From 865f66cba77c3402e732d127a6f5edbfc02b31dc Mon Sep 17 00:00:00 2001
From: Molly Lloyd <molly@mapbox.com>
Date: Mon, 1 Oct 2018 13:00:25 -0400
Subject: [test] add test checking that unclipped tiles are not used by
 ClipIDGenerator

---
 test/algorithm/generate_clip_ids.test.cpp | 41 +++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

diff --git a/test/algorithm/generate_clip_ids.test.cpp b/test/algorithm/generate_clip_ids.test.cpp
index 9dc86305af..f01c2da80a 100644
--- a/test/algorithm/generate_clip_ids.test.cpp
+++ b/test/algorithm/generate_clip_ids.test.cpp
@@ -335,6 +335,47 @@ TEST(GenerateClipIDs, MultipleSources) {
               clipIDs);
 }
 
+TEST(GenerateClipIDs, SomeUnclippedTiles) {
+    std::vector<Renderable> renderables1{
+        Renderable { UnwrappedTileID { 7, 36, 49 }, {}, true, true },
+        Renderable { UnwrappedTileID { 7, 36, 48 }, {}, true, true },
+        Renderable { UnwrappedTileID { 7, 35, 48 }, {}, true, false },
+        Renderable { UnwrappedTileID { 7, 35, 49 }, {}, true, false },
+        Renderable { UnwrappedTileID { 7, 37, 48 }, {}, true, false },
+        Renderable { UnwrappedTileID { 7, 37, 49 }, {}, true, false }
+    };
+    std::vector<Renderable> renderables2{
+        Renderable { UnwrappedTileID { 7, 36, 49 }, {}, true, true },
+        Renderable { UnwrappedTileID { 7, 36, 48 }, {}, true, true }
+    };
+
+    algorithm::ClipIDGenerator generator;
+    generator.update<Renderable>({ renderables1.begin(), renderables1.end() });
+    generator.update<Renderable>({ renderables2.begin(), renderables2.end() });
+    EXPECT_EQ(decltype(renderables1)({
+                Renderable { UnwrappedTileID { 7, 36, 49 }, ClipID {"00000011","00000010"} },
+                Renderable { UnwrappedTileID { 7, 36, 48 }, ClipID {"00000011","00000001"} },
+                Renderable { UnwrappedTileID { 7, 35, 48 }, ClipID {"00000000","00000000"} },
+                Renderable { UnwrappedTileID { 7, 35, 49 }, ClipID {"00000000","00000000"} },
+                Renderable { UnwrappedTileID { 7, 37, 48 }, ClipID {"00000000","00000000"} },
+                Renderable { UnwrappedTileID { 7, 37, 49 }, ClipID {"00000000","00000000"} }
+              }),
+              renderables1);
+    EXPECT_EQ(decltype(renderables2)({
+                Renderable { UnwrappedTileID { 7, 36, 49 }, ClipID {"00000011","00000010"} },
+                Renderable { UnwrappedTileID { 7, 36, 48 }, ClipID {"00000011","00000001"} }
+              }),
+              renderables2);
+
+    const auto clipIDs = generator.getClipIDs();
+
+    EXPECT_EQ(decltype(clipIDs)({
+                { UnwrappedTileID { 7, 36, 48 }, ClipID {"00000011","00000001"} },
+                { UnwrappedTileID { 7, 36, 49 }, ClipID {"00000011","00000010"} }
+              }),
+              clipIDs);
+}
+
 TEST(GenerateClipIDs, DuplicateIDs) {
     std::vector<Renderable> renderables1{
         Renderable{ UnwrappedTileID{ 2, 0, 0 }, {} },
-- 
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