feat(array-selector): add test

sh/tests/array-selector_test.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash 
+
+
+# Unofficial Bash Strict Mode
+set -euo pipefail
+IFS='
+'
+
+script_dirS=$(cd -P "$(dirname "$BASH_SOURCE")" &>/dev/null && pwd)
+
+challenge() {
+    submitted=$(bash "$script_dirS"/student/array-selector.sh $1)
+    expected=$(bash "$script_dirS"/solutions/array-selector.sh $1)
+
+    diff <(echo "$submitted") <(echo "$expected")
+}
+
+# Test with numbers - out of range included
+for num in {0..6}
+do 
+    challenge $num
+done
+
+# Test with a value that is not a digit 
+
+challenge "abc"
+
+# Test with wrong number of arguments
+
+submitted=$(bash "$script_dirS"/student/array-selector.sh)
+submitted=$(bash "$script_dirS"/solutions/array-selector.sh)
+
+diff <(echo "$submitted") <(echo "$expected")