68 lines
2.1 KiB
Python
68 lines
2.1 KiB
Python
# Split Miner - BPMN process discovery from event logs.
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# Authors:
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# imacat@mail.imacat.idv.tw (imacat), 2026/3/10
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# AI assistance: Claude Code (Anthropic)
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# Copyright (c) 2026 imacat.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied. See the License for the specific language governing
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# permissions and limitations under the License.
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"""Tests for empty and minimal event logs.
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Verifies proper error handling when input data is
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insufficient for the Split Miner pipeline.
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"""
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from __future__ import annotations
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import unittest
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from split_miner import split_miner
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from split_miner.bpmn import Node, Task
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from split_miner.dfg import DirectlyFollowsGraph
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class TestEmptyLog(unittest.TestCase):
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"""Tests for empty event log handling."""
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def test_empty_log_dfg(self) -> None:
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"""Empty log produces a DFG with no nodes."""
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dfg: DirectlyFollowsGraph = (
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DirectlyFollowsGraph({})
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)
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self.assertEqual(dfg.nodes, set())
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self.assertEqual(dfg.edges, set())
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def test_empty_log_no_sources(self) -> None:
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"""Empty DFG has no sources."""
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dfg: DirectlyFollowsGraph = (
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DirectlyFollowsGraph({})
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)
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self.assertEqual(dfg.sources, set())
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def test_empty_log_split_miner(self) -> None:
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"""Split Miner handles empty log gracefully."""
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model = split_miner({})
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self.assertEqual(len(model.edges), 0)
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def test_single_event_trace(self) -> None:
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"""Single-event trace produces no edges."""
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a: Task = Task("a", "a")
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dfg: DirectlyFollowsGraph = (
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DirectlyFollowsGraph({(a,): 1})
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)
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self.assertEqual(dfg.nodes, {a})
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self.assertEqual(dfg.edges, set())
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if __name__ == "__main__":
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unittest.main()
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