TEST: Check gifti/mesh handling one triangle

tests/test_gifti.py

@@ -381,3 +381,21 @@ def test_GiftiMesh_needsFixing():
         surf = gifti.GiftiMesh(fname, fixWinding=True)
 
         assert np.all(np.isclose(surf.indices, idxs_fixed))
+
+
+def test_loadGiftiMesh_onetriangle():
+    verts = np.array([[0, 0, 0], [1, 1, 1], [0, 1, 0]])
+    idxs  = np.array([[0, 1, 2]])
+    verts = nib.gifti.GiftiDataArray(verts, intent='NIFTI_INTENT_POINTSET')
+    idxs  = nib.gifti.GiftiDataArray(idxs,  intent='NIFTI_INTENT_TRIANGLE')
+    gimg  = nib.gifti.GiftiImage(darrays=[verts, idxs])
+
+    with tempdir():
+        fname = op.abspath('test.gii')
+        gimg.to_filename(fname)
+
+        gimg, tris, verts, _ = gifti.loadGiftiMesh('test.gii')
+        verts = verts[0]
+
+        assert verts.shape == (3, 3)
+        assert tris.shape  == (1, 3)

tests/test_mesh.py

@@ -234,6 +234,13 @@ def test_normals():
         -fnormals, fslmesh.calcFaceNormals(verts, triangles_cw)))
     assert np.all(np.isclose(
         fnormals, fslmesh.calcFaceNormals(verts, triangles_ccw)))
+
+    # Make sure result is (1, 3) for input of (1, 3)
+    onetri = np.atleast_2d(triangles_ccw[0, :])
+    result = fslmesh.calcFaceNormals(verts, onetri)
+    assert result.shape == (1, 3)
+    assert np.all(np.isclose(fnormals[0, :], result))
+
     assert np.all(np.isclose(
         -vnormals, fslmesh.calcVertexNormals(verts, triangles_cw, -fnormals)))
     assert np.all(np.isclose(