The test data used here can be generated using sim_reads and 
sim_reads_tran. Since these programs aren't installed with the
package, the data has been generated and added here, and the 
following code provided in case it is possible to install and 
generate that data on the testing machine itself.

# simulate reads for idba_ud
sim_reads 220668.fa 220668.reads-10 --paired --depth 10 
sim_reads 321956.fa 321956.reads-100 --paired --depth 100
sim_reads 557433.fa 557433.reads-1000 --paired --depth 1000
cat 220668.reads-10 321956.reads-100 557433.reads-1000 > meta.reads

# simulate reads for idba_hybrid
sim_reads ecoli_target.fa reads-4 --depth 4 --paired
sim_reads ecoli_target.fa reads-8 --depth 8 --paired
sim_reads ecoli_target.fa reads-12 --depth 12 --paired
sim_reads ecoli_target.fa reads-16 --depth 16 --paired
sim_reads ecoli_target.fa reads-20 --depth 20 --paired
cat reads-4 reads-8 reads-12 reads-16 reads-20 > meta.reads

# simulate reads for idba_tran
sim_reads_tran found-transcripts.fa reads.fa
