frontend/test-mocha/common/entity/feature_class_names_test.js

import { assert } from 'chai';

import featureClassNames from '../../../src/common/entity/feature_class_names';

describe('featureClassNames', () => {
  const classNames = {
    1: 'has-feature_a',
    2: 'has-feature_b',
    4: 'has-feature_c',
    8: 'has-feature_d',
  };

  it('Skips null states', () => {
    const stateObj = null;
    assert.strictEqual(
      featureClassNames(stateObj, classNames),
      ''
    );
  });

  it('Matches no features', () => {
    const stateObj = {
      attributes: {
        supported_features: 64,
      },
    };
    assert.strictEqual(
      featureClassNames(stateObj, classNames),
      ''
    );
  });

  it('Matches one feature', () => {
    const stateObj = {
      attributes: {
        supported_features: 72,
      },
    };
    assert.strictEqual(
      featureClassNames(stateObj, classNames),
      'has-feature_d'
    );
  });

  it('Matches two features', () => {
    const stateObj = {
      attributes: {
        supported_features: 73,
      },
    };
    assert.strictEqual(
      featureClassNames(stateObj, classNames),
      'has-feature_a has-feature_d'
    );
  });
});