Fixes #2676

2 files changed, 24 insertions, 2 deletions

diff --git a/src/bun.js/node/types.zig b/src/bun.js/node/types.zig
index 6bee1243f..2dcbad38f 100644
--- a/src/bun.js/node/types.zig
+++ b/src/bun.js/node/types.zig
@@ -1556,9 +1556,9 @@ pub const Path = struct {
         const base_slice = path.slice();
 
         const out = if (isWindows)
-            std.fs.path.dirnameWindows(base_slice) orelse "C:\\"
+            std.fs.path.dirnameWindows(base_slice) orelse "."
         else
-            std.fs.path.dirnamePosix(base_slice) orelse "/";
+            std.fs.path.dirnamePosix(base_slice) orelse ".";
 
         return JSC.ZigString.init(out).toValueGC(globalThis);
     }
diff --git a/test/js/node/path/path.test.js b/test/js/node/path/path.test.js
index 86807b325..d2880f124 100644
--- a/test/js/node/path/path.test.js
+++ b/test/js/node/path/path.test.js
@@ -13,6 +13,28 @@ it("should not inherit Object.prototype", () => {
   expect(path).not.toHaveProperty("toString");
 });
 
+it("path.dirname", () => {
+  const fixtures = [
+    ["yo", "."],
+    ["/yo", "/"],
+    ["/yo/", "/"],
+    ["/yo/123", "/yo"],
+    [".", "."],
+    ["../", "."],
+    ["../../", ".."],
+    ["../../foo", "../.."],
+    ["../../foo/../", "../../foo"],
+    ["/foo/../", "/foo"],
+    ["../../foo/../bar", "../../foo/.."],
+  ];
+  for (const [input, expected] of fixtures) {
+    expect(path.posix.dirname(input)).toBe(expected);
+    if (process.platform !== "win32") {
+      expect(path.dirname(input)).toBe(expected);
+    }
+  }
+});
+
 it("path.basename", () => {
   strictEqual(path.basename(file), "path.test.js");
   strictEqual(path.basename(file, ".js"), "path.test");