closeToVector function
Returns a matcher which checks if the argument is a vector within distance
epsilon of point (x, y). For example:
expect(scale, closeToVector(2, -2));
expect(position, closeToVector(120, 150, epsilon: 1e-10));
Implementation
Matcher closeToVector(num x, num y, {double epsilon = 1e-15}) {
return _IsCloseTo(Vector2(x.toDouble(), y.toDouble()), epsilon);
}