os: skip TestDirFS on wasi until #2827 is fixed

src/os/is_wasi_no_test.go

@@ -0,0 +1,6 @@
+//go:build !wasi
+// +build !wasi
+
+package os_test
+
+const isWASI = false

src/os/is_wasi_test.go

@@ -0,0 +1,6 @@
+//go:build wasi
+// +build wasi
+
+package os_test
+
+const isWASI = true

src/os/os_anyos_test.go

@@ -277,6 +277,10 @@ func TestDirFS(t *testing.T) {
 		t.Log("TODO: implement Readdir for Windows")
 		return
 	}
+	if isWASI {
+		t.Log("TODO: allow foo/bar/. as synonym for path foo/bar on wasi?")
+		return
+	}
 	if err := fstest.TestFS(DirFS("./testdata/dirfs"), "a", "b", "dir/x"); err != nil {
 		t.Fatal(err)
 	}