Create memmapped files on the fly

.gitignore

@@ -97,7 +97,6 @@ nosetests.xml
 coverage.xml
 *,cover
 .hypothesis/
-!testdata/*.mmap
 
 # Translations
 *.mo

caiman/tests/test_memmapping.py

@@ -1,10 +1,13 @@
 import pathlib
 
 import numpy as np
+import nose
 
 from caiman import mmapping
 from caiman.paths import caiman_datadir
 
+twod_fname = pathlib.Path(caiman_datadir()) / 'testdata/memmap__d1_10_d2_11_d3_1_order_F_frames_12_.mmap'
+threed_fname = pathlib.Path(caiman_datadir()) / 'testdata/memmap__d1_10_d2_11_d3_13_order_F_frames_12_.mmap'
 
 def test_load_raises_wrong_ext():
     fname = "a.mmapp"
@@ -26,15 +29,30 @@ def test_load_raises_multiple_ext():
         assert False
 
 
+def setup_2d_mmap():
+    np.memmap(twod_fname, mode='w+', dtype=np.float32, shape=(12, 10, 11, 13), order='F')
+
+def teardown_2d_mmap():
+    twod_fname.unlink()
+
+def setup_3d_mmap():
+    np.memmap(threed_fname, mode='w+', dtype=np.float32, shape=(12, 10, 11, 13), order='F')
+
+def teardown_3d_mmap():
+    threed_fname.unlink()
+
+
+@nose.with_setup(setup_2d_mmap, teardown_2d_mmap)
 def test_load_successful_2d():
-    fname = pathlib.Path(caiman_datadir()) / 'testdata' / 'memmap__d1_10_d2_11_d3_1_order_F_frames_12_.mmap'
+    fname = pathlib.Path(caiman_datadir()) / 'testdata' / twod_fname
     Yr, (d1, d2), T = mmapping.load_memmap(str(fname))
     assert (d1, d2) == (10, 11)
     assert T == 12
+    assert isinstance(Yr, np.memmap)
 
-
+@nose.with_setup(setup_3d_mmap, teardown_3d_mmap)
 def test_load_successful_3d():
-    fname = pathlib.Path(caiman_datadir()) / 'testdata' / 'memmap__d1_10_d2_11_d3_13_order_F_frames_12_.mmap'
+    fname = pathlib.Path(caiman_datadir()) / 'testdata' / threed_fname
     Yr, (d1, d2, d3), T = mmapping.load_memmap(str(fname))
     assert (d1, d2, d3) == (10, 11, 13)
     assert T == 12