Test GROUP BY clauses.

File

drupal-7.x/modules/simpletest/tests/database_test.test, line 2018

Class

DatabaseSelectComplexTestCase

Test more complex select statements.

Code

function testGroupBy() {
  $query = db_select('test_task', 't');
  $count_field = $query->addExpression('COUNT(task)', 'num');
  $task_field = $query->addField('t', 'task');
  $query->orderBy($count_field);
  $query->groupBy($task_field);
  $result = $query->execute();

  $num_records = 0;
  $last_count = 0;
  $records = array();
  foreach ($result as $record) {
    $num_records++;
    $this->assertTrue($record->$count_field >= $last_count, 'Results returned in correct order.');
    $last_count = $record->$count_field;
    $records[$record->$task_field] = $record->$count_field;
  }

  $correct_results = array(
    'eat' => 1,
    'sleep' => 2,
    'code' => 1,
    'found new band' => 1,
    'perform at superbowl' => 1,
  );

  foreach ($correct_results as $task => $count) {
    $this->assertEqual($records[$task], $count, format_string("Correct number of '@task' records found.", array('@task' => $task)));
  }

  $this->assertEqual($num_records, 6, 'Returned the correct number of total rows.');
}