Exclude "guest" schmea in schema dumper (#1208)

Co-authored-by: Jesse vonBergen <[email protected]>

Author: jvon1904

Diff for: lib/active_record/connection_adapters/sqlserver/schema_statements.rb

@@ -400,7 +400,7 @@ def schema_names
             FROM sys.schemas
             WHERE
             name NOT LIKE 'db_%' AND
-            name NOT IN ('INFORMATION_SCHEMA', 'sys')
+            name NOT IN ('INFORMATION_SCHEMA', 'sys', 'guest')
           SQL
 
           query_values(sql, "SCHEMA")

Diff for: test/cases/schema_dumper_test_sqlserver.rb

@@ -167,6 +167,10 @@ class SchemaDumperTestSQLServer < ActiveRecord::TestCase
 
     # Only generate non-default schemas. Default schema is 'dbo'.
     assert_not_includes generated_schema, 'create_schema "dbo"'
+    assert_not_includes generated_schema, 'create_schema "db_owner"'
+    assert_not_includes generated_schema, 'create_schema "INFORMATION_SCHEMA"'
+    assert_not_includes generated_schema, 'create_schema "sys"'
+    assert_not_includes generated_schema, 'create_schema "guest"'
     assert_includes generated_schema, 'create_schema "test"'
     assert_includes generated_schema, 'create_schema "test2"'