}
		gotInverted := invertSparseEntries(append([]sparseEntry{}, v.in...), v.size)
		if !equalSparseEntries(gotInverted, v.wantInverted) {
			t.Errorf("test %d, inverseSparseEntries():\ngot  %v\nwant %v", i, gotInverted, v.wantInverted)
		}
	}
}

func TestFileInfoHeader(t *testing.T) {
	fi, err := os.Stat("testdata/small.txt")
	if err != nil {
		t.Fatal(err)
	}