Add table sort test in Postgres (#46)

tests/Migrations/Postgres/ComplexAtomizerTest.php

@@ -14,4 +14,38 @@
 class ComplexAtomizerTest extends \Cycle\Migrations\Tests\ComplexAtomizerTest
 {
     public const DRIVER = 'postgres';
+
+    public function testTableSorting(): void
+    {
+        $this->migrator->configure();
+
+        $schema = $this->schema('messages');
+        $schema->primary('id');
+        $schema->integer('user_id');
+        $schema->integer('thread_id');
+        $schema->foreignKey(['thread_id'])->references('threads', ['id']);
+        $schema->foreignKey(['user_id'])->references('users', ['id']);
+
+        $schema1 = $this->schema('users');
+        $schema1->primary('id');
+
+        $schema2 = $this->schema('threads');
+        $schema2->primary('id');
+
+        $this->atomize('migration1', [$schema, $schema1, $schema2]);
+        $this->migrator->run();
+
+        $this->assertTrue($this->db->hasTable('messages'));
+        $this->assertTrue($this->db->table('messages')->hasForeignKey(['thread_id']));
+        $this->assertTrue($this->db->table('messages')->hasForeignKey(['user_id']));
+
+        $this->assertTrue($this->db->hasTable('users'));
+        $this->assertTrue($this->db->hasTable('threads'));
+
+        $this->migrator->rollback();
+
+        $this->assertFalse($this->db->hasTable('messages'));
+        $this->assertFalse($this->db->hasTable('users'));
+        $this->assertFalse($this->db->hasTable('threads'));
+    }
 }