Add cycle graph test for pgr_cuthillMckeeOrdering #428
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WalkthroughThis update extends the Changes
Sequence Diagram(s)sequenceDiagram
participant TR as Test Runner
participant EC as edge_cases()
participant CGT as cycle_graph_table
participant Q12 as Prepared Statement q12
participant CMK as pgr_cuthillMckeeOrdering()
participant Validator as set_eq
TR->>EC: Invoke edge_cases test
EC->>CGT: Create table and insert cycle graph data
EC->>Q12: Execute query for cycle graph data
Q12-->>EC: Return cycle graph data
EC->>Validator: Validate cycle graph structure
EC->>CMK: Run ordering via prepared statement r13
CMK-->>EC: Return vertex ordering
EC->>Validator: Validate vertex ordering
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Actionable comments posted: 0
🧹 Nitpick comments (1)
pgtap/ordering/cuthillMckeeOrdering/edge_cases.pg (1)
203-209: Add explanation for the expected ordering.The expected ordering (1, 4, 2, 3) is verified, but it would be helpful to add a brief comment explaining why this specific ordering is expected for a cycle graph when using the Cuthill-McKee algorithm.
RETURN QUERY SELECT set_eq('r13', $$VALUES (1, 1), -- Vertex 1 is placed first (2, 4), -- Vertex 4 is placed second (3, 2), -- Vertex 2 is placed third (4, 3)$$, -- Vertex 3 is placed fourth + -- In Cuthill-McKee ordering, after starting with vertex 1, + -- it processes its neighbors in ascending order (4 comes before 2) 'r13: Cycle graph ordering');
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pgtap/ordering/cuthillMckeeOrdering/edge_cases.pg(2 hunks)
🔇 Additional comments (7)
pgtap/ordering/cuthillMckeeOrdering/edge_cases.pg (7)
22-22: Plan count updated correctly to match new tests.The plan count has been increased from 11 to 13 to accommodate the new cycle graph test (2 additional test cases).
170-170: Good addition of the cycle graph test case.Adding a cycle graph test is valuable as it tests a specific graph topology not covered by the existing test cases.
172-178: Table definition follows consistent pattern.The
cycle_graph_tabledefinition matches the schema of other test tables in this file, which is good for consistency.
180-184: Clear data insertion with helpful comments.The edge insertions clearly define a cycle graph (1->2->3->4->1) and the inline comments make the structure easy to understand.
186-189: Query preparation follows established pattern.The
q12prepared statement follows the same pattern as other queries in the file, maintaining consistency.
191-198: Test validation is comprehensive.The
set_eqvalidation ensures that the cycle graph data matches exactly what was inserted, maintaining the integrity of the test.
199-202: Ordering function test follows established pattern.The
r13prepared statement correctly tests thepgr_cuthillMckeeOrderingfunction on the cycle graph.
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Looks nice, just some changes are needed. we can discuss in the next show and tell. |
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Thank you! I’m looking forward to the discussion with you! |
Changes proposed in this pull request:
pgtap/ordering/cuthillMckeeOrdering/edge_cases.pg.Test Output
Below is the pgTAP test output for the changes:
@pgRouting/admins
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