//A2M 2 genome.wustl.edu 36 12 9150104 9150104 + Missense_Mutation SNP C C G Unknown Unknown TCGA-02-0024-01B-01W TCGA-02-0024-10A-01W C C C G C C Valid Valid Somatic Phase_I
//There should be 1 track per sampleId
Set<String> sampleIds = new HashSet<String>(trackList.size());
for (FeatureTrack track : trackList) {
MutationTrack mutTrack = (MutationTrack) track;
assertFalse(sampleIds.contains(mutTrack.getName()));
sampleIds.add(mutTrack.getName());
if (mutTrack.getName().equals(testSampleId)) {
List<Feature> features = mutTrack.getFeatures("chr12", testStart, testEnd);
assertEquals(1, features.size());
Mutation mut = (Mutation) features.get(0);
assertEquals(testSampleId, mut.getSampleId());
assertEquals(testChr, mut.getChr());