public async Task OneCloserOther()
{
/*
*
|<------15------>|
|<---10--->|
|<---10--->|
* o-----(----)-----o
*
*/
// taken 2 closed cells with 0 speed.
var universe = new Universe();
var cell = new Cell(universe);
var one = new CellPart(universe, cell)
{
X = 500, Y = 100, _Mass = MassFromRadius(10)
};
var other = new CellPart(universe, cell)
{
X = 515, Y = 100, _Mass = MassFromRadius(10)
};
var initialXdistance = Math.Abs(one.X - other.X);
cell.Add(one);
cell.Add(other);
// After Tic
await one.Tic(0);
var finalXdistance1 = Math.Abs(one.X - other.X);
await other.Tic(0);
var finalXdistance2 = Math.Abs(one.X - other.X);
// Distance should increase
Assert.True(ElementsHelper.Collides(one, other));
Assert.True(finalXdistance1 > initialXdistance);
Assert.True(finalXdistance2 > finalXdistance1);
}