@Test
public void canCalculateTheDistanceBetweenTwoLocationsOnTheSameContinent() {
Coordinates centerBellInMontreal = Coordinates.locatedAt(45.4959755, -73.5693904);
Coordinates yankeeStadiumInNewYork = Coordinates.locatedAt(40.8295818, -73.9261455);
Length distance = centerBellInMontreal.getDistanceTo(yankeeStadiumInNewYork);
assertThat(distance.toKilometers()).isWithin(0.5).of(519.23);
}
@Test
public void givenTwoFarLocationsButVeryLargeRange_ShouldBeInRange() {
Coordinates manhattan = Coordinates.locatedAt(40.7791547, -73.9654464);
Coordinates harvardUniversity = Coordinates.locatedAt(42.3770068, -71.1188488);
Length range = Length.fromMiles(200);
boolean inRange = harvardUniversity.isInRange(manhattan, range);
assertThat(inRange).isTrue();
}
@Test
public void givenTwoFarLocationsButTooShortRange_ShouldBeInRange() {
Coordinates manhattan = Coordinates.locatedAt(40.7791547, -73.9654464);
Coordinates harvardUniversity = Coordinates.locatedAt(42.3770068, -71.1188488);
Length range = Length.fromMiles(50);
boolean inRange = manhattan.isInRange(harvardUniversity, range);
assertThat(inRange).isFalse();
}
@Test
public void givenTwoVeryNearLocationsAndVeryShortRange_ShouldBeInRange() {
Coordinates googlePlex = Coordinates.locatedAt(37.4218047, -122.0838097);
Coordinates googleSoccerField = Coordinates.locatedAt(37.424242, -122.0874509);
Length range = Length.fromMiles(0.30);
boolean inRange = googlePlex.isInRange(googleSoccerField, range);
assertThat(inRange).isTrue();
}
@Test
public void canCalculateTheDistanceBetweenTwoLocationsOnDifferentContinents() {
// Example found on http://janmatuschek.de/LatitudeLongitudeBoundingCoordinates
Coordinates statueOfLiberty = Coordinates.locatedAt(40.6892, -74.0444);
Coordinates eiffelTower = Coordinates.locatedAt(48.8583, 2.2945);
Length distance = statueOfLiberty.getDistanceTo(eiffelTower);
assertThat(distance.toKilometers()).isWithin(0.5).of(5_837);
}
@Test
public void givenLocationInAngle_CanRetrieveTheLongitude() {
Angle latitude = Angle.fromDegrees(39.54);
Angle longitude = Angle.fromDegrees(-54.76);
Coordinates location = Coordinates.locatedAt(latitude, longitude);
assertThat(location.getLongitude()).isEqualTo(longitude);
}
@Test
public void givenNumericLocation_CanRetrieveTheLatitude() {
Coordinates location = Coordinates.locatedAt(45.34, -73.45);
assertThat(location.getLatitude()).isEqualTo(Angle.fromDegrees(45.34));
}
