60 lines
2.1 KiB
TypeScript
60 lines
2.1 KiB
TypeScript
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import { expect, test } from "bun:test";
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import { mkdirSync, readdirSync } from "fs";
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import { bunEnv, bunExe, tempDir } from "harness";
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import { join } from "path";
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test("runtime transpiler cache is disabled when BUN_INSPECT is set", async () => {
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// When the debugger is active (via BUN_INSPECT env var), the runtime
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// transpiler cache must be disabled. The cached output does not contain the
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// inline //# sourceMappingURL= comment that the debugger frontend needs to
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// correctly map breakpoint line numbers. Without it, debugger; statements
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// and breakpoints resolve to the transpiled line instead of the source line.
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//
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// See: https://github.com/oven-sh/bun/issues/28159
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// Generate a large TypeScript file (>50KB) to trigger caching.
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const lines: string[] = [];
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lines.push("export function run() {");
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for (let i = 0; i < 700; i++) {
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lines.push(` const value_${i}: number = ${i};`);
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lines.push(` if (value_${i} !== ${i}) throw new Error("fail");`);
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lines.push("");
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}
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lines.push(' console.log("ok");');
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lines.push("}");
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lines.push("run();");
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const largeSource = lines.join("\n");
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expect(largeSource.length).toBeGreaterThan(50 * 1024);
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using dir = tempDir("issue-28159", {
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"large_module.ts": largeSource,
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});
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const cacheDir = join(String(dir), "cache");
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mkdirSync(cacheDir, { recursive: true });
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// Run with BUN_INSPECT set — the cache should NOT be populated.
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await using proc = Bun.spawn({
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cmd: [bunExe(), "large_module.ts"],
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cwd: String(dir),
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env: {
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...bunEnv,
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BUN_RUNTIME_TRANSPILER_CACHE_PATH: cacheDir,
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BUN_INSPECT:
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process.platform === "win32" ? "127.0.0.1:0" : "ws+unix:///tmp/bun-inspect-fake-" + Date.now() + ".sock",
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},
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stdout: "pipe",
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stderr: "pipe",
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});
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const [stdout, stderr, exitCode] = await Promise.all([proc.stdout.text(), proc.stderr.text(), proc.exited]);
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expect(stdout.trim()).toBe("ok");
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expect(exitCode).toBe(0);
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// The cache directory should be empty because the cache was disabled.
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const cacheFiles = readdirSync(cacheDir);
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expect(cacheFiles).toEqual([]);
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});
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