function DatabaseSelectCloneTest::testNestedQueryCloning

Tests that nested SELECT queries are cloned properly.

File

modules/simpletest/tests/database_test.test, line 348

Class

DatabaseSelectCloneTest

Test cloning Select queries.

Code

public function testNestedQueryCloning() {
  $sub_query = db_select('test', 't');
  $sub_query->addField('t', 'id', 'id');
  $sub_query->condition('age', 28, '<');
  $query = db_select($sub_query, 't');
  $clone = clone $query;
  // Cloned query should have a different unique identifier.
  $this->assertNotEqual($query->uniqueIdentifier(), $clone->uniqueIdentifier());
  // Cloned query should not be altered by the following modification
  // happening on original query.
  $sub_query->condition('age', 25, '>');
  $clone_result = $clone->countQuery()
    ->execute()
    ->fetchField();
  $query_result = $query->countQuery()
    ->execute()
    ->fetchField();
  // Make sure the cloned query has not been modified.
  $this->assertEqual(3, $clone_result, 'The cloned query returns the expected number of rows');
  $this->assertEqual(2, $query_result, 'The query returns the expected number of rows');
}