cofounderella/test/math_test.dart

import 'package:cofounderella/utils/math.dart';
import 'package:flutter_test/flutter_test.dart';


void main() {
  group('Distance Calculation', () {
    test('returns correct distance between Berlin and Paris', () {
      // Example coordinates for Berlin and Paris
      double berlinLat = 52.516216;
      double berlinLon =  13.377646;
      double parisLat = 48.858119;
      double parisLon = 2.294483;

      // Calculated distance between Berlin and Paris
      double distance = calculateDistance(berlinLat, berlinLon, parisLat, parisLon);

      // Expected approximate distance in kilometers
      double expectedDistance = 879.1;

      // Comparison of both distances
      expect(distance, closeTo(expectedDistance, 1.0));
    });

    test('returns correct distance between same coordinates', () {
      double lat = 49.469548;
      double lon = 8.48243;

      double distance = calculateDistance(lat, lon, lat, lon);

      expect(distance, equals(0.0));
    });

    test('returns correct distance for long distances', () {
      // Example coordinates for New York and Sydney
      double newYorkLat = 40.7128;
      double newYorkLon = -74.0060;
      double sydneyLat = -33.8688;
      double sydneyLon = 151.2093;

      double distance = calculateDistance(newYorkLat, newYorkLon, sydneyLat, sydneyLon);
      double expectedDistance = 15988; // in kilometers

      // Comparison of the calculated and expected distance
      // with a tolerance of 10 due to the enormous distance
      expect(distance, closeTo(expectedDistance, 10.0));
    });
  });



  group('Coordinate Conversion', () {
    test('converts positive latitude correctly', () {
      double decimalValue = 40.7128;
      String result = convertDecimalToDMS(decimalValue, isLatitude: true);
      expect(result, '40° 42\' 46.08" N');
    });

    test('converts negative latitude correctly', () {
      double decimalValue = -40.7128;
      String result = convertDecimalToDMS(decimalValue, isLatitude: true);
      expect(result, '40° 42\' 46.08" S');
    });

    test('converts positive longitude correctly', () {
      double decimalValue = 74.0060;
      String result = convertDecimalToDMS(decimalValue, isLatitude: false);
      expect(result, '74° 0\' 21.60" E');
    });

    test('converts negative longitude correctly', () {
      double decimalValue = -74.0060;
      String result = convertDecimalToDMS(decimalValue, isLatitude: false);
      expect(result, '74° 0\' 21.60" W');
    });

    test('handles zero latitude correctly', () {
      double decimalValue = 0.0;
      String result = convertDecimalToDMS(decimalValue, isLatitude: true);
      expect(result, '0° 0\' 0.00" N');
    });

    test('handles zero longitude correctly', () {
      double decimalValue = 0.0;
      String result = convertDecimalToDMS(decimalValue, isLatitude: false);
      expect(result, '0° 0\' 0.00" E');
    });
  });
}