1 files changed, 97 insertions, 0 deletions
diff --git a/src/decoder/test/footprint_test.cc b/src/decoder/test/footprint_test.cc
new file mode 100644
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--- /dev/null
+++ b/src/decoder/test/footprint_test.cc
@@ -0,0 +1,97 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "src/decoder/footprint.h"
+
+#include <array>
+#include <tuple>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+namespace astc_codec {
+
+namespace {
+
+TEST(FootprintTest, ParseAstcFootprintString) {
+  using ASTCTestPair = std::pair<std::string, Footprint>;
+  const std::array<ASTCTestPair, Footprint::NumValidFootprints()>
+      valid_footprints {{
+      std::make_pair("4x4", Footprint::Get4x4()),
+      std::make_pair("5x4", Footprint::Get5x4()),
+      std::make_pair("5x5", Footprint::Get5x5()),
+      std::make_pair("6x5", Footprint::Get6x5()),
+      std::make_pair("6x6", Footprint::Get6x6()),
+      std::make_pair("8x5", Footprint::Get8x5()),
+      std::make_pair("8x6", Footprint::Get8x6()),
+      std::make_pair("8x8", Footprint::Get8x8()),
+      std::make_pair("10x5", Footprint::Get10x5()),
+      std::make_pair("10x6", Footprint::Get10x6()),
+      std::make_pair("10x8", Footprint::Get10x8()),
+      std::make_pair("10x10", Footprint::Get10x10()),
+      std::make_pair("12x10", Footprint::Get12x10()),
+      std::make_pair("12x12", Footprint::Get12x12())
+  }};
+
+  for (const auto& test : valid_footprints) {
+    base::Optional<Footprint> footprint = Footprint::Parse(test.first.c_str());
+    EXPECT_TRUE(footprint);
+    EXPECT_EQ(test.second, footprint.value());
+  }
+
+  EXPECT_DEBUG_DEATH(EXPECT_FALSE(Footprint::Parse("")), "");
+  EXPECT_DEBUG_DEATH(EXPECT_FALSE(Footprint::Parse("3")), "");
+  EXPECT_DEBUG_DEATH(EXPECT_FALSE(Footprint::Parse("x")), "");
+  // Validly formed but out-of-bounds dimensions do not assert, otherwise
+  // malformed ASTC files could crash the decoder in debug builds.
+  EXPECT_FALSE(Footprint::Parse("9999999999x10"));
+  EXPECT_DEBUG_DEATH(EXPECT_FALSE(Footprint::Parse("ax8")), "");
+  EXPECT_DEBUG_DEATH(EXPECT_FALSE(Footprint::Parse("2x3x4")), "");
+  EXPECT_DEBUG_DEATH(EXPECT_FALSE(Footprint::Parse("-3x4")), "");
+  EXPECT_FALSE(Footprint::Parse("10x4"));
+}
+
+TEST(FootprintTest, Bitrates) {
+  EXPECT_NEAR(Footprint::Get4x4().Bitrate(), 8.f, 0.01f);
+  EXPECT_NEAR(Footprint::Get5x4().Bitrate(), 6.4f, 0.01f);
+  EXPECT_NEAR(Footprint::Get5x5().Bitrate(), 5.12f, 0.01f);
+  EXPECT_NEAR(Footprint::Get6x5().Bitrate(), 4.27f, 0.01f);
+  EXPECT_NEAR(Footprint::Get6x6().Bitrate(), 3.56f, 0.01f);
+  EXPECT_NEAR(Footprint::Get8x5().Bitrate(), 3.20f, 0.01f);
+  EXPECT_NEAR(Footprint::Get8x6().Bitrate(), 2.67f, 0.01f);
+  EXPECT_NEAR(Footprint::Get8x8().Bitrate(), 2.00f, 0.01f);
+  EXPECT_NEAR(Footprint::Get10x5().Bitrate(), 2.56f, 0.01f);
+  EXPECT_NEAR(Footprint::Get10x6().Bitrate(), 2.13f, 0.01f);
+  EXPECT_NEAR(Footprint::Get10x8().Bitrate(), 1.60f, 0.01f);
+  EXPECT_NEAR(Footprint::Get10x10().Bitrate(), 1.28f, 0.01f);
+  EXPECT_NEAR(Footprint::Get12x10().Bitrate(), 1.07f, 0.01f);
+  EXPECT_NEAR(Footprint::Get12x12().Bitrate(), 0.89f, 0.01f);
+}
+
+TEST(FootprintTest, StorageRequirements) {
+  auto footprint = Footprint::Get10x8();
+  EXPECT_EQ(footprint.Width(), 10);
+  EXPECT_EQ(footprint.Height(), 8);
+
+  // If we have 8x8 blocks, then we have 64*16 = 1024 bytes.
+  EXPECT_EQ(footprint.StorageRequirements(80, 64), 1024);
+
+  // If our block is a little smaller this still counts because we need to
+  // cover a partial block with a fully encoded one.
+  EXPECT_EQ(footprint.StorageRequirements(79, 63), 1024);
+}
+
+}  // namespace
+
+}  // namespace astc_codec