[gtk/path-ops: 18/25] curve: Add another intersection test

[Matthias Clasen <matthiasc src gnome org>]

commit ee9dc0ed54fe41281ee7f26399ce1534cb49989f
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Mar 27 19:11:57 2022 -0400

    curve: Add another intersection test

 testsuite/gsk/curve.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
---
diff --git a/testsuite/gsk/curve.c b/testsuite/gsk/curve.c
index 5b6106e377..709057b14f 100644
--- a/testsuite/gsk/curve.c
+++ b/testsuite/gsk/curve.c
@@ -348,6 +348,40 @@ test_line_line_end_intersection (void)
   g_assert_true (graphene_point_near (&p, &GRAPHENE_POINT_INIT (10, 100), 0.0001));
 }
 
+static void
+test_line_line_none_intersection (void)
+{
+  GskCurve c1, c2;
+  graphene_point_t p1[2], p2[2];
+  float t1, t2;
+  graphene_point_t p;
+  int n;
+
+  graphene_point_init (&p1[0], 0, 0);
+  graphene_point_init (&p1[1], 10, 0);
+  graphene_point_init (&p2[0], 20, 0);
+  graphene_point_init (&p2[1], 30, 0);
+
+  gsk_curve_init (&c1, gsk_pathop_encode (GSK_PATH_LINE, p1));
+  gsk_curve_init (&c2, gsk_pathop_encode (GSK_PATH_LINE, p2));
+
+  n = gsk_curve_intersect (&c1, &c2, &t1, &t2, &p, 1);
+
+  g_assert_cmpint (n, ==, 0);
+
+  graphene_point_init (&p1[0], 247.103424, 95.7965317);
+  graphene_point_init (&p1[1], 205.463974, 266.758484);
+  graphene_point_init (&p2[0], 183.735962, 355.968689);
+  graphene_point_init (&p2[1], 121.553253, 611.27655);
+
+  gsk_curve_init (&c1, gsk_pathop_encode (GSK_PATH_LINE, p1));
+  gsk_curve_init (&c2, gsk_pathop_encode (GSK_PATH_LINE, p2));
+
+  n = gsk_curve_intersect (&c1, &c2, &t1, &t2, &p, 1);
+
+  g_assert_cmpint (n, ==, 0);
+}
+
 static void
 test_line_curve_intersection (void)
 {
@@ -820,6 +854,7 @@ main (int argc, char *argv[])
   g_test_add_func ("/curve/decompose", test_curve_decompose);
   g_test_add_func ("/curve/decompose-curve", test_curve_decompose_curve);
   g_test_add_func ("/curve/intersection/line-line", test_line_line_intersection);
+  g_test_add_func ("/curve/intersection/line-line-none", test_line_line_none_intersection);
   g_test_add_func ("/curve/intersection/line-line-end", test_line_line_end_intersection);
   g_test_add_func ("/curve/intersection/line-curve", test_line_curve_intersection);
   g_test_add_func ("/curve/intersection/line-curve-end", test_line_curve_end_intersection);