public function testUpsert()
 {
     $this->connection->expects($this->once())->method('insert');
     $builder = new Builder($this->connection);
     $builder->upsert(['uniq' => 1, 'non_uniq' => 1], 'uniq');
 }
 public function testSchemaBuilder()
 {
     $this->assertInstanceOf(Schema\PostgresBuilder::class, $this->connection->getSchemaBuilder());
 }