function DatabaseSelectTestCase::testUnion

Test that we can UNION multiple Select queries together. This is semantically equal to UNION DISTINCT, so we don't explicity test that.

File

modules/simpletest/tests/database_test.test, line 1546

Database tests.

Class

DatabaseSelectTestCase

Test the SELECT builder.

Code

function testUnion() {
  $query_1 = db_select('test', 't')
    ->fields('t', array('name'))
    ->condition('age', array(27, 28), 'IN');

  $query_2 = db_select('test', 't')
    ->fields('t', array('name'))
    ->condition('age', 28);

  $query_1->union($query_2);

  $names = $query_1->execute()->fetchCol();

  // Ensure we only get 2 records.
  $this->assertEqual(count($names), 2, 'UNION correctly discarded duplicates.');

  $this->assertEqual($names[0], 'George', 'First query returned correct name.');
  $this->assertEqual($names[1], 'Ringo', 'Second query returned correct name.');
}