Consolidate serialization tests

Summary: `test_program.py` already has a thorough set of serialization tests. Move over the one regression test from `test_serialize.py` and delete the old file and target.

Reviewed By: larryliu0820

Differential Revision: D48366596

fbshipit-source-id: 39f7d5c556a5d7081ab119dceb0ee76297b139ef

Author: dbort

exir/serialize/test/test_program.py

@@ -266,6 +266,18 @@ def test_round_trip_no_header_no_segments(self) -> None:
         # Programs should be the same.
         self.assert_programs_equal(program, program2)
 
+    def test_round_trip_large_buffer_sizes(self) -> None:
+        """Tests that when the non_const_buffer_sizes contains integers
+        overflowing a signed/unsigned 32 bit integer, we can still serialize the
+        model and get the same program by deserialization.
+        """
+        program = get_test_program()
+        program.execution_plan[0].non_const_buffer_sizes = [0, 2**48]
+        flatbuffer_from_py = serialize_to_flatbuffer(program)
+        self.assert_programs_equal(
+            program, deserialize_from_flatbuffer(flatbuffer_from_py)
+        )
+
     def test_round_trip_with_header_no_segments(self) -> None:
         """Tests that a Program remains the same after serializing and
         deserializing, even when it contains an extended header.

exir/tests/TARGETS

@@ -111,18 +111,6 @@ python_unittest(
     ],
 )
 
-python_unittest(
-    name = "serialize",
-    srcs = [
-        "test_serialize.py",
-    ],
-    deps = [
-        ":lib",
-        "//executorch/exir:print_program",
-        "//executorch/exir/serialize:lib",
-    ],
-)
-
 python_unittest(
     name = "tensor",
     srcs = [