t.Errorf("%s: Discard(%d) = (%v, %v); want (%v, %v)", tt.name, tt.n, discarded, ge, tt.want, we)
			continue
		}
		if bn := br.Buffered(); bn != tt.wantBuffered {
			t.Errorf("%s: after Discard, Buffered = %d; want %d", tt.name, bn, tt.wantBuffered)
		}
	}

}

func TestReaderSize(t *testing.T) {
	if got, want := NewReader(nil).Size(), DefaultBufSize; got != want {

		}
	}

	// TestXLStorage case with invalid volume name.
	// A valid volume name should be at least of size 3.
	err = xlStorage.AppendFile(context.Background(), "bn", "yes", []byte("hello, world"))
	if err != errVolumeNotFound {
		t.Fatalf("expected: \"Invalid argument error\", got: \"%s\"", err)
	}
}

// TestXLStorage xlStorage.RenameFile()