diff --git a/test-regex/file.txt b/test-regex/file.txt
new file mode 100644
index 0000000..4216823
--- /dev/null
+++ b/test-regex/file.txt
@@ -0,0 +1,3 @@
+before line
+somethins# renovate: datasource=docker depName=DepName:latest@sha256:f41be3dcaa8fbe256e8d084c2d938001311db05c26eb84936451f4a82e2af615
+after line
\ No newline at end of file
diff --git a/test-regex/run.mjs b/test-regex/run.mjs
new file mode 100644
index 0000000..75d0f6e
--- /dev/null
+++ b/test-regex/run.mjs
@@ -0,0 +1,20 @@
+import * as path from "node:path";
+import { fileURLToPath } from "node:url";
+import fs from "node:fs";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+
+function extractMatchResult(regex, text) {
+  const pattern = new RegExp(regex);
+  const match = text.match(pattern);
+  console.log("match", match);
+  return match;
+}
+
+const filecontent = fs.readFileSync(path.join(__dirname, "file.txt"), "utf8");
+
+(() => {
+  const regex = "# renovate: datasource=(?<datasource>\\S+) depName=(?<depName>\\S+):(?<currentValue>\\S+)@(?<currentDigest>\\S+)";
+  extractMatchResult(regex, filecontent);
+})();