Added a test suite.

run-tests.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+
+# This script runs all the test required to verify the functionality of the simple CA implementation.
+set -e
+
+# Load the certificate functions
+source "$(dirname "$BASH_SOURCE[0]")/cert-functions.sh"
+
+# Create a temporary directory for the test certificates
+TEMP_CERT_DIR=$(mktemp -d)
+# Ensure the temporary directory is cleaned up on exit or interruption
+trap "rm -rf $TEMP_CERT_DIR" EXIT KILL HUP INT QUIT
+
+# Create a standalone CA for testing purposes
+if ! make_ca "$TEMP_CERT_DIR" "Test CA"; then
+    echo "ERROR: Failed to create CA." >&2
+    exit 1
+fi