@Test
  public void GetMinTranslation_LineAndCircleAreDisjoint_ReturnsNull() {
    Circle circle = new Circle(0, 0, 5);
    Line line = new Line(6, 0, 6, 5);

    assertNull(overlapper.getMinTranslation(line, circle));
  }
  @Test
  public void GetMinTranslation_LineAndCircleAreTouchingButDontOverlap_ReturnsNull() {
    Circle circle = new Circle(0, 0, 5);
    Line line = new Line(5, -5, 5, 5);

    assertNull(overlapper.getMinTranslation(line, circle));
  }
  @Test
  public void GetMinTranslation_ClosestVertexTranslation() {
    Circle circle = new Circle(-4, 0, 5);
    Line line = new Line(0, 0, 4, 0);

    assertEquals(
        new Translation(new Vector2f(-1, 0), 1f), overlapper.getMinTranslation(line, circle));
  }