Switch to using the dep tool and update all the dependencies

vendor/bazil.org/fuse/fs/serve_darwin_test.go

@@ -0,0 +1,30 @@
+package fs_test
+
+import (
+	"testing"
+
+	"bazil.org/fuse/fs/fstestutil"
+	"golang.org/x/sys/unix"
+)
+
+type exchangeData struct {
+	fstestutil.File
+	// this struct cannot be zero size or multiple instances may look identical
+	_ int
+}
+
+func TestExchangeDataNotSupported(t *testing.T) {
+	t.Parallel()
+	mnt, err := fstestutil.MountedT(t, fstestutil.SimpleFS{&fstestutil.ChildMap{
+		"one": &exchangeData{},
+		"two": &exchangeData{},
+	}}, nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer mnt.Close()
+
+	if err := unix.Exchangedata(mnt.Dir+"/one", mnt.Dir+"/two", 0); err != unix.ENOTSUP {
+		t.Fatalf("expected ENOTSUP from exchangedata: %v", err)
+	}
+}