refactor(test): share discord send rest harness

src/discord/send.test-harness.ts

@@ -0,0 +1,41 @@
+import { vi } from "vitest";
+
+export function discordWebMediaMockFactory() {
+  return {
+    loadWebMedia: vi.fn().mockResolvedValue({
+      buffer: Buffer.from("img"),
+      fileName: "photo.jpg",
+      contentType: "image/jpeg",
+      kind: "image",
+    }),
+    loadWebMediaRaw: vi.fn().mockResolvedValue({
+      buffer: Buffer.from("img"),
+      fileName: "asset.png",
+      contentType: "image/png",
+      kind: "image",
+    }),
+  };
+}
+
+export function makeDiscordRest() {
+  const postMock = vi.fn();
+  const putMock = vi.fn();
+  const getMock = vi.fn();
+  const patchMock = vi.fn();
+  const deleteMock = vi.fn();
+
+  return {
+    rest: {
+      post: postMock,
+      put: putMock,
+      get: getMock,
+      patch: patchMock,
+      delete: deleteMock,
+    } as unknown as import("@buape/carbon").RequestClient,
+    postMock,
+    putMock,
+    getMock,
+    patchMock,
+    deleteMock,
+  };
+}