1 files changed, 30 insertions, 1 deletions
diff --git a/test/js/node/fs/fs.test.ts b/test/js/node/fs/fs.test.ts
index 3e030f609..f9ef38fe8 100644
--- a/test/js/node/fs/fs.test.ts
+++ b/test/js/node/fs/fs.test.ts
@@ -136,6 +136,35 @@ describe("copyFileSync", () => {
     expect(Bun.hash(readFileSync(tempdir + "/copyFileSync.dest.blob"))).toBe(Bun.hash(buffer.buffer));
   });
 
+  it("constants are right", () => {
+    expect(fs.constants.COPYFILE_EXCL).toBe(1);
+    expect(fs.constants.COPYFILE_FICLONE).toBe(2);
+    expect(fs.constants.COPYFILE_FICLONE_FORCE).toBe(4);
+  });
+
+  it("FICLONE option does not error ever", () => {
+    const tempdir = `${tmpdir()}/fs.test.js/${Date.now()}.FICLONE/1234/hi`;
+    expect(existsSync(tempdir)).toBe(false);
+    expect(tempdir.includes(mkdirSync(tempdir, { recursive: true })!)).toBe(true);
+
+    // that don't exist
+    copyFileSync(import.meta.path, tempdir + "/copyFileSync.js", fs.constants.COPYFILE_FICLONE);
+    copyFileSync(import.meta.path, tempdir + "/copyFileSync.js", fs.constants.COPYFILE_FICLONE);
+    copyFileSync(import.meta.path, tempdir + "/copyFileSync.js", fs.constants.COPYFILE_FICLONE);
+  });
+
+  it("COPYFILE_EXCL works", () => {
+    const tempdir = `${tmpdir()}/fs.test.js/${Date.now()}.COPYFILE_EXCL/1234/hi`;
+    expect(existsSync(tempdir)).toBe(false);
+    expect(tempdir.includes(mkdirSync(tempdir, { recursive: true })!)).toBe(true);
+
+    // that don't exist
+    copyFileSync(import.meta.path, tempdir + "/copyFileSync.js", fs.constants.COPYFILE_EXCL);
+    expect(() => {
+      copyFileSync(import.meta.path, tempdir + "/copyFileSync.js", fs.constants.COPYFILE_EXCL);
+    }).toThrow();
+  });
+
   if (process.platform === "linux") {
     describe("should work when copyFileRange is not available", () => {
       it("on large files", () => {
@@ -212,7 +241,7 @@ describe("copyFileSync", () => {
 
 describe("mkdirSync", () => {
   it("should create a directory", () => {
-    const tempdir = `${tmpdir()}/fs.test.js/${Date.now()}/1234/hi`;
+    const tempdir = `${tmpdir()}/fs.test.js/${Date.now()}.mkdirSync/1234/hi`;
     expect(existsSync(tempdir)).toBe(false);
     expect(tempdir.includes(mkdirSync(tempdir, { recursive: true })!)).toBe(true);
     expect(existsSync(tempdir)).toBe(true);