Add cross-browser popup status handling

tests/site-definitions.test.ts

@@ -0,0 +1,30 @@
+import { describe, expect, it } from "vitest";
+import { BUILTIN_DEFINITIONS, effectiveDefinitions } from "../src/content/definitions";
+import { validateDefinitionConfiguration } from "../src/shared/site-definitions";
+
+const customDefinition = {
+  id: "example-social",
+  name: "Example Social",
+  urlPatterns: ["https://*.example.test/*"],
+  requiredSelectors: [".feed"],
+  post: { rootSelectors: ["article"], textSelectors: [".content"], idAttributes: ["data-id"] }
+};
+
+describe("site definitions", () => {
+  it("accepts declarative custom definitions and deduplicates disabled IDs", () => {
+    const result = validateDefinitionConfiguration({ customDefinitions: [customDefinition], disabledDefinitionIds: ["mastodon", "mastodon"] });
+    expect(result.valid).toBe(true);
+    if (result.valid) expect(result.value.disabledDefinitionIds).toEqual(["mastodon"]);
+  });
+
+  it("rejects executable or malformed definition fields", () => {
+    const result = validateDefinitionConfiguration({ customDefinitions: [{ ...customDefinition, id: "Bad ID", post: { ...customDefinition.post, rootSelectors: ["["] } }], disabledDefinitionIds: [] });
+    expect(result.valid).toBe(false);
+  });
+
+  it("lets a custom definition replace a bundled definition by ID", () => {
+    const override = { ...BUILTIN_DEFINITIONS[0]!, name: "Custom Mastodon" };
+    const definitions = effectiveDefinitions([override], []);
+    expect(definitions.filter((definition) => definition.id === "mastodon")).toEqual([override]);
+  });
+});