Refactor Regression Tests for CASE statement (#1268)

Added some new cases to CASE statement regression tests to capture cases that were not tested for before. Refactored existing test cases to improve readability
apache · Oct 16, 2023 · 1846a14 · 1846a14
1 parent 8d4f513
commit 1846a14
Show file tree

Hide file tree

Showing 2 changed files with 94 additions and 21 deletions.
diff --git a/regress/expected/expr.out b/regress/expected/expr.out
@@ -6352,32 +6352,22 @@ NOTICE:  graph "case_statement" has been created
 
 (1 row)
 
-SELECT * FROM cypher('case_statement', $$CREATE ({i: 1, j: null})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 1, i: 1, j: null})-[:connected_to {id: 1, k:0}]->({id: 2, i: 'a', j: 'b'})$$) AS (result agtype);
  result 
 --------
 (0 rows)
 
-SELECT * FROM cypher('case_statement', $$CREATE ({i: 'a', j: 'b'})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 3, i: 0, j: 1})-[:connected_to {id: 2, k:1}]->({id: 4, i: true, j: false})$$) AS (result agtype);
  result 
 --------
 (0 rows)
 
-SELECT * FROM cypher('case_statement', $$CREATE ({i: 0, j: 1})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 5, i: [], j: [0,1,2]})$$) AS (result agtype);
  result 
 --------
 (0 rows)
 
-SELECT * FROM cypher('case_statement', $$CREATE ({i: true, j: false})$$) AS (result agtype);
- result 
---------
-(0 rows)
-
-SELECT * FROM cypher('case_statement', $$CREATE ({i: [], j: [0,1,2]})$$) AS (result agtype);
- result 
---------
-(0 rows)
-
-SELECT * FROM cypher('case_statement', $$CREATE ({i: {}, j: {i:1}})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 6, i: {}, j: {i:1}})$$) AS (result agtype);
  result 
 --------
 (0 rows)
@@ -6462,6 +6452,57 @@ $$ ) AS (j agtype, case_statement agtype);
  {"i": 1}  | {"i": 1}
 (6 rows)
 
+--CASE agtype_vertex WHEN value THEN result END
+SELECT * FROM cypher('case_statement', $$
+  MATCH (n)
+  RETURN CASE n
+    WHEN null THEN 'should not return me'
+    WHEN 'agtype_string' THEN 'wrong'
+    WHEN n THEN n
+    ELSE 'no n'
+  END
+$$ ) AS (case_statement agtype);
+                                         case_statement                                         
+------------------------------------------------------------------------------------------------
+ {"id": 281474976710657, "label": "", "properties": {"i": 1, "id": 1}}::vertex
+ {"id": 281474976710658, "label": "", "properties": {"i": "a", "j": "b", "id": 2}}::vertex
+ {"id": 281474976710659, "label": "", "properties": {"i": 0, "j": 1, "id": 3}}::vertex
+ {"id": 281474976710660, "label": "", "properties": {"i": true, "j": false, "id": 4}}::vertex
+ {"id": 281474976710661, "label": "", "properties": {"i": [], "j": [0, 1, 2], "id": 5}}::vertex
+ {"id": 281474976710662, "label": "", "properties": {"i": {}, "j": {"i": 1}, "id": 6}}::vertex
+(6 rows)
+
+--CASE with match and edges
+SELECT * FROM cypher('case_statement', $$
+  MATCH (n)-[e]->(m)
+  RETURN CASE
+    WHEN null THEN 'should not return me'
+    WHEN n.i = 1 THEN n
+    WHEN n.i = 0 THEN m
+    ELSE 'none'
+  END
+$$ ) AS (case_statement agtype);
+                                        case_statement                                        
+----------------------------------------------------------------------------------------------
+ {"id": 281474976710657, "label": "", "properties": {"i": 1, "id": 1}}::vertex
+ {"id": 281474976710660, "label": "", "properties": {"i": true, "j": false, "id": 4}}::vertex
+(2 rows)
+
+SELECT * FROM cypher('case_statement', $$
+  MATCH (n)-[e]->(m)
+  RETURN CASE
+    WHEN null THEN 'should not return me'
+    WHEN e.k = 1 THEN e
+    WHEN e.k = 0 THEN e
+    ELSE 'none'
+  END
+$$ ) AS (case_statement agtype);
+                                                                 case_statement                                                                  
+-------------------------------------------------------------------------------------------------------------------------------------------------
+ {"id": 844424930131969, "label": "connected_to", "end_id": 281474976710658, "start_id": 281474976710657, "properties": {"k": 0, "id": 1}}::edge
+ {"id": 844424930131970, "label": "connected_to", "end_id": 281474976710660, "start_id": 281474976710659, "properties": {"k": 1, "id": 2}}::edge
+(2 rows)
+
 -- RETURN * and (u)--(v) optional forms
 SELECT create_graph('opt_forms');
 NOTICE:  graph "opt_forms" has been created
@@ -7281,9 +7322,10 @@ NOTICE:  graph "VLE" has been dropped
 (1 row)
 
 SELECT * FROM drop_graph('case_statement', true);
-NOTICE:  drop cascades to 2 other objects
+NOTICE:  drop cascades to 3 other objects
 DETAIL:  drop cascades to table case_statement._ag_label_vertex
 drop cascades to table case_statement._ag_label_edge
+drop cascades to table case_statement.connected_to
 NOTICE:  graph "case_statement" has been dropped
  drop_graph 
 ------------

diff --git a/regress/sql/expr.sql b/regress/sql/expr.sql
@@ -2637,12 +2637,10 @@ $$) AS (i agtype);
 
 --CASE
 SELECT create_graph('case_statement');
-SELECT * FROM cypher('case_statement', $$CREATE ({i: 1, j: null})$$) AS (result agtype);
-SELECT * FROM cypher('case_statement', $$CREATE ({i: 'a', j: 'b'})$$) AS (result agtype);
-SELECT * FROM cypher('case_statement', $$CREATE ({i: 0, j: 1})$$) AS (result agtype);
-SELECT * FROM cypher('case_statement', $$CREATE ({i: true, j: false})$$) AS (result agtype);
-SELECT * FROM cypher('case_statement', $$CREATE ({i: [], j: [0,1,2]})$$) AS (result agtype);
-SELECT * FROM cypher('case_statement', $$CREATE ({i: {}, j: {i:1}})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 1, i: 1, j: null})-[:connected_to {id: 1, k:0}]->({id: 2, i: 'a', j: 'b'})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 3, i: 0, j: 1})-[:connected_to {id: 2, k:1}]->({id: 4, i: true, j: false})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 5, i: [], j: [0,1,2]})$$) AS (result agtype);
+SELECT * FROM cypher('case_statement', $$CREATE ({id: 6, i: {}, j: {i:1}})$$) AS (result agtype);
 
 --standalone case & edge cases
 --base case
@@ -2688,6 +2686,39 @@ SELECT * FROM cypher('case_statement', $$
 	END
 $$ ) AS (j agtype, case_statement agtype);
 
+--CASE agtype_vertex WHEN value THEN result END
+SELECT * FROM cypher('case_statement', $$
+  MATCH (n)
+  RETURN CASE n
+    WHEN null THEN 'should not return me'
+    WHEN 'agtype_string' THEN 'wrong'
+    WHEN n THEN n
+    ELSE 'no n'
+  END
+$$ ) AS (case_statement agtype);
+
+--CASE with match and edges
+SELECT * FROM cypher('case_statement', $$
+  MATCH (n)-[e]->(m)
+  RETURN CASE
+    WHEN null THEN 'should not return me'
+    WHEN n.i = 1 THEN n
+    WHEN n.i = 0 THEN m
+    ELSE 'none'
+  END
+$$ ) AS (case_statement agtype);
+
+SELECT * FROM cypher('case_statement', $$
+  MATCH (n)-[e]->(m)
+  RETURN CASE
+    WHEN null THEN 'should not return me'
+    WHEN e.k = 1 THEN e
+    WHEN e.k = 0 THEN e
+    ELSE 'none'
+  END
+$$ ) AS (case_statement agtype);
+
+
 -- RETURN * and (u)--(v) optional forms
 SELECT create_graph('opt_forms');
 SELECT * FROM cypher('opt_forms', $$CREATE ({i:1})-[:KNOWS]->({i:2})<-[:KNOWS]-({i:3})$$)AS (result agtype);