Question

我很担心PHPUnit在插入fixtures 之前总是运行TRUNCATE而没有首先设置外键检查：

Syntax error or access violation: 1701 Cannot truncate a table referenced in a foreign key constraint

基本上，PHPUnit尝试在插入fixture之前截断表。如何告诉SET FOREIGN_KEY_CHECKS=0;？

Answer 1

我找到了答案。我最后通过扩展一个类来覆盖一些方法。

<?php

/**
 * Disables foreign key checks temporarily.
 */
class TruncateOperation extends \PHPUnit_Extensions_Database_Operation_Truncate
{
    public function execute(\PHPUnit_Extensions_Database_DB_IDatabaseConnection $connection, \PHPUnit_Extensions_Database_DataSet_IDataSet $dataSet)
    {
        $connection->getConnection()->query("SET foreign_key_checks = 0");
        parent::execute($connection, $dataSet);
        $connection->getConnection()->query("SET foreign_key_checks = 1");
    }
}

然后使用示例：

class FooTest extends \PHPUnit_Extensions_Database_TestCase
{
    public function getSetUpOperation()
    {
        $cascadeTruncates = true; // If you want cascading truncates, false otherwise. If unsure choose false.

        return new \PHPUnit_Extensions_Database_Operation_Composite(array(
            new TruncateOperation($cascadeTruncates),
            \PHPUnit_Extensions_Database_Operation_Factory::INSERT()
        ));
    }
}

所以我实际上禁用了外键检查并在设置时将其设置回来。显然你应该创建一个具有这个功能的基类，而不是扩展它而不是PHPUnit的TestCase。

Answer 2

或者，您可以通过删除所有记录然后重新设置自动增量计数器来模拟截断。

首先，您必须创建新的数据库操作类，以处理重置表的自动增量值。

/**
 * Resets all AUTO_INCREMENT counters on all tables in a dataset.
 * @see PHPUnit_Extensions_Database_Operation_IDatabaseOperation
 */
class ResetAutoincrementOperation implements PHPUnit_Extensions_Database_Operation_IDatabaseOperation
{

    /* 
     * @see PHPUnit_Extensions_Database_Operation_IDatabaseOperation::execute()
     */
    public function execute(PHPUnit_Extensions_Database_DB_IDatabaseConnection $connection, 
            PHPUnit_Extensions_Database_DataSet_IDataSet $dataSet)
    {
        foreach ($dataSet->getReverseIterator() as $table) {
            $query = "ALTER TABLE {$connection->quoteSchemaObject($table->getTableMetaData()->getTableName())}"
                . " AUTO_INCREMENT = 1
            ";

            try {
                $connection->getConnection()->query($query);
            } catch (PDOException $e) {
                throw new PHPUnit_Extensions_Database_Operation_Exception('RESET_AUTOINCREMENT', 
                        $query, array(), $table, $e->getMessage());
            }
        }
    }
}

现在覆盖getSetUpOperation()和getTearDownOperation()方法，如上所述。

class FooTest extends PHPUnit_Extensions_Database_TestCase
{
    /**
     * @see PHPUnit_Extensions_Database_TestCase::getTearDownOperation()
     */
    protected function getTearDownOperation ()
    {
        // Clean up after ourselves
        return new PHPUnit_Extensions_Database_Operation_Composite(array(
            PHPUnit_Extensions_Database_Operation_Factory::DELETE_ALL(), // 1. delete all records from table
            new ResetAutoincrementOperation() // 2. reset auto increment value
        ));
    }

    /**
     * @see PHPUnit_Extensions_Database_TestCase::getSetUpOperation ()
     */
    protected function getSetUpOperation ()
    {
        return new PHPUnit_Extensions_Database_Operation_Composite(array(
                PHPUnit_Extensions_Database_Operation_Factory::DELETE_ALL(), // 1. delete all records from table
                new ResetAutoincrementOperation(), // 2. reset auto increment value
                PHPUnit_Extensions_Database_Operation_Factory::INSERT() // 3. insert new records
        ));
    }
}

使用MySQL 5.5.24和PHPUnit 3.6.10

为我工作

Answer 3

\DB::statement('SET FOREIGN_KEY_CHECKS=0;');

PHPUnit和MySQL截断错误

3 个答案: