TEST: use fixed seed; make radio/neuro images world-aligned for convenience

unit_tests/avwutils/fslcomplex/feedsRun

@@ -30,22 +30,28 @@ def imtest(path):
 
 # radio=[True|False] -> whether or not
 # to add a flip on the affine X axis
-def create_test_input_data(radio):
+def create_test_input_data(radio, seed=1):
+
+    np.random.seed(seed)
 
     real   = np.random.randint(0, 100, (10, 10, 10)).astype(np.float32)
     imag   = np.random.randint(0, 100, (10, 10, 10)).astype(np.float32)
+    affine = np.diag([3, 3, 3, 1])
+
+    if radio:
+        affine[0, 0] *= -1
+        affine[:3, 3] = [37, 20, 30]
+        real          = np.flip(real, 0)
+        imag          = np.flip(imag, 0)
+    else:
+        affine[:3, 3] = [10, 20, 30]
+
     comp   = real + imag * 1j
     abso   = np.abs(comp)
     phase  = np.arctan2(comp.imag, comp.real)
     comp4d = np.concatenate((comp.reshape(10, 10, 10, 1),
                              comp.reshape(10, 10, 10, 1)), 3)
 
-    affine        = np.diag([3, 3, 3, 1])
-    affine[:3, 3] = [10, 20, 30]
-
-    if radio:
-        affine[0, 0] *= -1
-
     real   = nib.Nifti1Image(real,   affine)
     imag   = nib.Nifti1Image(imag,   affine)
     comp   = nib.Nifti1Image(comp,   affine)