function SelectCloneTest::testNestedQueryCloning

Tests that nested SELECT queries are cloned properly.

File

core/tests/Drupal/KernelTests/Core/Database/SelectCloneTest.php, line 44

Class

SelectCloneTest

Tests cloning Select queries.

Namespace

Code

public function testNestedQueryCloning() {
    $sub_query = $this->connection
        ->select('test', 't');
    $sub_query->addField('t', 'id', 'id');
    $sub_query->condition('age', 28, '<');
    $query = $this->connection
        ->select($sub_query, 't');
    $clone = clone $query;
    // Cloned query should have a different unique identifier.
    $this->assertNotEquals($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->assertEquals(3, $clone_result, 'The cloned query returns the expected number of rows');
    $this->assertEquals(2, $query_result, 'The query returns the expected number of rows');
}