[gtk/wip/otte/lottie: 67/83] testuite: Add tests for gsk_curve_get_tangent()
- From: Benjamin Otte <otte src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gtk/wip/otte/lottie: 67/83] testuite: Add tests for gsk_curve_get_tangent()
- Date: Sat, 19 Dec 2020 05:42:11 +0000 (UTC)
commit 37588ecae07687f57b3057b7fda7824f433fd7f3
Author: Benjamin Otte <otte redhat com>
Date: Tue Dec 8 21:23:58 2020 +0100
testuite: Add tests for gsk_curve_get_tangent()
testsuite/gsk/curve.c | 39 +++++++++++++++++++++++++++++++++++----
1 file changed, 35 insertions(+), 4 deletions(-)
---
diff --git a/testsuite/gsk/curve.c b/testsuite/gsk/curve.c
index 5e83a1b806..2fd899aa0b 100644
--- a/testsuite/gsk/curve.c
+++ b/testsuite/gsk/curve.c
@@ -61,6 +61,30 @@ init_random_curve (GskCurve *curve)
}
}
+static void
+test_curve_tangents (void)
+{
+ for (int i = 0; i < 100; i++)
+ {
+ GskCurve c;
+ graphene_vec2_t vec, exact;
+
+ init_random_curve (&c);
+
+ gsk_curve_get_tangent (&c, 0, &vec);
+ g_assert_cmpfloat_with_epsilon (graphene_vec2_length (&vec), 1.0f, 0.00001);
+ gsk_curve_get_start_tangent (&c, &exact);
+ g_assert_cmpfloat_with_epsilon (graphene_vec2_length (&exact), 1.0f, 0.00001);
+ g_assert_true (graphene_vec2_near (&vec, &exact, 0.05));
+
+ gsk_curve_get_tangent (&c, 1, &vec);
+ g_assert_cmpfloat_with_epsilon (graphene_vec2_length (&vec), 1.0f, 0.00001);
+ gsk_curve_get_end_tangent (&c, &exact);
+ g_assert_cmpfloat_with_epsilon (graphene_vec2_length (&exact), 1.0f, 0.00001);
+ g_assert_true (graphene_vec2_near (&vec, &exact, 0.05));
+ }
+}
+
static void
test_curve_points (void)
{
@@ -71,10 +95,16 @@ test_curve_points (void)
init_random_curve (&c);
- gsk_curve_eval (&c, 0, &p, NULL);
- g_assert_true (graphene_point_near (gsk_curve_get_start_point (&c), &p, 0.01));
- gsk_curve_eval (&c, 1, &p, NULL);
- g_assert_true (graphene_point_near (gsk_curve_get_end_point (&c), &p, 0.01));
+ /* We can assert equality here because evaluating the polynomials with 0
+ * has no effect on accuracy.
+ */
+ gsk_curve_get_point (&c, 0, &p);
+ g_assert_true (graphene_point_equal (gsk_curve_get_start_point (&c), &p));
+ /* But here we evaluate the polynomials with 1 which gives the highest possible
+ * accuracy error. So we'll just be generous here.
+ */
+ gsk_curve_get_point (&c, 1, &p);
+ g_assert_true (graphene_point_near (gsk_curve_get_end_point (&c), &p, 0.05));
}
}
@@ -84,6 +114,7 @@ main (int argc, char *argv[])
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/curve/points", test_curve_points);
+ g_test_add_func ("/curve/tangents", test_curve_tangents);
return g_test_run ();
}
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