function SessionTestCase::testSessionWrite

Test that sessions are only saved when necessary.

File

modules/simpletest/tests/session.test, line 186

Class

SessionTestCase

@file Provides SimpleTests for core session handling functionality.

Code

function testSessionWrite() {
    $user = $this->drupalCreateUser(array(
        'access content',
    ));
    $this->drupalLogin($user);
    $sql = 'SELECT u.access, s.timestamp FROM {users} u INNER JOIN {sessions} s ON u.uid = s.uid WHERE u.uid = :uid';
    $times1 = db_query($sql, array(
        ':uid' => $user->uid,
    ))
        ->fetchObject();
    // Before every request we sleep one second to make sure that if the session
    // is saved, its timestamp will change.
    // Modify the session.
    sleep(1);
    $this->drupalGet('session-test/set/foo');
    $times2 = db_query($sql, array(
        ':uid' => $user->uid,
    ))
        ->fetchObject();
    $this->assertEqual($times2->access, $times1->access, 'Users table was not updated.');
    $this->assertNotEqual($times2->timestamp, $times1->timestamp, 'Sessions table was updated.');
    // Write the same value again, i.e. do not modify the session.
    sleep(1);
    $this->drupalGet('session-test/set/foo');
    $times3 = db_query($sql, array(
        ':uid' => $user->uid,
    ))
        ->fetchObject();
    $this->assertEqual($times3->access, $times1->access, 'Users table was not updated.');
    $this->assertEqual($times3->timestamp, $times2->timestamp, 'Sessions table was not updated.');
    // Do not change the session.
    sleep(1);
    $this->drupalGet('');
    $times4 = db_query($sql, array(
        ':uid' => $user->uid,
    ))
        ->fetchObject();
    $this->assertEqual($times4->access, $times3->access, 'Users table was not updated.');
    $this->assertEqual($times4->timestamp, $times3->timestamp, 'Sessions table was not updated.');
    // Force updating of users and sessions table once per second.
    variable_set('session_write_interval', 0);
    $this->drupalGet('');
    $times5 = db_query($sql, array(
        ':uid' => $user->uid,
    ))
        ->fetchObject();
    $this->assertNotEqual($times5->access, $times4->access, 'Users table was updated.');
    $this->assertNotEqual($times5->timestamp, $times4->timestamp, 'Sessions table was updated.');
}