feat: improve resource reconciliation and observability

tests/lib/request-log.test.ts

@@ -0,0 +1,65 @@
+import { describe, expect, test } from "bun:test";
+import { logServerRequest } from "../../lib/request-log";
+
+describe("server response logging", () => {
+  test("does not consume streaming response bodies", async () => {
+    let pulls = 0;
+    const body = new ReadableStream<Uint8Array>({
+      pull(controller) {
+        pulls += 1;
+        controller.enqueue(new TextEncoder().encode('{"message":"live"}\n'));
+      },
+    });
+    const logs: Record<string, unknown>[] = [];
+    const response = new Response(body, {
+      headers: { "content-type": "application/x-ndjson; charset=utf-8" },
+    });
+    await Bun.sleep(0);
+    const pullsBeforeLogging = pulls;
+    const loggedResponse = await logServerRequest(
+      new Request("https://kuber.astrxl.dev/logs"),
+      "streaming-response",
+      () => response,
+      { log: (entry) => logs.push(entry) },
+    );
+
+    expect(pulls).toBe(pullsBeforeLogging);
+    expect(logs).toContainEqual(
+      expect.objectContaining({
+        event: "kuber.server.response.body",
+        bodySkipped: true,
+        streaming: true,
+      }),
+    );
+
+    const reader = loggedResponse.body!.getReader();
+    expect(new TextDecoder().decode((await reader.read()).value)).toBe(
+      '{"message":"live"}\n',
+    );
+    await reader.cancel();
+  });
+
+  test("logs bounded non-streaming response bodies", async () => {
+    const logs: Record<string, unknown>[] = [];
+    await logServerRequest(
+      new Request("https://kuber.astrxl.dev/health"),
+      "bounded-response",
+      () =>
+        new Response("healthy", {
+          headers: {
+            "content-length": "7",
+            "content-type": "text/plain; charset=utf-8",
+          },
+        }),
+      { log: (entry) => logs.push(entry) },
+    );
+
+    await Bun.sleep(0);
+    expect(logs).toContainEqual(
+      expect.objectContaining({
+        event: "kuber.server.response.body",
+        body: { encoding: "base64", data: "aGVhbHRoeQ==" },
+      }),
+    );
+  });
+});