function SchemaTestCase::testSchema

File

modules/simpletest/tests/schema.test, line 20

Tests for the Database Schema API.

Class

SchemaTestCase

Unit tests for the Schema API.

Code

function testSchema() {
  // Try creating a table.
  $table_specification = array(
    'description' => 'Schema table description.',
    'fields' => array(
      'id' => array(
        'type' => 'int',
        'default' => NULL,
      ),
      'test_field' => array(
        'type' => 'int',
        'not null' => TRUE,
        'description' => 'Schema column description.',
      ),
    ),
  );
  db_create_table('test_table', $table_specification);

  // Assert that the table exists.
  $this->assertTrue(db_table_exists('test_table'), 'The table exists.');

  // Assert that the table comment has been set.
  $this->checkSchemaComment($table_specification['description'], 'test_table');

  // Assert that the column comment has been set.
  $this->checkSchemaComment($table_specification['fields']['test_field']['description'], 'test_table', 'test_field');

  // An insert without a value for the column 'test_table' should fail.
  $this->assertFalse($this->tryInsert(), 'Insert without a default failed.');

  // Add a default value to the column.
  db_field_set_default('test_table', 'test_field', 0);
  // The insert should now succeed.
  $this->assertTrue($this->tryInsert(), 'Insert with a default succeeded.');

  // Remove the default.
  db_field_set_no_default('test_table', 'test_field');
  // The insert should fail again.
  $this->assertFalse($this->tryInsert(), 'Insert without a default failed.');

  // Test for fake index and test for the boolean result of indexExists().
  $index_exists = Database::getConnection()->schema()->indexExists('test_table', 'test_field');
  $this->assertIdentical($index_exists, FALSE, 'Fake index does not exists');
  // Add index.
  db_add_index('test_table', 'test_field', array('test_field'));
  // Test for created index and test for the boolean result of indexExists().
  $index_exists = Database::getConnection()->schema()->indexExists('test_table', 'test_field');
  $this->assertIdentical($index_exists, TRUE, 'Index created.');

  // Rename the table.
  db_rename_table('test_table', 'test_table2');

  // Index should be renamed.
  $index_exists = Database::getConnection()->schema()->indexExists('test_table2', 'test_field');
  $this->assertTrue($index_exists, 'Index was renamed.');

  // We need the default so that we can insert after the rename.
  db_field_set_default('test_table2', 'test_field', 0);
  $this->assertFalse($this->tryInsert(), 'Insert into the old table failed.');
  $this->assertTrue($this->tryInsert('test_table2'), 'Insert into the new table succeeded.');

  // We should have successfully inserted exactly two rows.
  $count = db_query('SELECT COUNT(*) FROM {test_table2}')->fetchField();
  $this->assertEqual($count, 2, 'Two fields were successfully inserted.');

  // Try to drop the table.
  db_drop_table('test_table2');
  $this->assertFalse(db_table_exists('test_table2'), 'The dropped table does not exist.');

  // Recreate the table.
  db_create_table('test_table', $table_specification);
  db_field_set_default('test_table', 'test_field', 0);
  db_add_field('test_table', 'test_serial', array('type' => 'int', 'not null' => TRUE, 'default' => 0, 'description' => 'Added column description.'));

  // Assert that the column comment has been set.
  $this->checkSchemaComment('Added column description.', 'test_table', 'test_serial');

  // Change the new field to a serial column.
  db_change_field('test_table', 'test_serial', 'test_serial', array('type' => 'serial', 'not null' => TRUE, 'description' => 'Changed column description.'), array('primary key' => array('test_serial')));

  // Assert that the column comment has been set.
  $this->checkSchemaComment('Changed column description.', 'test_table', 'test_serial');

  $this->assertTrue($this->tryInsert(), 'Insert with a serial succeeded.');
  $max1 = db_query('SELECT MAX(test_serial) FROM {test_table}')->fetchField();
  $this->assertTrue($this->tryInsert(), 'Insert with a serial succeeded.');
  $max2 = db_query('SELECT MAX(test_serial) FROM {test_table}')->fetchField();
  $this->assertTrue($max2 > $max1, 'The serial is monotone.');

  $count = db_query('SELECT COUNT(*) FROM {test_table}')->fetchField();
  $this->assertEqual($count, 2, 'There were two rows.');
}