Add tests

.gitignore

@@ -16,3 +16,6 @@
 *.exe
 *.out
 *.app
+
+regression.*
+results/

sql/arraymath.sql

@@ -0,0 +1,27 @@
+CREATE EXTENSION arraymath;
+
+SELECT ARRAY[1,2,3,4] @< 4;
+SELECT ARRAY[3.4,5.6,7.6] @* 8.1;
+
+SELECT ARRAY[1,2] @+ ARRAY[3,4];
+SELECT ARRAY[1,2,3,4,5,6] @* ARRAY[1,2];
+SELECT ARRAY[1,1,1,1] @< ARRAY[0,2];
+SELECT ARRAY[1,2,3] @= ARRAY[3,2,1];
+
+WITH a AS (
+SELECT array_agg(a) AS b FROM generate_series(1,100) a
+)
+SELECT b @+ b FROM a;
+
+WITH a AS (
+SELECT array_agg(a) AS b FROM generate_series(1,100) a
+)
+SELECT b @+ ARRAY[0,1] FROM a;
+
+SELECT ARRAY[1,1,1,1] @< ARRAY[1,NULL,1,1];
+
+SELECT ARRAY[NULL] @< ARRAY[NULL];
+
+SELECT ARRAY[[1,2,3],[1,2]] @+ 1;
+
+SELECT ARRAY[]::integer[] @< ARRAY[NULL]::integer[];