function SchemaTestCase::testSchema in SimpleTest 7

File

tests/schema.test, line 23

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'), t('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(), t('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(), t('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(), t('Insert without a default failed.'));

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

  // 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(), t('Insert into the old table failed.'));
  $this
    ->assertTrue($this
    ->tryInsert('test_table2'), t('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, t('Two fields were successfully inserted.'));

  // Try to drop the table.
  db_drop_table('test_table2');
  $this
    ->assertFalse(db_table_exists('test_table2'), t('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(), t('Insert with a serial succeeded.'));
  $max1 = db_query('SELECT MAX(test_serial) FROM {test_table}')
    ->fetchField();
  $this
    ->assertTrue($this
    ->tryInsert(), t('Insert with a serial succeeded.'));
  $max2 = db_query('SELECT MAX(test_serial) FROM {test_table}')
    ->fetchField();
  $this
    ->assertTrue($max2 > $max1, t('The serial is monotone.'));
  $count = db_query('SELECT COUNT(*) FROM {test_table}')
    ->fetchField();
  $this
    ->assertEqual($count, 2, t('There were two rows.'));
}