"""Tests for parser.py."""

import pytest

from features.utils import parser


def test_parse_feature_empty():
    """Test parsing feature from a empty string fails."""
    with pytest.raises(Exception) as excinfo:
        parser._parse_features_from_yaml('')
    assert 'Yaml content is not valid.' in str(excinfo.value)


def test_parse_feature_from_string():
    """Test parsing feature from a yaml string."""
    features = parser._parse_features_from_yaml("""
        - name: better_ads
          variants:
            minimalist: 0
            control: 1
        - name: background_color
          variants:
            minimalist: 0
            catchy: 0
            control: 0
          force:
            control:
                user_ids: [id1]
                vendor_ids: [7123]
        """)

    assert len(features) == 2

    better_ads = features['better_ads']
    assert better_ads.name == 'better_ads'
    assert len(better_ads.variants) == 2
    assert len(better_ads.force_rules) == 0

    background_color = features['background_color']
    assert len(background_color.variants) == 3
    assert len(background_color.force_rules) == 2


def test_parse_feature_with_duplicate_name():
    """Parse features with duplicate names."""
    with pytest.raises(Exception) as excinfo:
        parser._parse_features_from_yaml("""
            - name: better_ads
              variants:
                minimalist: 0
            - name: better_ads
              variants:
                maximalist: 0
            """)

    assert 'This feature better_ads is already used' in str(excinfo.value)