Separating test function into its own file

src/panels/TcpDumpPanel.ts

@@ -28,7 +28,7 @@ const captureFileBasePathEscaped = escapeRegExp(captureFileBasePath);
 const captureFilePathRegex = `${captureFileBasePathEscaped}(.*)\\.cap`; // Matches the part of the filename after the prefix
 
 // Escape all regex meta characters to ensure sanitation and '/' for later use in regex pattern
-function escapeRegExp(input: string): string {
+export function escapeRegExp(input: string): string {
     return input.replace(/[.*+?^${}()|[\]\\/]/g, "\\$&"); //Escapes by adding '\' to every matched string $&
 }
 //Reference for regex syntax chars: https://262.ecma-international.org/13.0/index.html#prod-SyntaxCharacter
@@ -60,20 +60,6 @@ function getCaptureFromFilePath(filePath: string): string | null {
     return fileMatch && fileMatch[1];
 }
 
-// Test function to verify escaping
-function testEscapeRegExp() {
-    const testString = "/tmp/vscodenodecap_*+?^${}()|[]\\";
-    const expectedEscapedString = "\\/tmp\\/vscodenodecap_\\*\\+\\?\\^\\$\\{\\}\\(\\)\\|\\[\\]\\\\";
-
-    const actualEscapedString = escapeRegExp(testString);
-    console.assert(
-        actualEscapedString === expectedEscapedString,
-        `Expected ${expectedEscapedString}, but got ${actualEscapedString}`,
-    );
-}
-
-testEscapeRegExp();
-
 export class TcpDumpPanel extends BasePanel<"tcpDump"> {
     constructor(extensionUri: Uri) {
         super(extensionUri, "tcpDump", {

src/tests/suite/TcpDumpPanel.test.ts

@@ -0,0 +1,28 @@
+import * as assert from "assert";
+import { escapeRegExp } from "../../panels/TcpDumpPanel";
+
+describe("testEscapeRegExp", function () {
+    it("should escape special regex characters", function () {
+        const input = "a.b*c?d+e^f$g|h(i)j{k}l[m]n\\o";
+        const expected = "a\\.b\\*c\\?d\\+e\\^f\\$g\\|h\\(i\\)j\\{k\\}l\\[m\\]n\\\\o";
+        assert.equal(escapeRegExp(input), expected);
+    });
+
+    it("should return the same string if no special characters", function () {
+        const input = "abcdefg";
+        const expected = "abcdefg";
+        assert.equal(escapeRegExp(input), expected);
+    });
+
+    it("should return an empty string if input is empty", function () {
+        const input = "";
+        const expected = "";
+        assert.equal(escapeRegExp(input), expected);
+    });
+
+    it("should not double escape already escaped characters", function () {
+        //const input = "a\\.b\\*c\\?d\\+e\\^f\\$g\\|h\\(i\\)j\\{k\\}l\\[m\\]n\\\\o";
+        const expected = "a\\.b\\*c\\?d\\+e\\^f\\$g\\|h\\(i\\)j\\{k\\}l\\[m\\]n\\\\o";
+        assert.equal("", expected);
+    });
+});