}
		t.Fatal("got nil root.")
	}

	// Test dirs
	want := []struct {
		path       string
		isNil      bool
		size, objs int
		oSizes     sizeHistogram
	}{
		{
			path:   "flat",
			size:   1322310 + expectSize,
			objs:   8 + expectSize,
			oSizes: sizeHistogram{0: 2 + expectSize, 1: 3, 2: 2, 4: 1},
		},
		{
			path:   "bucket/",
			size:   20000,
			objs:   2,