chore: import upstream snapshot with attribution

test/dataclasses/test_breakpoints.py

@@ -0,0 +1,39 @@
+# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import warnings
+
+import pytest
+
+from haystack.dataclasses.breakpoints import Breakpoint, PipelineSnapshot, PipelineState
+
+
+def test_pipeline_state_no_warning_on_init():
+    with warnings.catch_warnings():
+        warnings.simplefilter("error", Warning)
+        PipelineState(inputs={}, component_visits={}, pipeline_outputs={})
+
+
+def test_pipeline_state_warn_on_inplace_mutation():
+    state = PipelineState(inputs={}, component_visits={}, pipeline_outputs={})
+    with pytest.warns(Warning, match="dataclasses.replace"):
+        state.inputs = {"new": "value"}
+
+
+def test_pipeline_snapshot_no_warning_on_init():
+    state = PipelineState(inputs={}, component_visits={"comp": 1}, pipeline_outputs={})
+    bp = Breakpoint(component_name="comp")
+    with warnings.catch_warnings():
+        warnings.simplefilter("error", Warning)
+        PipelineSnapshot(original_input_data={}, ordered_component_names=["comp"], pipeline_state=state, break_point=bp)
+
+
+def test_pipeline_snapshot_warn_on_inplace_mutation():
+    state = PipelineState(inputs={}, component_visits={"comp": 1}, pipeline_outputs={})
+    bp = Breakpoint(component_name="comp")
+    snap = PipelineSnapshot(
+        original_input_data={}, ordered_component_names=["comp"], pipeline_state=state, break_point=bp
+    )
+    with pytest.warns(Warning, match="dataclasses.replace"):
+        snap.original_input_data = {"new": "data"}