[PATCH 1/5] drm/tests: Test drm_rect_intersect()

[Arthur Grillo]

Insert test for the drm_rect_intersect() function, it also create a
helper for comparing drm_rects more easily.

Signed-off-by: Arthur Grillo <arthurgri...@riseup.net>
---
 drivers/gpu/drm/tests/drm_rect_test.c | 30 +++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_rect_test.c 
b/drivers/gpu/drm/tests/drm_rect_test.c
index e9809ea32696..f700984f70a8 100644
--- a/drivers/gpu/drm/tests/drm_rect_test.c
+++ b/drivers/gpu/drm/tests/drm_rect_test.c
@@ -9,6 +9,15 @@
 
 #include <drm/drm_rect.h>
 
+static void drm_rect_compare(struct kunit *test, const struct drm_rect *r,
+                            const struct drm_rect *expected)
+{
+       KUNIT_EXPECT_EQ(test, r->x1, expected->x1);
+       KUNIT_EXPECT_EQ(test, r->y1, expected->y1);
+       KUNIT_EXPECT_EQ(test, drm_rect_width(r), drm_rect_width(expected));
+       KUNIT_EXPECT_EQ(test, drm_rect_height(r), drm_rect_height(expected));
+}
+
 static void drm_test_rect_clip_scaled_div_by_zero(struct kunit *test)
 {
        struct drm_rect src, dst, clip;
@@ -196,11 +205,32 @@ static void 
drm_test_rect_clip_scaled_signed_vs_unsigned(struct kunit *test)
        KUNIT_EXPECT_FALSE_MSG(test, drm_rect_visible(&src), "Source should not 
be visible\n");
 }
 
+static void drm_test_rect_intersect(struct kunit *test)
+{
+       struct drm_rect r1, r2;
+       bool visible;
+
+       drm_rect_init(&r1, 0, 0, 2, 2);
+       drm_rect_init(&r2, 1, 1, 2, 2);
+
+       visible = drm_rect_intersect(&r1, &r2);
+
+       KUNIT_EXPECT_TRUE_MSG(test, visible, "Interserction should be a visible 
rect");
+       drm_rect_compare(test, &r1, &DRM_RECT_INIT(1, 1, 1, 1));
+
+       drm_rect_init(&r1, 0, 0, 1, 1);
+
+       visible = drm_rect_intersect(&r1, &r2);
+
+       KUNIT_EXPECT_FALSE_MSG(test, visible, "Interserction should not be a 
visible rect");
+}
+
 static struct kunit_case drm_rect_tests[] = {
        KUNIT_CASE(drm_test_rect_clip_scaled_div_by_zero),
        KUNIT_CASE(drm_test_rect_clip_scaled_not_clipped),
        KUNIT_CASE(drm_test_rect_clip_scaled_clipped),
        KUNIT_CASE(drm_test_rect_clip_scaled_signed_vs_unsigned),
+       KUNIT_CASE(drm_test_rect_intersect),
        { }
 };
 
-- 
2.39.2