Example of unit testing - Computed Properties

model-test.js

// ================= MODEL FILE

export default DS.Model.extend({
  // attributes
  fields: attr(''),
  values: attr(''),
  types: attr(''),
  options: attr(''),

  // computed
  properties: computed('fields.[]', 'values.[]', function() {
    if(!this.get('fields')) { return []; }
    return this.get('fields').map((item, index) => {
      return ServiceDetailProperty.create({
        name: item,
        value: this.get('values')[index],
        type: this.get('types')[index],
        options: this.get('options')[index]
      });
    });
  }),
});

// ================= END MODEL FILE
// ================= TEST FILE

test('it properly computes #properties', function(assert) {
  const types = ['type1', 'type2'];
  const values = ['value1', 'value2'];
  const fields = ['name1', 'name2'];
  const options = [['1', '2'], ['3', '4']];
  const model = this.subject({ types, values, fields, options });
  assert.equal(model.get('properties').length, 2, 'there are two properties computed');
  assert.equal(
    model.get('properties.firstObject.name'),
    'name1',
    'property have proper name'
  );
  assert.equal(
    model.get('properties.firstObject.value'),
    'value1',
    'property have proper value'
  );
  assert.equal(
    model.get('properties.firstObject.type'),
    'type1',
    'property have proper type'
  );
  assert.deepEqual(
    model.get('properties.firstObject.options'),
    ['1', '2'],
    'property have proper options'
  );
});

// ================= END TEST FILE