1 files changed, 50 insertions, 0 deletions
diff --git a/test/algorithm/update_renderables.test.cpp b/test/algorithm/update_renderables.test.cpp
index 7d6a0fcb13..e142758f29 100644
--- a/test/algorithm/update_renderables.test.cpp
+++ b/test/algorithm/update_renderables.test.cpp
@@ -1259,3 +1259,53 @@ TEST(UpdateRenderables, LoadRequiredIfIdealTileCantBeFound) {
               }),
               log);
 }
+
+// Tests overzooming a 0/0/0 tile to zoom level 4, when the maxzoom is 2.
+TEST(UpdateRenderables, LoadOverscaledMaxZoomTile) {
+    ActionLog log;
+    MockSource source;
+    auto getTileData = getTileDataFn(log, source.dataTiles);
+    auto createTileData = createTileDataFn(log, source.dataTiles);
+    auto retainTileData = retainTileDataFn(log);
+    auto renderTile = renderTileFn(log);
+
+    source.zoomRange.max = 2;
+    source.idealTiles.emplace(UnwrappedTileID{ 2, 0, 0 });
+
+    auto tile_4_2_0_0 = source.createTileData(OverscaledTileID{ 4, 0, { 2, 0, 0 } });
+    tile_4_2_0_0->renderable = false;
+    tile_4_2_0_0->triedOptional = true;
+    tile_4_2_0_0->loaded = true;
+
+    auto tile_3_2_0_0 = source.createTileData(OverscaledTileID{ 3, 0, { 2, 0, 0 } });
+    tile_3_2_0_0->renderable = false;
+    tile_3_2_0_0->triedOptional = true;
+    tile_3_2_0_0->loaded = true;
+
+    auto tile_2_2_0_0 = source.createTileData(OverscaledTileID{ 2, 0, { 2, 0, 0 } });
+    tile_2_2_0_0->renderable = false;
+    tile_2_2_0_0->triedOptional = true;
+    tile_2_2_0_0->loaded = true;
+
+    // Tile level 1 won't be overscaled.
+    auto tile_1_1_0_0 = source.createTileData(OverscaledTileID{ 1, 0, { 1, 0, 0 } });
+    tile_1_1_0_0->renderable = true;
+    tile_1_1_0_0->triedOptional = true;
+    tile_1_1_0_0->loaded = true;
+
+    algorithm::updateRenderables(getTileData, createTileData, retainTileData, renderTile,
+                                 source.idealTiles, source.zoomRange, 4);
+    EXPECT_EQ(ActionLog({
+                  GetTileDataAction{ { 4, 0, { 2, 0, 0 } }, Found },
+                  RetainTileDataAction{ { 4, 0, { 2, 0, 0 } }, TileNecessity::Required },
+                  GetTileDataAction{ { 5, 0, { 2, 0, 0 } }, NotFound },
+                  GetTileDataAction{ { 3, 0, { 2, 0, 0 } }, Found },
+                  RetainTileDataAction{ { 3, 0, { 2, 0, 0 } }, TileNecessity::Required },
+                  GetTileDataAction{ { 2, 0, { 2, 0, 0 } }, Found },
+                  RetainTileDataAction{ { 2, 0, { 2, 0, 0 } }, TileNecessity::Required },
+                  GetTileDataAction{ { 1, 0, { 1, 0, 0 } }, Found },
+                  RetainTileDataAction{ { 1, 0, { 1, 0, 0 } }, TileNecessity::Required },
+                  RenderTileAction{ { 1, 0, 0 }, *tile_1_1_0_0 },
+              }),
+              log);
+}