66 lines
2.4 KiB
Python
66 lines
2.4 KiB
Python
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# -*- coding: utf-8 -*-
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"""性能预算与懒加载策略冒烟脚本（Issue #54）。
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直接运行 ``python _sanity_check.py`` 验证：默认预算可构造、校验器对达标/超预算
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场景给出正确状态、懒加载决策器对视口内外 widget 给出 immediate/idle。零第三方依赖。
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"""
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import importlib.util
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import os
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import sys
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# perf-budget 目录名含连字符，按文件路径加载为合法包 perf_budget。
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_PKG_DIR = os.path.dirname(os.path.abspath(__file__))
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def _load_pkg(name, path):
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if name in sys.modules:
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return
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spec = importlib.util.spec_from_file_location(
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name, os.path.join(path, "__init__.py"),
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submodule_search_locations=[path])
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mod = importlib.util.module_from_spec(spec)
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sys.modules[name] = mod
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spec.loader.exec_module(mod)
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_load_pkg("perf_budget", _PKG_DIR)
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from perf_budget import ( # noqa: E402
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BudgetStatus, BudgetVerifier, LazyLoadPlanner, PerformanceBudget,
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ResourceMeasurement, ResourceType, WidgetLayout)
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def main() -> int:
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# 1) 性能预算：达标场景
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budget = PerformanceBudget.default_cockpit()
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report = BudgetVerifier(budget).verify([
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ResourceMeasurement("app.js", ResourceType.JS, 700, block_render=True),
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ResourceMeasurement("app.css", ResourceType.CSS, 250, block_render=True),
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ResourceMeasurement("doc.html", ResourceType.HTML, 150, block_render=True),
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])
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assert report.status is BudgetStatus.PASS, report.reason
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print(f"[OK] 性能预算达标：首屏 {report.first_paint_ms:.0f}ms "
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f"≤ {report.budget_ms:.0f}ms（{report.reason}）")
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# 2) 超预算场景
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bad = BudgetVerifier(budget).verify([
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ResourceMeasurement("big.js", ResourceType.JS, 950, block_render=True),
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])
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assert bad.status is BudgetStatus.FAIL
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print(f"[OK] 性能预算告警：{bad.overrun[0].reason} → {bad.overrun[0].advice}")
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# 3) 懒加载：视口内外分流
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plan = LazyLoadPlanner().plan([
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WidgetLayout("proc", "process_view", y=0, h=4, always_load=True),
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WidgetLayout("trend", "trend", y=10, h=2),
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], scroll_y_rows=0)
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assert plan.immediate_ids == ["proc"]
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assert plan.idle_ids == ["trend"]
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print(f"[OK] 懒加载：immediate={plan.immediate_ids} idle={plan.idle_ids}")
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print("性能预算与懒加载策略冒烟通过 ✅")
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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