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commit 0c06ae1dc5dbb4877ef90c79122ca88f6425b465
Author: Loïc Bartoletti <loic.bartoletti at oslandia.com>
Date:   Mon Jun 8 15:30:47 2026 +0200

    test(sfcgal): replace flaky alpha-shape 2-component test with integer input

diff --git a/sfcgal/regress/alphashape_components.sql b/sfcgal/regress/alphashape_components.sql
index 38e896ffd..6baff0256 100644
--- a/sfcgal/regress/alphashape_components.sql
+++ b/sfcgal/regress/alphashape_components.sql
@@ -1,4 +1,23 @@
+-- CG_OptimalAlphaShape with nb_components=2, allow_holes=false
+-- Two rectangular-frame clusters with integer coordinates.
+-- Integer-only input avoids floating-point borderline cases and produces
+-- identical results regardless of compiler or CGAL minor version.
 SELECT 'CG_Optimalalphashape_2components',
-       ST_AsText(CG_OptimalAlphaShape('MULTIPOINT((10.1 0.2),(8.1 0.1),(6.0 0.0),(4.2 0.3),(2.5 1.0),(1.2 2.3),(0.4 4.0),(0.1 6.1),(0.3 8.2),(1.1 10.1),(2.6 11.2),(4.1 11.9),(6.2 12.1),(8.3 11.8),(10.2 11.1),(9.1 9.9),(7.6 9.8),(6.1 9.9),(4.8 9.2),(3.8 8.0),(3.6 6.2),(3.7 4.1),(4.6 2.9),(6.0 2.3),(7.8 2.2),(9.2 2.4),(40.3 0.4),(40.1 3.1),(39.8 6.2),(40.4 9.0),(40.2 12.3),(40.5 15.2),(41.9 15.6),(43.1 15.3),(54.3 15.2),(55.8 15.0),(55.6 12.1),(55.9 9.2),(55.5 6.0),(55.7 3.3),(55.4 0.5),(52.6 0.1),(49.8 -0.2),(46.9 2.8),(44.2 0.2),(42.1 0.3),(43.0 3.8),(43.3 7.1),(43.1 10.4),(52.9 10.6),(52.7 7.3),(52.8 4.1))', allow_holes => false, nb_components => 2));
+       ST_AsText(CG_OptimalAlphaShape('MULTIPOINT(
+  (0 0),(1 0),(2 0),(3 0),(4 0),(5 0),
+  (0 1),(5 1),
+  (0 2),(5 2),
+  (0 3),(1 3),(2 3),(3 3),(4 3),(5 3),
+  (0 4),(5 4),
+  (0 5),(5 5),
+  (0 6),(1 6),(2 6),(3 6),(4 6),(5 6),
+  (30 0),(31 0),(32 0),(33 0),(34 0),(35 0),
+  (30 1),(35 1),
+  (30 2),(35 2),
+  (30 3),(31 3),(32 3),(33 3),(34 3),(35 3),
+  (30 4),(35 4),
+  (30 5),(35 5),
+  (30 6),(31 6),(32 6),(33 6),(34 6),(35 6)
+)', allow_holes => false, nb_components => 2));
 SELECT 'CG_OptimalAlphaShape_hole_2components',
        ST_AsText(CG_OptimalAlphaShape('MULTIPOINT((0 0),(0 1),(0 2),(0 3),(0 4),(0 5),(0 6),(0 7),(0 8),(0 9),(1 10),(2 10),(3 10),(4 10),(4.5 9.5),(5 9),(5.5 8.5),(6 8),(6 7),(6 6),(5.5 5.5),(5 5),(4 5),(3 5),(2 5),(1 5),(1 4),(2 4),(3 4),(4 4),(4.5 3.5),(5 3),(6 2),(6 1),(5.5 0.5),(5 0),(4 0),(3 0),(2 0),(1 0),(0.5 0),(0.5 1),(0.5 2),(0.5 3),(0.5 4),(0.5 5),(0.5 6),(0.5 7),(0.5 8),(0.5 9),(0.5 10),(1 9.5),(2 9.5),(3 9.5),(4 9.5),(4.5 9),(5 8.5),(5.5 8),(5.5 7),(5.5 6),(5.5 6.5),(5 5.5),(4 5.5),(3 5.5),(2 5.5),(1 5.5),(1.5 4.5),(2.5 4.5),(3.5 4.5),(4 4.5),(4.5 4),(5 3.5),(5.5 3),(5.5 2),(5.5 1),(5 0.5),(4 0.5),(3 0.5),(2 0.5),(1 0.5),(12 0),(12 1),(12 2),(12 3),(12 4),(12 5),(12 6),(12 7),(12 8),(12 9),(12 10),(13 10),(14 10),(15 10),(16 10),(16.5 9.5),(17 9),(17.5 8.5),(18 8),(18 7),(18 6),(17.5 5.5),(17 5),(16 5),(15 5),(14 5),(13 5),(12.5 0),(12.5 1),(12.5 2),(12.5 3),(12.5 4),(12.5 5),(12.5 6),(12.5 7),(12.5 8),(12.5 9),(12.5 10),(13 9.5),(14 9.5),(15 9.5),(16 9.5),(16.5 9),(17
  8.5),(17.5 8),(17.5 7),(17.5 6),(17.5 6.5),(17 5.5),(16 5.5),(15 5.5),(14 5.5),(13 5.5),(13 1),(13 2),(13 3),(13 4),(17.5 7.4),(18 7.3),(5.1 2.5),(5.8 2.5),(0.03 9.82),(0.23 10))', allow_holes => true, nb_components => 2));
diff --git a/sfcgal/regress/alphashape_components_expected b/sfcgal/regress/alphashape_components_expected
index a30a4ad59..b6c81889e 100644
--- a/sfcgal/regress/alphashape_components_expected
+++ b/sfcgal/regress/alphashape_components_expected
@@ -1,2 +1,2 @@
-CG_Optimalalphashape_2components|MULTIPOLYGON(((8.3 11.8,6.2 12.1,4.1 11.9,2.6 11.2,1.1 10.1,0.3 8.2,0.1 6.1,0.4 4,1.2 2.3,2.5 1,4.2 0.3,6 0,8.1 0.1,10.1 0.2,9.2 2.4,7.8 2.2,6 2.3,3.6 6.2,7.6 9.8,9.1 9.9,10.2 11.1,8.3 11.8)),((55.6 12.1,55.8 15,54.3 15.2,52.9 10.6,52.7 7.3,52.8 4.1,46.9 2.8,43.3 7.1,43.1 10.4,43.1 15.3,41.9 15.6,40.5 15.2,40.2 12.3,40.4 9,39.8 6.2,40.1 3.1,40.3 0.4,42.1 0.3,44.2 0.2,49.8 -0.2,52.6 0.1,55.4 0.5,55.7 3.3,55.5 6,55.9 9.2,55.6 12.1)))
+CG_Optimalalphashape_2components|MULTIPOLYGON(((4 6,3 6,2 6,1 6,0 6,0 5,0 4,0 3,0 2,0 1,0 0,1 0,2 0,3 0,4 0,5 0,5 1,5 2,5 3,5 4,5 5,5 6,4 6)),((34 6,33 6,32 6,31 6,30 6,30 5,30 4,30 3,30 2,30 1,30 0,31 0,32 0,33 0,34 0,35 0,35 1,35 2,35 3,35 4,35 5,35 6,34 6)))
 CG_OptimalAlphaShape_hole_2components|MULTIPOLYGON(((5.5 8.5,5 9,4.5 9.5,4 10,3 10,2 10,1 10,0.5 10,0.23 10,0.03 9.82,0 9,0 8,0 7,0 6,0 5,0 4,0 3,0 2,0 1,0 0,0.5 0,1 0,2 0,3 0,4 0,5 0,5.5 0.5,6 1,6 2,5.8 2.5,5.5 3,5 3.5,4.5 4,4 4.5,5 5,5.5 5.5,6 6,6 7,6 8,5.5 8.5),(0.5 2,0.5 3,1 4,2 4,3 4,4 4,4.5 3.5,5 3,5.1 2.5,5.5 2,5.5 1,5 0.5,4 0.5,3 0.5,2 0.5,1 0.5,0.5 1,0.5 2),(0.5 7,0.5 8,0.5 9,1 9.5,2 9.5,3 9.5,4 9.5,4.5 9,5 8.5,5.5 8,5.5 7,5.5 6.5,5.5 6,5 5.5,4 5.5,3 5.5,2 5.5,1 5.5,0.5 6,0.5 7)),((17.5 8.5,17 9,16.5 9.5,16 10,15 10,14 10,13 10,12.5 10,12 10,12 9,12 8,12 7,12 6,12 5,12 4,12 3,12 2,12 1,12 0,12.5 0,13 1,13 2,13 3,13 4,13 5,14 5,15 5,16 5,17 5,17.5 5.5,18 6,18 7,18 7.3,18 8,17.5 8.5),(12.5 7,12.5 8,12.5 9,13 9.5,14 9.5,15 9.5,16 9.5,16.5 9,17 8.5,17.5 8,17.5 7.4,17.5 7,17.5 6.5,17.5 6,17 5.5,16 5.5,15 5.5,14 5.5,13 5.5,12.5 6,12.5 7)))

-----------------------------------------------------------------------

Summary of changes:
 sfcgal/regress/alphashape_components.sql      | 21 ++++++++++++++++++++-
 sfcgal/regress/alphashape_components_expected |  2 +-
 2 files changed, 21 insertions(+), 2 deletions(-)


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