createTestBAM();
SAMDataSource dataSource = new SAMDataSource(Arrays.asList(testBAM),
new ThreadAllocation(),
null,
new GenomeLocParser(header.getSequenceDictionary()),
false,
ValidationStringency.SILENT,
ReadShard.DEFAULT_MAX_READS, // reset ReadShard.MAX_READS to ReadShard.DEFAULT_MAX_READS for each test
downsamplingMethod,
new ValidationExclusion(),