function SelectComplexTest::testGroupBy

Tests GROUP BY clauses.

File

core/tests/Drupal/KernelTests/Core/Database/SelectComplexTest.php, line 78

Class

SelectComplexTest

Tests the Select query builder with more complex queries.

Namespace

Code

public function testGroupBy() : void {
    $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);
    $this->assertMatchesRegularExpression("/ORDER BY .*[^\\w\\s]num[^\\w\\s]/", (string) $query);
    $this->assertMatchesRegularExpression("/GROUP BY .*[^\\w\\s]task[^\\w\\s]/", (string) $query);
    $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], "Correct number of '{$task}' records found.");
    }
    $this->assertEquals(6, $num_records, 'Returned the correct number of total rows.');
}