1 files changed, 53 insertions, 0 deletions
diff --git a/third_party/jpeg-xl/lib/jxl/byte_order_test.cc b/third_party/jpeg-xl/lib/jxl/byte_order_test.cc
new file mode 100644
index 0000000000..17d7ef6643
--- /dev/null
+++ b/third_party/jpeg-xl/lib/jxl/byte_order_test.cc
@@ -0,0 +1,53 @@
+// Copyright (c) the JPEG XL Project Authors. All rights reserved.
+//
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "lib/jxl/base/byte_order.h"
+
+#include "lib/jxl/testing.h"
+
+namespace jxl {
+namespace {
+
+TEST(ByteOrderTest, TestRoundTripBE16) {
+  const uint32_t in = 0x1234;
+  uint8_t buf[2];
+  StoreBE16(in, buf);
+  EXPECT_EQ(in, LoadBE16(buf));
+  EXPECT_NE(in, LoadLE16(buf));
+}
+
+TEST(ByteOrderTest, TestRoundTripLE16) {
+  const uint32_t in = 0x1234;
+  uint8_t buf[2];
+  StoreLE16(in, buf);
+  EXPECT_EQ(in, LoadLE16(buf));
+  EXPECT_NE(in, LoadBE16(buf));
+}
+
+TEST(ByteOrderTest, TestRoundTripBE32) {
+  const uint32_t in = 0xFEDCBA98u;
+  uint8_t buf[4];
+  StoreBE32(in, buf);
+  EXPECT_EQ(in, LoadBE32(buf));
+  EXPECT_NE(in, LoadLE32(buf));
+}
+
+TEST(ByteOrderTest, TestRoundTripLE32) {
+  const uint32_t in = 0xFEDCBA98u;
+  uint8_t buf[4];
+  StoreLE32(in, buf);
+  EXPECT_EQ(in, LoadLE32(buf));
+  EXPECT_NE(in, LoadBE32(buf));
+}
+
+TEST(ByteOrderTest, TestRoundTripLE64) {
+  const uint64_t in = 0xFEDCBA9876543210ull;
+  uint8_t buf[8];
+  StoreLE64(in, buf);
+  EXPECT_EQ(in, LoadLE64(buf));
+}
+
+}  // namespace
+}  // namespace jxl