1 files changed, 107 insertions, 0 deletions
diff --git a/media/mtransport/test/simpletokenbucket_unittest.cpp b/media/mtransport/test/simpletokenbucket_unittest.cpp
new file mode 100644
index 000000000..70c962bb8
--- /dev/null
+++ b/media/mtransport/test/simpletokenbucket_unittest.cpp
@@ -0,0 +1,107 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* Original author: bcampen@mozilla.com */
+
+#include "simpletokenbucket.h"
+
+#define GTEST_HAS_RTTI 0
+#include "gtest/gtest.h"
+#include "gtest_utils.h"
+
+using mozilla::SimpleTokenBucket;
+
+class TestSimpleTokenBucket : public SimpleTokenBucket {
+  public:
+    TestSimpleTokenBucket(size_t bucketSize, size_t tokensPerSecond) :
+      SimpleTokenBucket(bucketSize, tokensPerSecond) {
+    }
+
+    void fastForward(int32_t timeMilliSeconds) {
+      if (timeMilliSeconds >= 0) {
+        last_time_tokens_added_ -= PR_MillisecondsToInterval(timeMilliSeconds);
+      } else {
+        last_time_tokens_added_ += PR_MillisecondsToInterval(-timeMilliSeconds);
+      }
+    }
+};
+
+TEST(SimpleTokenBucketTest, TestConstruct) {
+  TestSimpleTokenBucket b(10, 1);
+}
+
+TEST(SimpleTokenBucketTest, TestGet) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(5U, b.getTokens(5));
+}
+
+TEST(SimpleTokenBucketTest, TestGetAll) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(10U, b.getTokens(10));
+}
+
+TEST(SimpleTokenBucketTest, TestGetInsufficient) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(5U, b.getTokens(5));
+  ASSERT_EQ(5U, b.getTokens(6));
+}
+
+TEST(SimpleTokenBucketTest, TestGetBucketCount) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(10U, b.getTokens(UINT32_MAX));
+  ASSERT_EQ(5U, b.getTokens(5));
+  ASSERT_EQ(5U, b.getTokens(UINT32_MAX));
+}
+
+TEST(SimpleTokenBucketTest, TestTokenRefill) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(5U, b.getTokens(5));
+  b.fastForward(1000);
+  ASSERT_EQ(6U, b.getTokens(6));
+}
+
+TEST(SimpleTokenBucketTest, TestNoTimeWasted) {
+  // Makes sure that when the time elapsed is insufficient to add any
+  // tokens to the bucket, the internal timestamp that is used in this
+  // calculation is not updated (ie; two subsequent 0.5 second elapsed times
+  // counts as a full second)
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(5U, b.getTokens(5));
+  b.fastForward(500);
+  ASSERT_EQ(5U, b.getTokens(6));
+  b.fastForward(500);
+  ASSERT_EQ(6U, b.getTokens(6));
+}
+
+TEST(SimpleTokenBucketTest, TestNegativeTime) {
+  TestSimpleTokenBucket b(10, 1);
+  b.fastForward(-1000);
+  // Make sure we don't end up with an invalid number of tokens, but otherwise
+  // permit anything.
+  ASSERT_GT(11U, b.getTokens(100));
+}
+
+TEST(SimpleTokenBucketTest, TestEmptyBucket) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(10U, b.getTokens(10));
+  ASSERT_EQ(0U, b.getTokens(10));
+}
+
+TEST(SimpleTokenBucketTest, TestEmptyThenFillBucket) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(10U, b.getTokens(10));
+  ASSERT_EQ(0U, b.getTokens(1));
+  b.fastForward(50000);
+  ASSERT_EQ(10U, b.getTokens(10));
+}
+
+TEST(SimpleTokenBucketTest, TestNoOverflow) {
+  TestSimpleTokenBucket b(10, 1);
+  ASSERT_EQ(10U, b.getTokens(10));
+  ASSERT_EQ(0U, b.getTokens(1));
+  b.fastForward(50000);
+  ASSERT_EQ(10U, b.getTokens(11));
+}