1 files changed, 103 insertions, 0 deletions
diff --git a/test/pc/e2e/analyzer/video/multi_head_queue_test.cc b/test/pc/e2e/analyzer/video/multi_head_queue_test.cc
new file mode 100644
index 0000000000..3a4ab6cdbb
--- /dev/null
+++ b/test/pc/e2e/analyzer/video/multi_head_queue_test.cc
@@ -0,0 +1,103 @@
+/*
+ *  Copyright (c) 2020 The WebRTC 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 in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "test/pc/e2e/analyzer/video/multi_head_queue.h"
+#include "absl/types/optional.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace webrtc_pc_e2e {
+namespace {
+
+TEST(MultiHeadQueueTest, GetOnEmpty) {
+  MultiHeadQueue<int> queue = MultiHeadQueue<int>(10);
+  EXPECT_TRUE(queue.IsEmpty(0));
+  for (int i = 0; i < 10; ++i) {
+    EXPECT_FALSE(queue.PopFront(i).has_value());
+    EXPECT_FALSE(queue.Front(i).has_value());
+  }
+}
+
+TEST(MultiHeadQueueTest, SingleHeadOneAddOneRemove) {
+  MultiHeadQueue<int> queue = MultiHeadQueue<int>(1);
+  queue.PushBack(1);
+  EXPECT_EQ(queue.size(), 1lu);
+  EXPECT_TRUE(queue.Front(0).has_value());
+  EXPECT_EQ(queue.Front(0).value(), 1);
+  absl::optional<int> value = queue.PopFront(0);
+  EXPECT_TRUE(value.has_value());
+  EXPECT_EQ(value.value(), 1);
+  EXPECT_EQ(queue.size(), 0lu);
+  EXPECT_TRUE(queue.IsEmpty(0));
+}
+
+TEST(MultiHeadQueueTest, SingleHead) {
+  MultiHeadQueue<size_t> queue = MultiHeadQueue<size_t>(1);
+  for (size_t i = 0; i < 10; ++i) {
+    queue.PushBack(i);
+    EXPECT_EQ(queue.size(), i + 1);
+  }
+  for (size_t i = 0; i < 10; ++i) {
+    absl::optional<size_t> value = queue.PopFront(0);
+    EXPECT_EQ(queue.size(), 10 - i - 1);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(value.value(), i);
+  }
+}
+
+TEST(MultiHeadQueueTest, ThreeHeadsAddAllRemoveAllPerHead) {
+  MultiHeadQueue<size_t> queue = MultiHeadQueue<size_t>(3);
+  for (size_t i = 0; i < 10; ++i) {
+    queue.PushBack(i);
+    EXPECT_EQ(queue.size(), i + 1);
+  }
+  for (size_t i = 0; i < 10; ++i) {
+    absl::optional<size_t> value = queue.PopFront(0);
+    EXPECT_EQ(queue.size(), 10lu);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(value.value(), i);
+  }
+  for (size_t i = 0; i < 10; ++i) {
+    absl::optional<size_t> value = queue.PopFront(1);
+    EXPECT_EQ(queue.size(), 10lu);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(value.value(), i);
+  }
+  for (size_t i = 0; i < 10; ++i) {
+    absl::optional<size_t> value = queue.PopFront(2);
+    EXPECT_EQ(queue.size(), 10 - i - 1);
+    ASSERT_TRUE(value.has_value());
+    EXPECT_EQ(value.value(), i);
+  }
+}
+
+TEST(MultiHeadQueueTest, ThreeHeadsAddAllRemoveAll) {
+  MultiHeadQueue<size_t> queue = MultiHeadQueue<size_t>(3);
+  for (size_t i = 0; i < 10; ++i) {
+    queue.PushBack(i);
+    EXPECT_EQ(queue.size(), i + 1);
+  }
+  for (size_t i = 0; i < 10; ++i) {
+    absl::optional<size_t> value1 = queue.PopFront(0);
+    absl::optional<size_t> value2 = queue.PopFront(1);
+    absl::optional<size_t> value3 = queue.PopFront(2);
+    EXPECT_EQ(queue.size(), 10 - i - 1);
+    ASSERT_TRUE(value1.has_value());
+    ASSERT_TRUE(value2.has_value());
+    ASSERT_TRUE(value3.has_value());
+    EXPECT_EQ(value1.value(), i);
+    EXPECT_EQ(value2.value(), i);
+    EXPECT_EQ(value3.value(), i);
+  }
+}
+
+}  // namespace
+}  // namespace webrtc_pc_e2e
+}  // namespace webrtc