tst: add minor regression test

Author: mgxd

tests/test_regression.py

@@ -0,0 +1,68 @@
+"""Testing conversion with conversion saved on datalad"""
+from tempfile import mkdtemp
+import os
+import os.path as op
+import json
+from glob import glob
+
+import pytest
+
+have_datalad = True
+try:
+	from datalad import api # to pull and grab data
+except ImportError:
+	have_datalad = False
+
+from heudiconv.cli.run import main as runner
+import heudiconv
+
+
+def gen_heudiconv_args(datadir, outdir, subject, heuristic_file, xargs=None):
+	heuristic = op.realpath(op.join(
+								op.dirname(heudiconv.__file__),
+					        	'..',
+			        			'heuristics',
+			        			heuristic_file))
+
+	args = ["-d", op.join(datadir, 'sourcedata/{subject}/*/*/*.tgz'),
+			"-c", "dcm2niix",
+			"-o", outdir,
+			"-s", subject,
+			"-f", heuristic,
+			"--bids",
+			]
+	if xargs:
+		args += xargs
+
+	return args
+
+def fetch_data(tmpdir, subject):
+	"""Fetches some test dicoms"""
+	targetdir = os.path.join(tmpdir, 'QA')
+	api.install(path=targetdir,
+				source='///dbic/QA')
+	api.get('{}/sourcedata/{}'.format(targetdir, subject))
+	return targetdir
+
+@pytest.mark.parametrize('subject', ['sub-sid000143'])
+@pytest.mark.parametrize('heuristic', ['dbic_bids.py'])
+@pytest.mark.skipif(not have_datalad, reason="no datalad")
+def test_conversion(tmpdir, subject, heuristic):
+	tmpdir.chdir()
+	datadir = fetch_data(tmpdir.strpath, subject)
+	outdir = tmpdir.mkdir('out').strpath
+
+	args = gen_heudiconv_args(datadir, outdir, subject, heuristic)
+	runner(args) # run conversion
+
+	# verify functionals were converted
+	assert glob('{}/{}/func/*'.format(outdir, subject)) == \
+		   glob('{}/{}/func/*'.format(datadir, subject))
+
+	# compare some json metadata
+	json_ = '{}/task-rest_acq-24mm64sl1000tr32te600dyn_bold.json'.format
+	orig, conv = (json.load(open(json_(datadir))),
+				  json.load(open(json_(outdir))))
+	keys = ['EchoTime', 'MagneticFieldStrength', 'Manufacturer', 'SliceTiming']
+	for key in keys:
+		assert orig[key] == conv[key]