test: Add tiled TIFF test case to simple_all_formats

This is to hit more lines and make codecov happier,
than during recent build of PR #685

test/extension/io/simple_all_formats.cpp

@@ -74,6 +74,18 @@ void test_tiff()
     gil::write_view(tiff_out + "simple_all_format.tif", gil::view(img), gil::tiff_tag());
 }
 
+void test_tiff_tiled()
+{
+    gil::rgba8_image_t img;
+    gil::read_image(tiff_filename, img, gil::tiff_tag());
+
+    fs::create_directories(fs::path(tiff_out));
+    gil::image_write_info<gil::tiff_tag> info;
+    info._is_tiled = true;
+    info._tile_width = info._tile_length = 64; // must be multiples of 16
+    gil::write_view(tiff_out + "simple_all_format.tif", gil::view(img), info);
+}
+
 int main(int argc, char* argv[])
 {
     try
@@ -85,6 +97,7 @@ int main(int argc, char* argv[])
         // TODO: test_raw()
         test_targa();
         test_tiff();
+        test_tiff_tiled();
     }
     catch (std::exception const& e)
     {