From beb9df4df2c173866c7bdcd3d3ec7d98bd6493bd Mon Sep 17 00:00:00 2001
From: Danijel Martinek <danijel@fraqtal.xyz>
Date: Mon, 13 Jul 2026 00:20:57 +0200
Subject: [PATCH] test(core-trpc): cover the router-agnostic useTRPC delegation
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The router-agnostic refactor turned useTRPC from a destructured const into a
wrapper function; its body was unexercised, dropping client.ts below the 80%
coverage floor. Stub the tRPC context factory and assert useTRPC() delegates
to the shared proxy — client.ts back to 100%.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016j8z4VHjedXDTjEDNg7qHK
---
 packages/core-trpc/src/client.test.ts | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/packages/core-trpc/src/client.test.ts b/packages/core-trpc/src/client.test.ts
index e998a06..9d879d2 100644
--- a/packages/core-trpc/src/client.test.ts
+++ b/packages/core-trpc/src/client.test.ts
@@ -1,4 +1,15 @@
-import { describe, it, expect } from "vitest";
+import { describe, it, expect, vi } from "vitest";
+
+// Stub the tRPC context factory so useTRPC() can run outside a React render:
+// the real context.useTRPC() requires a mounted TRPCProvider. The stubbed
+// proxy lets us exercise the router-agnostic delegation (client.ts:useTRPC).
+vi.mock("@trpc/tanstack-react-query", () => ({
+  createTRPCContext: () => ({
+    TRPCProvider: () => null,
+    useTRPC: () => ({ __proxy: "trpc-options-proxy" }),
+  }),
+}));
+
 import { useTRPC, TRPCProvider } from "./client";
 
 describe("core-trpc client exports", () => {
@@ -9,4 +20,10 @@ describe("core-trpc client exports", () => {
   it("exports TRPCProvider component", () => {
     expect(TRPCProvider).toBeTypeOf("function");
   });
+
+  it("useTRPC delegates to the underlying router-agnostic tRPC proxy", () => {
+    // The generic is a compile-time-only cast; at runtime it returns whatever
+    // the shared context proxy yields.
+    expect(useTRPC()).toEqual({ __proxy: "trpc-options-proxy" });
+  });
 });