i, s1, s2, err, v.err)
			}
			if cnt != v.cnt {
				t.Errorf("test %d, NewReader(%s) with %s discard: got %d headers, want %d headers",
					i, s1, s2, cnt, v.cnt)
			}
		}
	}
}

// TestReadHeaderOnly tests that Reader does not attempt to read special
// header-only files.
func TestReadHeaderOnly(t *testing.T) {
	f, err := os.Open("testdata/hdr-only.tar")

			if _, err := fmt.Sscanf(partPath, "part.%d.meta", &partNum); err == nil {
				partsWithMetaCount[partNum]++
			}
		}
		// Include only part.N.meta files with corresponding part.N
		for partNum, cnt := range partsWithMetaCount {
			if cnt < 2 {
				continue
			}
			partQuorumMap[partNum]++
		}
	}

	var partNums []int
	for partNum, count := range partQuorumMap {
		if count < readQuorum {
			continue
		}