From 693ed332b58d05192f55b8192d2c0c4bc4f4824a Mon Sep 17 00:00:00 2001
From: morluto <76467478+morluto@users.noreply.github.com>
Date: Sun, 11 Oct 2026 13:20:15 +0800
Subject: [PATCH] perf(tests): remove timed output and synchronize browser
 fixtures

---
 src/process/capture/TerminalRenderer.test.ts  | 27 +++++++++++++++++++
 .../cdpBrowserProvider.sensitive_data.test.ts |  1 +
 .../process/processTruncationAdapters.test.ts | 23 +++++++---------
 3 files changed, 38 insertions(+), 13 deletions(-)

diff --git a/src/process/capture/TerminalRenderer.test.ts b/src/process/capture/TerminalRenderer.test.ts
index 39d630d3a..b5c99157a 100644
--- a/src/process/capture/TerminalRenderer.test.ts
+++ b/src/process/capture/TerminalRenderer.test.ts
@@ -50,6 +50,33 @@ it("omits trailing blank cells from visible lines without losing rows", async ()
   );
 });
 
+it("applies rendered retention cumulatively across sparse frames", async () => {
+  const renderer = new TerminalRenderer({
+    columns: 10,
+    rows: 1,
+    scrollback: 0,
+    maxBytes: 5,
+    normalize: (value) => value,
+  });
+  try {
+    renderer.write("a", 0);
+    renderer.write("b", 1);
+    const frames = await renderer.frames();
+
+    expect(frames.map(({ lines }) => lines)).toEqual([["a"]]);
+    expect(renderer.retention()).toEqual({
+      budget_bytes: 5,
+      observed_bytes: 6,
+      retained_bytes: 2,
+      observed_frames: 2,
+      retained_frames: 1,
+    });
+    expect(renderer.truncated()).toBe(true);
+  } finally {
+    await renderer.dispose();
+  }
+});
+
 it("trims only after normalization sees the full-width row", async () => {
   const { frames } = await renderFrames("pid 4242", (value) =>
     value.replace(/4242 +$/u, "<pid>"),
diff --git a/tests/boundary/browser/cdpBrowserProvider.sensitive_data.test.ts b/tests/boundary/browser/cdpBrowserProvider.sensitive_data.test.ts
index 2a9662577..fa67368c9 100644
--- a/tests/boundary/browser/cdpBrowserProvider.sensitive_data.test.ts
+++ b/tests/boundary/browser/cdpBrowserProvider.sensitive_data.test.ts
@@ -224,6 +224,7 @@ describe("CdpBrowserProvider: explicitly requested text and payload shapes", ()
     const browser = await startFakeCdpBrowser({
       sensitiveShapes: true,
       binaryWebSocketEvent: true,
+      eventsBeforeReply: ["Network.enable"],
     });
     trackBrowser(browser);
     const result = await new CdpBrowserProvider().inspectPage(
diff --git a/tests/boundary/process/processTruncationAdapters.test.ts b/tests/boundary/process/processTruncationAdapters.test.ts
index a346a377e..0a9cf7d9f 100644
--- a/tests/boundary/process/processTruncationAdapters.test.ts
+++ b/tests/boundary/process/processTruncationAdapters.test.ts
@@ -63,30 +63,29 @@ const capture = async (
 };
 
 itWithCaptureCapability.each(["cli", "mcp"] as const)(
-  "localizes sparse rendered-state exhaustion through %s",
+  "localizes rendered-state expansion exhaustion through %s",
   async (adapter) => {
     const root = await createTestTempDirectory("rea-rendered-budget-");
+    // CSI REP expands a small raw burst into a full screen, so rendered
+    // exhaustion does not depend on how the PTY batches output chunks.
+    const output = "x\u001b[79b".repeat(24);
     const result = await capture(adapter, {
       executable: process.execPath,
       working_directory: root,
-      arguments: [
-        "-e",
-        "let n=0;const timer=setInterval(()=>{console.log('board '+String(n).padStart(2,'0')+' completed; score '+String(n*10));if(++n===65)clearInterval(timer)},20)",
-      ],
+      arguments: ["-e", `process.stdout.write(${JSON.stringify(output)})`],
+      terminal: { columns: 80, rows: 24, scrollback: 0 },
       normalization: {
         ports: false,
         pids: false,
         paths: false,
         time_bucket_ms: 1,
       },
-      limits: { output_bytes: 30_000 },
+      limits: { output_bytes: 1_000 },
     });
     const details = result.truncation_details;
     if (details === undefined) throw new Error("Expected producer coverage");
-    expect(result.frames.map(({ data }) => data).join("")).toContain(
-      "board 64 completed; score 640",
-    );
-    expect(details.raw_terminal.observed_bytes).toBe(2004);
+    expect(result.frames.map(({ data }) => data).join("")).toBe(output);
+    expect(details.raw_terminal.observed_bytes).toBe(Buffer.byteLength(output));
     expect(details.raw_terminal.retained_bytes).toBe(
       details.raw_terminal.observed_bytes,
     );
@@ -94,9 +93,7 @@ itWithCaptureCapability.each(["cli", "mcp"] as const)(
     expect(details.rendered_terminal.observed_frames).toBeGreaterThan(
       result.rendered_frames.length,
     );
-    expect(details.rendered_terminal.retained_bytes).toBeLessThanOrEqual(
-      30_000,
-    );
+    expect(details.rendered_terminal.retained_bytes).toBeLessThanOrEqual(1_000);
     expect(details.process.coverage).toBe("sampled");
     expect(processSourceTruncated(result, "terminal_raw")).toBe(false);
     expect(processSourceTruncated(result, "terminal_rendered")).toBe(true);