public function SelectComplexTest::testGroupBy in Drupal 9

Same name and namespace in other branches

1. 8 core/tests/Drupal/KernelTests/Core/Database/SelectComplexTest.php \Drupal\KernelTests\Core\Database\SelectComplexTest::testGroupBy()

Tests GROUP BY clauses.

File

core/tests/Drupal/KernelTests/Core/Database/SelectComplexTest.php, line 79

Class

SelectComplexTest

Tests the Select query builder with more complex queries.

Namespace

Drupal\KernelTests\Core\Database

Code

public function testGroupBy() {
  $query = $this->connection
    ->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 = [];

  // Verify that the results are returned in the correct order.
  foreach ($result as $record) {
    $num_records++;
    $this
      ->assertGreaterThanOrEqual($last_count, $record->{$count_field});
    $last_count = $record->{$count_field};
    $records[$record->{$task_field}] = $record->{$count_field};
  }
  $correct_results = [
    'eat' => 1,
    'sleep' => 2,
    'code' => 1,
    'found new band' => 1,
    'perform at superbowl' => 1,
  ];
  foreach ($correct_results as $task => $count) {
    $this
      ->assertEquals($count, $records[$task], new FormattableMarkup("Correct number of '@task' records found.", [
      '@task' => $task,
    ]));
  }
  $this
    ->assertEquals(6, $num_records, 'Returned the correct number of total rows.');
}