added @match header validator & tests

src/utils/validators.ts

@@ -0,0 +1,5 @@
+export const validateMatchHeaders = (matches: string[]) => {
+    const validationRegex =
+        /^((?:https?|file|ftp|\*)(?=:\/\/)|(?:urn(?=:))):(?:\/\/)?(?:((?:\*||.+?)(?=\/|$)))?(\/\*|(?:.+?\*?)+)?|<all_urls>/;
+    return matches.every((match) => validationRegex.test(match));
+};

test/utils.spec.ts

@@ -0,0 +1,30 @@
+import { expect } from "chai";
+import { validateMatchHeaders } from "../src/utils/validators";
+
+describe("validators", () => {
+    describe("@match headers validator", () => {
+        const sampleMatches: string[] = [
+            "http://*/foo*",
+            "https://*.google.com/foo*bar",
+            "http://example.org/foo/bar.html",
+            "file:///foo*",
+            "http://127.0.0.1/*",
+            "*://mail.google.com/*",
+            "urn:*",
+            "<all_urls>",
+        ];
+
+        it("should correctly validate valid headers", () => {
+            const valid = validateMatchHeaders(sampleMatches);
+            expect(valid).to.be.true;
+        });
+
+        it("should correctly validate invalid headers", () => {
+            const valid = validateMatchHeaders([
+                ...sampleMatches,
+                "http//typo.ed/*",
+            ]);
+            expect(valid).to.be.false;
+        });
+    });
+});