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apps/miniprogram/pages/terminal/terminalPerfLogBuffer.test.ts

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+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+
+const { createTerminalPerfLogBuffer, pickPerfScore } = require("./terminalPerfLogBuffer.js");
+
+describe("terminalPerfLogBuffer", () => {
+  beforeEach(() => {
+    vi.useFakeTimers();
+  });
+
+  afterEach(() => {
+    vi.useRealTimers();
+  });
+
+  it("会从常见耗时字段中选出最大的 score", () => {
+    expect(
+      pickPerfScore({
+        totalCostMs: 120,
+        setDataCostMs: 320,
+        overlayCostMs: 180
+      })
+    ).toBe(320);
+    expect(
+      pickPerfScore({
+        applyCostMs: 220,
+        trimCostMs: 380,
+        cloneCostMs: 260
+      })
+    ).toBe(380);
+  });
+
+  it("会把 5 秒窗口内的高频事件聚合成 1 条摘要", () => {
+    const writes = [];
+    const buffer = createTerminalPerfLogBuffer({
+      windowMs: 5000,
+      write(summary) {
+        writes.push(summary);
+      }
+    });
+
+    buffer.push({
+      event: "stdout.slice",
+      at: 1000,
+      sinceLoadMs: 100,
+      status: "connected",
+      totalCostMs: 240
+    });
+    buffer.push({
+      event: "layout.refresh.long",
+      at: 1800,
+      sinceLoadMs: 900,
+      status: "connected",
+      totalCostMs: 1400,
+      setDataCostMs: 1200
+    });
+    buffer.push({
+      event: "stdout.slice",
+      at: 2200,
+      sinceLoadMs: 1300,
+      status: "connected",
+      totalCostMs: 180
+    });
+
+    vi.advanceTimersByTime(5000);
+
+    expect(writes).toHaveLength(1);
+    expect(writes[0]).toMatchObject({
+      event: "perf.summary",
+      count: 3,
+      status: "connected"
+    });
+    expect(writes[0].topEvents[0]).toEqual({ event: "stdout.slice", count: 2 });
+    expect(writes[0].slowest).toMatchObject({
+      event: "layout.refresh.long",
+      scoreMs: 1400
+    });
+    expect(writes[0].latest).toMatchObject({
+      event: "stdout.slice"
+    });
+  });
+
+  it("支持在页面收起前手动 flush，避免丢掉最后一个窗口", () => {
+    const writes = [];
+    const buffer = createTerminalPerfLogBuffer({
+      windowMs: 5000,
+      write(summary) {
+        writes.push(summary);
+      }
+    });
+
+    buffer.push({
+      event: "overlay.sync.long",
+      at: 3000,
+      sinceLoadMs: 2000,
+      status: "connected",
+      costMs: 65000
+    });
+
+    const summary = buffer.flush("page_hide");
+
+    expect(summary).toMatchObject({
+      event: "perf.summary",
+      reason: "page_hide",
+      count: 1
+    });
+    expect(writes).toHaveLength(1);
+  });
+});