$query->condition('id', $subquery, 'IN');
$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.
$subquery->condition('age', 25, '>');
$this->assertEqual(2, $query_result, 'The query returns the expected number of rows');
}
+ /**
+ * Tests that nested SELECT queries are cloned properly.
+ */
+ 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');
+ }
+
}