// Helper function to test any non-empty rectangle
private static void testInterior(Rectangle r) {
assertTrue(r.interior(r.center()));
assertFalse(r.interior(r.lowerRight()));
assertFalse(r.interior(r.upperLeft()));
assertFalse(r.interior(r.upperLeft().offset(0, 1)));
assertFalse(r.interior(r.lowerLeft().offset(0, -1)));
assertFalse(r.interior(r.upperRight().offset(1, 0)));
assertFalse(r.interior(r.lowerRight().offset(1, 1)));
assertTrue(r.interior(r.lowerLeft().offset(r.width() / 4, r.height() / 10)));
}
// Helper function for any rectangle.
// Expects the lower left coordinates (llx,lly)
// and upper-right coordinates (urx, ury),
// even if that's not how the rectangle is
// internally represented.
private static void testGeometry(Rectangle r, double llx, double lly, double urx, double ury) {
// Sanity-check the inputs
assertTrue(llx <= urx);
assertTrue(lly <= ury);
// Check the corners
assertTrue(r.lowerLeft().getX() == llx);
assertTrue(r.lowerLeft().getY() == lly);
assertTrue(r.upperRight().getX() == urx);
assertTrue(r.upperRight().getY() == ury);
assertTrue(r.lowerRight().getX() == urx);
assertTrue(r.lowerRight().getY() == lly);
assertTrue(r.upperLeft().getX() == llx);
assertTrue(r.upperLeft().getY() == ury);
// Check the center
assertTrue(r.center().getX() == (llx + urx) / 2.0);
assertTrue(r.center().getY() == (lly + ury) / 2.0);
// Check the width
assertTrue(r.width() == (urx - llx));
assertTrue(r.height() == (ury - lly));
}