Regression tests

Signed-off-by: miguelgfierro <miguelgfierro@users.noreply.github.com>

tests/regression/test_compatibility_tf.py

@@ -0,0 +1,14 @@
+# Copyright (c) Recommenders contributors.
+# Licensed under the MIT License.
+
+
+import pytest
+
+
+@pytest.mark.gpu
+def test_compatibility_tf():
+    """Some of our code uses TF1 and some TF2. Here we just check that we
+    can import both versions.
+    """
+    import tensorflow as tf
+    from tensorflow.compat.v1 import placeholder