[stacking] guard tests for quadrants

src/tests/blit.cpp

@@ -111,6 +111,7 @@ TEST_CASE("Blitting") {
   // original version https://github.com/dankamongmen/notcurses/issues/1354
   SUBCASE("QuadblitterMax") {
     if(notcurses_canutf8(nc_)){
+      if(nc_->tcache.quadrants){
         uint32_t p2x2[4];
         uint32_t* ptl = &p2x2[0];
         ncpixel_set_a(ptl, 0xff);
@@ -154,6 +155,7 @@ TEST_CASE("Blitting") {
         free(egc);
       }
     }
+  }
 
   CHECK(!notcurses_stop(nc_));
 }

src/tests/stacking.cpp

@@ -102,6 +102,7 @@ TEST_CASE("Stacking") {
   }
 
   SUBCASE("StackedQuadHalves") {
+    if(nc_->tcache.quadrants){
       struct ncplane_options opts = {
         0, 0, 1, 1, nullptr, "top", nullptr, 0, 0, 0,
       };
@@ -137,8 +138,10 @@ TEST_CASE("Stacking") {
       CHECK(0x00ff00 == channels_bg_rgb(channels));
       ncplane_destroy(top);
     }
+  }
 
   SUBCASE("StackedQuadCrossed") {
+    if(nc_->tcache.quadrants){
       ncplane_erase(n_);
       notcurses_refresh(nc_, nullptr, nullptr);
       struct ncplane_options opts = {
@@ -176,6 +179,7 @@ TEST_CASE("Stacking") {
       CHECK(0xffffff == channels_bg_rgb(channels));
       ncplane_destroy(top);
     }
+  }
 
   // common teardown
   CHECK(0 == notcurses_stop(nc_));