lsystem/tests/basictests.js

A module that lets you create L-systems, which will take rules, then use those rules to transform strings into other strings.

var test = require('tape');
var LSystem = require('../index');
var pick = require('lodash.pick');
var systems = require('./fixtures/system-specifications');

systems.forEach(runTest);

function runTest(systemSpec) {
  test(`${systemSpec.name} test`, function systemTest(t) {
    var lsys = LSystem(
      pick(systemSpec, 'initialState', 'rules', 'constants')
    );
    
    systemSpec.expectedStates.forEach(testIteration);

    function testIteration(expectedState, i) {
      t.equal(lsys.getIteration(), 0, `Reports it is on iteration ${i}.`);
      t.equal(
        lsys.getState(), expectedState, `State is correct for iteration ${i}.`
      );
      lsys.advance();
    }

    t.end();
  });
}

// TODO: Stochastic L-system with function-based rules.