Setup unittesting with testthat

[Al-Murphy]

Just assuming this is the initial set up to enable unit testing and not the addition of further tests? If so this was completed with the mean CTD test

[NathanSkene]

I was thinking addition of extra tests, idea is that codecov should report at least 80% covered by tests

Additional tests could be:

• Running cortex_mrna$exp = fix.bad.mgi.symbols(cortex_mrna$exp,mrk_file_path="MRK_List2.rpt") (from the vignette) removes/fixes an expected set of genes

• Running full_results = bootstrap.enrichment.test(sct_data=ctd,hits=mouse.hits,bg=mouse.bg,reps=reps,annotLevel=level) gives microglia as the only significant enrichment

• Running tt_results = ewce_expression_data(sct_data=ctd,tt=tt_alzh,annotLevel=1,ttSpecies="human",sctSpecies="mouse") gives the results shown in the vignette

• Also include a test for controlled_geneset_enrichment

Because EWCE uses random permutations, the 'same result' should not depend on exact pvalues.

[NathanSkene]

Another test:

• Iba1 is most specific to microglia (based on sorting of specificity matrix)
• Pvalb is most specific to interneurons (based on sorting of specificity matrix)