test(core): parameterise findGroupFolder cases with it.each

Addresses Greptile review feedback on #3222 — the four cases share
fixtures and shape, matching the repo's it.each convention.

Generated-By: PostHog Code
Task-Id: 783b5974-b3ee-4b5e-9ff6-fbc93a6794c5

Author: webjunkie

packages/core/src/sidebar/groupTasks.test.ts

@@ -354,40 +354,60 @@ describe("groupByRepository", () => {
 });
 
 describe("findGroupFolder", () => {
-  const mainClone = {
+  interface GroupFolder {
+    path: string;
+    remoteUrl: string | null;
+    mainRepoPath?: string | null;
+  }
+
+  const mainClone: GroupFolder = {
     path: "/repos/code",
     remoteUrl: "posthog/code",
     mainRepoPath: null,
   };
-  const worktree = {
+  const worktree: GroupFolder = {
     path: "/repos/code-wt",
     remoteUrl: "posthog/code",
     mainRepoPath: "/repos/code",
   };
-  const unrelated = {
+  const unrelated: GroupFolder = {
     path: "/repos/other",
     remoteUrl: "acme/other",
     mainRepoPath: null,
   };
-
-  it("prefers the main clone when a worktree of the same repo was added first", () => {
-    expect(
-      findGroupFolder([worktree, mainClone, unrelated], "posthog/code"),
-    ).toBe(mainClone);
-  });
-
-  it("falls back to the worktree when only it is registered", () => {
-    expect(findGroupFolder([worktree, unrelated], "posthog/code")).toBe(
-      worktree,
-    );
-  });
-
-  it("matches folders without a remote by path", () => {
-    const local = { path: "/repos/local", remoteUrl: null };
-    expect(findGroupFolder([local], "/repos/local")).toBe(local);
-  });
-
-  it("returns undefined when nothing matches", () => {
-    expect(findGroupFolder([unrelated], "posthog/code")).toBeUndefined();
+  const local: GroupFolder = { path: "/repos/local", remoteUrl: null };
+
+  it.each<{
+    name: string;
+    folders: GroupFolder[];
+    groupId: string;
+    expected: GroupFolder | undefined;
+  }>([
+    {
+      name: "prefers the main clone when a worktree of the same repo was added first",
+      folders: [worktree, mainClone, unrelated],
+      groupId: "posthog/code",
+      expected: mainClone,
+    },
+    {
+      name: "falls back to the worktree when only it is registered",
+      folders: [worktree, unrelated],
+      groupId: "posthog/code",
+      expected: worktree,
+    },
+    {
+      name: "matches folders without a remote by path",
+      folders: [local],
+      groupId: "/repos/local",
+      expected: local,
+    },
+    {
+      name: "returns undefined when nothing matches",
+      folders: [unrelated],
+      groupId: "posthog/code",
+      expected: undefined,
+    },
+  ])("$name", ({ folders, groupId, expected }) => {
+    expect(findGroupFolder(folders, groupId)).toBe(expected);
   });
 });