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import { gc as bunGC, unsafe } from "bun";
import { heapStats } from "bun:jsc";
import path from "path";
import fs from "fs";
import os from "os";
export const bunEnv: any = {
...process.env,
BUN_DEBUG_QUIET_LOGS: "1",
NO_COLOR: "1",
FORCE_COLOR: undefined,
};
export function bunExe() {
return process.execPath;
}
export function gc(force = true) {
bunGC(force);
}
/**
* The garbage collector is not 100% deterministic
*
* We want to assert that SOME of the objects are collected
* But we cannot reliably assert that ALL of them are collected
*
* Therefore, we check that the count is less than or equal to the expected count
*
* @param type
* @param count
* @param maxWait
* @returns
*/
export async function expectMaxObjectTypeCount(
expect: typeof import("bun:test").expect,
type: string,
count: number,
maxWait = 1000,
) {
gc();
if (heapStats().objectTypeCounts[type] <= count) return;
gc(true);
for (const wait = 20; maxWait > 0; maxWait -= wait) {
if (heapStats().objectTypeCounts[type] <= count) break;
await new Promise(resolve => setTimeout(resolve, wait));
gc();
}
expect(heapStats().objectTypeCounts[type]).toBeLessThanOrEqual(count);
}
// we must ensure that finalizers are run
// so that the reference-counting logic is exercised
export function gcTick(trace = false) {
trace && console.trace("");
// console.trace("hello");
gc();
return new Promise(resolve => setTimeout(resolve, 0));
}
export function withoutAggressiveGC(block: () => unknown) {
if (!unsafe.gcAggressionLevel) return block();
const origGC = unsafe.gcAggressionLevel();
unsafe.gcAggressionLevel(0);
try {
return block();
} finally {
unsafe.gcAggressionLevel(origGC);
}
}
export function hideFromStackTrace(block: CallableFunction) {
Object.defineProperty(block, "name", {
value: "::bunternal::",
configurable: true,
enumerable: true,
writable: true,
});
}
export function tempDirWithFiles(basename: string, files: Record<string, string>) {
const dir = fs.mkdtempSync(path.join(os.tmpdir(), basename + "_"));
for (const [name, contents] of Object.entries(files)) {
fs.writeFileSync(path.join(dir, name), contents);
}
return dir;
}
export function bunRun(file: string, env?: Record<string, string>) {
const result = Bun.spawnSync([bunExe(), file], {
cwd: path.dirname(file),
env: {
...bunEnv,
NODE_ENV: undefined,
...env,
},
});
if (!result.success) throw new Error(result.stderr.toString("utf8"));
return {
stdout: result.stdout.toString("utf8").trim(),
stderr: result.stderr.toString("utf8").trim(),
};
}
export function bunTest(file: string, env?: Record<string, string>) {
const result = Bun.spawnSync([bunExe(), "test", path.basename(file)], {
cwd: path.dirname(file),
env: {
...bunEnv,
NODE_ENV: undefined,
...env,
},
});
if (!result.success) throw new Error(result.stderr.toString("utf8"));
return {
stdout: result.stdout.toString("utf8").trim(),
stderr: result.stderr.toString("utf8").trim(),
};
}
export function bunRunAsScript(dir: string, script: string, env?: Record<string, string>) {
const result = Bun.spawnSync([bunExe(), `run`, `${script}`], {
cwd: dir,
env: {
...bunEnv,
NODE_ENV: undefined,
...env,
},
});
if (!result.success) throw new Error(result.stderr.toString("utf8"));
return {
stdout: result.stdout.toString("utf8").trim(),
stderr: result.stderr.toString("utf8").trim(),
};
}
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