
+    echo -e $BBlue "================== $1 ==================" $Color_Off
+    
+    # Script
+    echo -e -n "= [SCRIPT] "
+    timeout 2 $executable "$tmp_script" &> $output
+    actual_code=$?
+    $ref_executable "$tmp_script" &> $ref_output
+    ref_code=$?
+    ((total_tests++))
+    check_result "$2" "$actual_code" "$ref_code"
+
+    # Stdin
+    echo -e -n "= [STDIN] "
+    timeout 2 $executable < "$tmp_script" &> $output
+    actual_code=$?
+    $ref_executable < "$2" &> $ref_output
+    ref_code=$?
+    ((total_tests++))
+    check_result "$tmp_script" "$actual_code" "$ref_code"
+
+    echo -e "\n"
+    # echo -e $BBlue "===========================================" $Color_Off "\n"
+}
+
+summarize() {
+
+    (( passed_tests = $total_tests - $errors_count ))
+    (( tests_percentage = 100 * $passed_tests / $total_tests ))
+
+    if [[ tests_percentage -gt 80 ]]; then
+        coverage_color=$BGreen
+    elif [[ tests_percentage -gt 50 ]]; then
+        coverage_color=$BYellow
+    elif [[ tests_percentage -gt 30 ]]; then
+        coverage_color=$BOrange
+    else
+        coverage_color=$BRed
+    fi
+
+    echo -e $BWhite "\n\n""===========" $UWhite"Summary"$Color_Off "\n"
+    echo -e " Passed $coverage_color$passed_tests/$total_tests$Color_Off tests ($coverage_color$tests_percentage$Color_Off%)"
+    echo -e " Got $BRed$timeouts_count timeout(s)$Color_Off"
+    echo
+
+}
+
+# ***********************************************************
+#################
+#     Tests     #
+#################
+
+echo -e "\n\n""===$BGreen TestsuitatorX Ultra Pro Max+ 365 Premium Gris Sidéral" "\n\n"$Color_Off
+
+
+# echo
+test_str "Hello" "echo Hello there"
+test_str "Hello;" "echo Hello there;"
+test_str "'Hello'" "echo 'Hello there'"
+test_str "Hello;Hello" "echo Hello; echo Wesh attends quoi; echo pouquoi je suis une ligne en dessous"
+
+# programs
+test_str "LS" "ls"
+test_str "Le SS" "lss"
+
+
+summarize