Class structure for WordPress unit tests where constants need to be tested

constant-tests.php

class Tests_For_Stupid_Constants extends WP_UnitTestCase {

	/**
	 * Do not preserve global state between test methods.
	 *
	 * @var bool
	 */
	protected $preserveGlobalState = false;

	/**
	 * Run each test method in a separate, isolated process.
	 *
	 * This ensures constants are properly set and tested.
	 *
	 * @var bool
	 */
	protected $runTestInSeparateProcess = true;
  
  function test_this_in_isolated_process() {
  }
}