refactored error message and created unit test.

Author: j-c-c

src/aspire/source/image.py

@@ -774,8 +774,10 @@ def __init__(self, im, metadata=None, angles=None):
             try:
                 im = Image(im)
             except Exception as e:
-                logger.error("Creating Image object from Numpy array failed.")
-                raise e
+                raise RuntimeError(
+                    "Creating Image object from Numpy array failed."
+                    f" Original error: {str(e)}"
+                )
 
         super().__init__(
             L=im.res, n=im.n_images, dtype=im.dtype, metadata=metadata, memory=None

tests/test_array_image_source.py

@@ -71,6 +71,16 @@ def testArrayImageSourceFromNumpy(self):
         # Comparison should be yield identity
         self.assertTrue(np.allclose(ims_np, self.ims_np))
 
+    def testArrayImageSourceNumpyError(self):
+        """
+        Test that ArrayImageSource when instantiated with incorrect input
+        gives appropriate error.
+        """
+
+        # Test we raise with expected message from getter.
+        with raises(RuntimeError, match=r"Creating Image object from Numpy.*"):
+            _ = ArrayImageSource(np.empty((3, 2, 1)))
+
     def testArrayImageSourceAngGetterError(self):
         """
         Test that ArrayImageSource when instantiated without required