refactor(memory): share post-json helper across remote fetchers

src/memory/post-json.test.ts

@@ -0,0 +1,53 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+import { postJson } from "./post-json.js";
+import { withRemoteHttpResponse } from "./remote-http.js";
+
+vi.mock("./remote-http.js", () => ({
+  withRemoteHttpResponse: vi.fn(),
+}));
+
+describe("postJson", () => {
+  const remoteHttpMock = vi.mocked(withRemoteHttpResponse);
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it("parses JSON payload on successful response", async () => {
+    remoteHttpMock.mockImplementationOnce(async (params) => {
+      return await params.onResponse(
+        new Response(JSON.stringify({ data: [{ embedding: [1, 2] }] }), { status: 200 }),
+      );
+    });
+
+    const result = await postJson({
+      url: "https://memory.example/v1/post",
+      headers: { Authorization: "Bearer test" },
+      body: { input: ["x"] },
+      errorPrefix: "post failed",
+      parse: (payload) => payload,
+    });
+
+    expect(result).toEqual({ data: [{ embedding: [1, 2] }] });
+  });
+
+  it("attaches status to thrown error when requested", async () => {
+    remoteHttpMock.mockImplementationOnce(async (params) => {
+      return await params.onResponse(new Response("bad gateway", { status: 502 }));
+    });
+
+    await expect(
+      postJson({
+        url: "https://memory.example/v1/post",
+        headers: {},
+        body: {},
+        errorPrefix: "post failed",
+        attachStatus: true,
+        parse: () => ({}),
+      }),
+    ).rejects.toMatchObject({
+      message: expect.stringContaining("post failed: 502 bad gateway"),
+      status: 502,
+    });
+  });
+});