@cfware/fixture-run-directory 
Base class for building daemons within a fixture run directory.
import path from 'path';
import {FixtureRunDirectory} from '@cfware/fixture-run-directory';
const fixtures = path.resolve('fixtures');
const instance0 = new FixtureRunDirectory({instanceID: 'instance0', fixtures});
console.log(instance0.instanceID);
// => instance0
console.log(instance0.fixtureDirectory);
// => $CWD/fixtures
console.log(instance0.fixturePath('dir', 'file'));
// => $CWD/fixtures/dir/file
console.log(instance0.runDirectory);
// => $CWD/fixtures/instances/instance0
console.log(instance0.runPath('dir', 'file'));
// => $CWD/fixtures/instances/instance0/dir/file
const instance1 = new FixtureRunDirectory({instanceID: 'instance1'});
console.log(instance1.runDirectory);
// => $CWD/fixtures/instances/instance1new FixtureRunDirectory({fixturePath, instanceID})
fixturePath defaults to process.resolve(process.cwd(), 'fixtures'). The value
for process.cwd() is taken when this module is loaded.
instanceID must be provided and be a valid filesystem directory name.