Try new PG combinator in tests

mon/dsl_pgs.js

@@ -313,7 +313,7 @@ function murmur3(s)
     let hash = 0x12345678;
     for (let i = 0; i < s.length; i++)
     {
-        hash ^= s[i].charCodeAt(i);
+        hash ^= s.charCodeAt(i);
         hash = (hash*0x5bd1e995) & 0xFFFFFFFF;
         hash ^= (hash >> 15);
     }

mon/test-parse-dsl.js

@@ -1,4 +1,4 @@
-const { parse_level_indexes, parse_pg_dsl } = require('./dsl_pgs.js');
+const { random_custom_combinations, index_tree, parse_level_indexes, parse_pg_dsl } = require('./dsl_pgs.js');
 
 function check(result, expected)
 {
@@ -92,4 +92,13 @@ check(
     ]
 );
 
+check(
+    Object.keys(random_custom_combinations(index_tree([
+        { id: '1', size: 1, level: 'osd' },
+        { id: '2', size: 2, level: 'osd' },
+        { id: '3', size: 3, level: 'osd' }
+    ]), parse_level_indexes({ osd: '12' }), 10000)).sort(),
+    [ 'pg_1_2', 'pg_1_3', 'pg_2_3' ]
+);
+
 console.log('OK');