chore: import upstream snapshot with attribution

test/core/sample_components/test_accumulate.py

@@ -0,0 +1,74 @@
+# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+from haystack.testing.sample_components.accumulate import Accumulate, _default_function
+
+
+def my_subtract(first, second):
+    return first - second
+
+
+def test_to_dict():
+    accumulate = Accumulate()
+    res = accumulate.to_dict()
+    assert res == {
+        "type": "haystack.testing.sample_components.accumulate.Accumulate",
+        "init_parameters": {"function": "haystack.testing.sample_components.accumulate._default_function"},
+    }
+
+
+def test_to_dict_with_custom_function():
+    accumulate = Accumulate(function=my_subtract)
+    res = accumulate.to_dict()
+    assert res == {
+        "type": "haystack.testing.sample_components.accumulate.Accumulate",
+        "init_parameters": {"function": "test_accumulate.my_subtract"},
+    }
+
+
+def test_from_dict():
+    data = {"type": "haystack.testing.sample_components.accumulate.Accumulate", "init_parameters": {}}
+    accumulate = Accumulate.from_dict(data)
+    assert accumulate.function == _default_function
+
+
+def test_from_dict_with_default_function():
+    data = {
+        "type": "haystack.testing.sample_components.accumulate.Accumulate",
+        "init_parameters": {"function": "haystack.testing.sample_components.accumulate._default_function"},
+    }
+    accumulate = Accumulate.from_dict(data)
+    assert accumulate.function == _default_function
+
+
+def test_from_dict_with_custom_function():
+    data = {
+        "type": "haystack.testing.sample_components.accumulate.Accumulate",
+        "init_parameters": {"function": "test_accumulate.my_subtract"},
+    }
+    accumulate = Accumulate.from_dict(data)
+    assert accumulate.function == my_subtract
+
+
+def test_accumulate_default():
+    component = Accumulate()
+    results = component.run(value=10)
+    assert results == {"value": 10}
+    assert component.state == 10
+
+    results = component.run(value=1)
+    assert results == {"value": 11}
+    assert component.state == 11
+
+
+def test_accumulate_callable():
+    component = Accumulate(function=my_subtract)
+
+    results = component.run(value=10)
+    assert results == {"value": -10}
+    assert component.state == -10
+
+    results = component.run(value=1)
+    assert results == {"value": -11}
+    assert component.state == -11