add more tests

[cyyeh]

Summary by CodeRabbit

• New Features
  • Introduced new test cases for bipartite graph functionality, enhancing coverage for various edge cases.
    • Tests include scenarios for disconnected components, single vertex, complex structures, odd cycles, and non-bipartite graphs.

[coderabbitai]

Walkthrough

The pull request introduces comprehensive test cases for the bipartite graph implementation in the test suite. These new test methods cover various scenarios including disconnected graph components, single vertex graphs, complex graph structures, odd-length cycles, and edge case behaviors. The tests aim to validate the robustness of the bipartite graph functionality by examining different graph configurations and ensuring correct identification of bipartite and non-bipartite graphs.

Changes

File

Change Summary

data-structures/graph/test_bipartite_graph.py

Added 6 new test methods to TestBipartiteGraph class: - test_disconnected_components: Checks bipartiteness of disconnected graph components - test_single_vertex: Verifies single vertex graph is bipartite - test_complex_bipartite: Tests complex bipartite graph structure - test_odd_cycle_not_bipartite: Confirms odd-length cycle is not bipartite - test_partite_sets_none_for_non_bipartite: Checks non-bipartite graph behavior - test_add_same_edge_twice: Ensures repeated edge addition doesn't affect bipartiteness

Poem

🐰 A Rabbit's Ode to Graph Testing 🧩

In vertices and edges, we explore,
Bipartite secrets, we now implore,
Disconnected, cyclic, complex and neat,
Our tests make graph logic complete!
Hop, hop, testing with rabbit delight! 🚀

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📜 Recent review details

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📥 Commits

Reviewing files that changed from the base of the PR and between d8c6055 and b4b25bd.

📒 Files selected for processing (1)

• data-structures/graph/test_bipartite_graph.py (1 hunks)

🔇 Additional comments (6)

data-structures/graph/test_bipartite_graph.py (6)

43-52: Good coverage of disconnected bipartite scenarios.
This test accurately checks that a graph with multiple disconnected components remains bipartite overall. An additional optional check could verify each component’s partite sets if deeper validation is desired.

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53-59: Effective single-vertex case handling.
Covering a single-vertex scenario ensures completeness. The assertion verifying the vertex’s presence in one of the sets is appropriate.

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60-75: Thorough test of a larger bipartite configuration.
Building a more complex bipartite graph and confirming the division of vertices into separate sets provides robust coverage. You may optionally test set membership if more precise checks are needed.

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76-85: Correctly identifies odd-cycle non-bipartite scenario.
Detecting odd-length cycles is core to bipartite logic, and this test solidifies coverage for that case.

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86-93: Validation of partite sets in non-bipartite case.
It’s a solid design choice to return None when partite sets don’t exist. This test adds clarity to expected behavior.

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94-101: Ensuring idempotency when adding the same edge multiple times.
This test confirms that duplicate edges don’t alter the bipartite nature or inflate the vertex count. Excellent edge case coverage.

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