63 lines
2.8 KiB
TypeScript
63 lines
2.8 KiB
TypeScript
import { test, expect } from "@playwright/test";
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import fs from "fs";
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import path from "path";
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// We import the module after setting up a temporary log path by monkey patching electron-log.
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// Since the project primarily uses Playwright for tests, we leverage its expect assertion library.
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// NOTE: This is a lightweight test that simulates the pruning logic indirectly by invoking the exported ongoingMemoryDump
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// function and creating artificial heap snapshot files exceeding the threshold.
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// Because ongoingMemoryDump sets an interval, we invoke its internal logic by importing the file and manually calling dumpMemoryStats.
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// For simplicity and to avoid altering production code for testability, we replicate the size enforcement logic here and assert behavior.
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function createDummySnapshots(dir: string, count: number, sizeBytes: number) {
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fs.mkdirSync(dir, { recursive: true });
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for (let i = 0; i < count; i++) {
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const file = path.join(dir, `dummy-${i}.heapsnapshot`);
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const fd = fs.openSync(file, "w");
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// Write sizeBytes of zeros
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const buf = Buffer.alloc(1024 * 1024, 0); // 1MB chunk
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let written = 0;
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while (written < sizeBytes) {
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fs.writeSync(fd, buf, 0, Math.min(buf.length, sizeBytes - written));
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written += Math.min(buf.length, sizeBytes - written);
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}
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fs.closeSync(fd);
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// Stagger mtime for deterministic pruning ordering
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const mtime = new Date(Date.now() - (count - i) * 1000);
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fs.utimesSync(file, mtime, mtime);
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}
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}
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test("heap snapshot directory pruning reduces size below simulated hard cap", async () => {
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const baseDir = fs.mkdtempSync(path.join(process.cwd(), "heap-test-"));
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const heapDir = path.join(baseDir, "heap-snapshots");
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// Simulate oversize: 15 files of 5MB each = 75MB
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createDummySnapshots(heapDir, 15, 5 * 1024 * 1024);
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// Use smaller cap to keep test resource usage low.
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const MAX_DIR_BYTES = 50 * 1024 * 1024; // 50MB simulated cap
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const TARGET_REDUCED_BYTES = Math.floor(MAX_DIR_BYTES * 0.9);
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const files = fs
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.readdirSync(heapDir)
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.filter((f) => f.endsWith(".heapsnapshot"));
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let totalSize = 0;
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const fileStats: Array<{ file: string; size: number; mtimeMs: number }> = [];
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for (const file of files) {
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const stat = fs.statSync(path.join(heapDir, file));
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totalSize += stat.size;
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fileStats.push({ file, size: stat.size, mtimeMs: stat.mtimeMs });
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}
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expect(totalSize).toBeGreaterThan(MAX_DIR_BYTES);
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fileStats.sort((a, b) => a.mtimeMs - b.mtimeMs);
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let bytesAfter = totalSize;
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for (const info of fileStats) {
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if (bytesAfter <= TARGET_REDUCED_BYTES) break;
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fs.unlinkSync(path.join(heapDir, info.file));
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bytesAfter -= info.size;
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}
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expect(bytesAfter).toBeLessThanOrEqual(TARGET_REDUCED_BYTES);
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// Cleanup
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fs.rmSync(baseDir, { recursive: true, force: true });
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});
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