public function testGetNoPrimaryKey()
 {
     $column1 = $this->getColumnMock('id');
     $column2 = $this->getColumnMock('title');
     $column3 = $this->getColumnMock('isbn');
     $table = new Table();
     $table->setIdMethod('none');
     $table->addColumn($column1);
     $table->addColumn($column2);
     $table->addColumn($column3);
     $this->assertCount(0, $table->getPrimaryKey());
     $this->assertFalse($table->hasAutoIncrementPrimaryKey());
     $this->assertNull($table->getAutoIncrementPrimaryKey());
     $this->assertFalse($table->hasPrimaryKey());
     $this->assertFalse($table->hasCompositePrimaryKey());
     $this->assertNull($table->getFirstPrimaryKeyColumn());
 }