Reland "Move smoothing filter to common audio".

webrtc/base/exp_filter_unittest.cc

Index: webrtc/base/exp_filter_unittest.cc
diff --git a/webrtc/base/exp_filter_unittest.cc b/webrtc/base/exp_filter_unittest.cc
deleted file mode 100644
index f0278081138edd9005275c313065a20ef4e94bbe..0000000000000000000000000000000000000000
--- a/webrtc/base/exp_filter_unittest.cc
+++ /dev/null
@@ -1,71 +0,0 @@
-/*
- *  Copyright 2014 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 <math.h>
-
-#include "webrtc/base/gunit.h"
-#include "webrtc/base/exp_filter.h"
-
-namespace rtc {
-
-TEST(ExpFilterTest, FirstTimeOutputEqualInput) {
-  // No max value defined.
-  ExpFilter filter = ExpFilter(0.9f);
-  filter.Apply(100.0f, 10.0f);
-
-  // First time, first argument no effect.
-  double value = 10.0f;
-  EXPECT_FLOAT_EQ(value, filter.filtered());
-}
-
-TEST(ExpFilterTest, SecondTime) {
-  double value;
-
-  ExpFilter filter = ExpFilter(0.9f);
-  filter.Apply(100.0f, 10.0f);
-
-  // First time, first argument no effect.
-  value = 10.0f;
-
-  filter.Apply(10.0f, 20.0f);
-  double alpha = pow(0.9f, 10.0f);
-  value = alpha * value + (1.0f - alpha) * 20.0f;
-  EXPECT_FLOAT_EQ(value, filter.filtered());
-}
-
-TEST(ExpFilterTest, Reset) {
-  ExpFilter filter = ExpFilter(0.9f);
-  filter.Apply(100.0f, 10.0f);
-
-  filter.Reset(0.8f);
-  filter.Apply(100.0f, 1.0f);
-
-  // Become first time after a reset.
-  double value = 1.0f;
-  EXPECT_FLOAT_EQ(value, filter.filtered());
-}
-
-TEST(ExpfilterTest, OutputLimitedByMax) {
-  double value;
-
-  // Max value defined.
-  ExpFilter filter = ExpFilter(0.9f, 1.0f);
-  filter.Apply(100.0f, 10.0f);
-
-  // Limited to max value.
-  value = 1.0f;
-  EXPECT_EQ(value, filter.filtered());
-
-  filter.Apply(1.0f, 0.0f);
-  value = 0.9f * value;
-  EXPECT_FLOAT_EQ(value, filter.filtered());
-}
-
-}  // namespace rtc