public function testSchemaWithOneEntity()
 {
     $this->creator->addEntityClass('ActiveDoctrine\\Tests\\Fixtures\\Articles\\Article');
     $schema = $this->creator->createSchema();
     $this->assertTrue($schema->hasTable('articles'));
     $table = $schema->getTable('articles');
     $this->assertSame(Article::getFields(), array_keys($table->getColumns()));
     $this->assertSame('integer', $table->getColumn('id')->getType()->getName());
     $this->assertSame('datetime', $table->getColumn('created_at')->getType()->getName());
 }