@coorpacademy/progression-engine/es/reducers/test/variables.js

import _set from "lodash/fp/set";
import test from 'ava';
import { getConfig } from '../../config';
import variables from '../variables';
import { answerAction, moveAction } from './fixtures/actions';
import { learner } from './fixtures/engines';
import { stateForFirstSlide } from './fixtures/states';
const config = getConfig(learner);
test('should extract instructions from answerAction and apply them to state', t => {
  const state = stateForFirstSlide;
  const answerActionWithInstructions = _set('payload.instructions', [{
    value: 1,
    type: 'set',
    field: 'A'
  }, {
    value: 3,
    type: 'add',
    field: 'lives'
  }, {
    value: 2,
    type: 'set',
    field: 'stars'
  }, {
    value: false,
    type: 'set',
    field: 'reverse'
  }], answerAction);
  const newState = variables(config)(state, answerActionWithInstructions);
  t.is(newState.variables.A, 1);
  t.is(newState.lives, 4);
  t.is(newState.stars, 2);
  t.is(newState.variables.reverse, false);
});
test('should extract instructions from moveAction and apply them to state', t => {
  const state = stateForFirstSlide;
  const moveActionWithInstructions = _set('payload.instructions', [{
    value: 0,
    type: 'set',
    field: 'foo'
  }, {
    value: 10,
    type: 'set',
    field: 'bar'
  }], moveAction);
  const newState = variables(config)(state, moveActionWithInstructions);
  t.is(newState.variables.foo, 0);
  t.is(newState.variables.bar, 10);
});
test('should not update variables if there are no instructions into moveAction', t => {
  const state = stateForFirstSlide;
  const newState = variables(config)(state, moveAction);
  t.deepEqual(newState.variables, {});
});
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