enh: add test to cover new lines

nitransforms/tests/data/affine-RAS.afni-array

@@ -0,0 +1,3 @@
+# 3dvolreg matrices (DICOM-to-DICOM, row-by-row):
+0.999999	-0.000999999	-0.001	-4	0.00140494	0.621609	0.783327	-2	-0.000161717	-0.783327	0.62161	-1
+0.999999	-0.000999999	-0.001	-4	0.00140494	0.621609	0.783327	-2	-0.000161717	-0.783327	0.62161	-1

nitransforms/tests/test_io.py

@@ -180,7 +180,7 @@ def test_LT_conversions(data_path, fname):
         "oblique",
     ],
 )
-@pytest.mark.parametrize("sw", ["afni", "fsl", "fs", "itk"])
+@pytest.mark.parametrize("sw", ["afni", "fsl", "fs", "itk", "afni-array"])
 def test_Linear_common(tmpdir, data_path, sw, image_orientation, get_testdata):
     tmpdir.chdir()
 
@@ -206,6 +206,9 @@ def test_Linear_common(tmpdir, data_path, sw, image_orientation, get_testdata):
 
     fname = f"affine-{image_orientation}.{sw}{ext}"
 
+    if sw == "afni-array":
+        fname.replace(image_orientation, "RAS")
+
     # Test the transform loaders are implemented
     xfm = factory.from_filename(data_path / fname)
 
@@ -222,6 +225,9 @@ def test_Linear_common(tmpdir, data_path, sw, image_orientation, get_testdata):
 
     # Test from_ras
     RAS = from_matvec(euler2mat(x=0.9, y=0.001, z=0.001), [4.0, 2.0, -1.0])
+    if sw == "afni-array":
+        RAS = [RAS, RAS]
+
     xfm = factory.from_ras(RAS, reference=reference, moving=moving)
     assert np.allclose(xfm.to_ras(reference=reference, moving=moving), RAS)