feat: add test for plaintext lockfiles

test/cli/install/bun-lock.test.ts

@@ -0,0 +1,45 @@
+import { spawn } from "bun";
+import { expect, it } from "bun:test";
+import { access, copyFile, open, writeFile } from "fs/promises";
+import { bunExe, bunEnv as env, tmpdirSync } from "harness";
+import { join } from "path";
+
+it("should write plaintext lockfiles", async () => {
+  const package_dir = tmpdirSync();
+
+  // copy bar-0.0.2.tgz to package_dir
+  await copyFile(join(__dirname, "bar-0.0.2.tgz"), join(package_dir, "bar-0.0.2.tgz"));
+
+  // Create a simple package.json
+  await writeFile(
+    join(package_dir, "package.json"),
+    JSON.stringify({
+      name: "test-package",
+      version: "1.0.0",
+      dependencies: {
+        "dummy-package": "file:./bar-0.0.2.tgz",
+      },
+    }),
+  );
+
+  // Run 'bun install' to generate the lockfile
+  const installResult = spawn({
+    cmd: [bunExe(), "install", "--save-text-lockfile"],
+    cwd: package_dir,
+    env,
+  });
+  await installResult.exited;
+
+  // Ensure the lockfile was created
+  await access(join(package_dir, "bun.lock"));
+
+  // Assert that the lockfile has the correct permissions
+  const file = await open(join(package_dir, "bun.lock"), "r");
+  const stat = await file.stat();
+  // 0o644 == 33188
+  expect(stat.mode).toBe(33188);
+
+  expect(await file.readFile({ encoding: "utf8" })).toEqual(
+    `{\n  \"lockfileVersion\": 0,\n  \"workspaces\": {\n    \"\": {\n      \"dependencies\": {\n        \"dummy-package\": \"file:./bar-0.0.2.tgz\",\n      },\n    },\n  },\n  \"packages\": {\n    \"dummy-package\": [\"bar@./bar-0.0.2.tgz\", {}],\n  }\n}\n`,
+  );
+});

test/cli/install/bun-lockb.test.ts

@@ -1,6 +1,6 @@
 import { spawn } from "bun";
 import { expect, it } from "bun:test";
-import { access, constants, copyFile, open, writeFile } from "fs/promises";
+import { access, copyFile, open, writeFile } from "fs/promises";
 import { bunExe, bunEnv as env, tmpdirSync } from "harness";
 import { join } from "path";
 
@@ -31,7 +31,7 @@ it("should not print anything to stderr when running bun.lockb", async () => {
   await installResult.exited;
 
   // Ensure the lockfile was created
-  await access(join(package_dir, "bun.lockb"), constants.F_OK);
+  await access(join(package_dir, "bun.lockb"));
 
   // Assert that the lockfile has the correct permissions
   const file = await open(join(package_dir, "bun.lockb"), "r");