fix(agents): add arrayBuffer to mock Responses for MiniMax VLM bounded reader

cxbAsDev · cxbAsDev · commit 1864802a0445 · 2026-07-01T08:45:12.000+08:00
diff --git a/src/agents/tools/image-tool.test.ts b/src/agents/tools/image-tool.test.ts
@@ -472,31 +472,32 @@ function registerImageToolEnvReset(priorFetch: typeof global.fetch, keys: string
 }
 
 function stubMinimaxOkFetch() {
+  const body = JSON.stringify({
+    content: "ok",
+    base_resp: { status_code: 0, status_msg: "" },
+  });
   const fetch = vi.fn().mockResolvedValue({
     ok: true,
     status: 200,
     statusText: "OK",
     headers: new Headers(),
-    json: async () => ({
-      content: "ok",
-      base_resp: { status_code: 0, status_msg: "" },
-    }),
+    json: async () => JSON.parse(body),
+    arrayBuffer: async () => new TextEncoder().encode(body).buffer,
   });
   global.fetch = withFetchPreconnect(fetch);
   vi.stubEnv("MINIMAX_API_KEY", "minimax-test");
   return fetch;
 }
 
 function stubMinimaxFetch(baseResp: { status_code: number; status_msg: string }, content = "ok") {
+  const body = JSON.stringify({ content, base_resp: baseResp });
   const fetch = vi.fn().mockResolvedValue({
     ok: true,
     status: 200,
     statusText: "OK",
     headers: new Headers(),
-    json: async () => ({
-      content,
-      base_resp: baseResp,
-    }),
+    json: async () => JSON.parse(body),
+    arrayBuffer: async () => new TextEncoder().encode(body).buffer,
   });
   global.fetch = withFetchPreconnect(fetch);
   return fetch;
diff --git a/src/media-understanding/image.test.ts b/src/media-understanding/image.test.ts
@@ -154,6 +154,12 @@ describe("describeImageWithModel", () => {
         base_resp: { status_code: 0 },
         content: "portal ok",
       })),
+      arrayBuffer: vi.fn(
+        async () =>
+          new TextEncoder().encode(
+            JSON.stringify({ base_resp: { status_code: 0 }, content: "portal ok" }),
+          ).buffer,
+      ),
       text: vi.fn(async () => ""),
     });
     discoverModelsMock.mockReturnValue({
