1 files changed, 46 insertions, 0 deletions
diff --git a/chromium/ui/base/prediction/one_euro_filter_unittests.cc b/chromium/ui/base/prediction/one_euro_filter_unittests.cc
new file mode 100644
index 00000000000..3e74f032fa0
--- /dev/null
+++ b/chromium/ui/base/prediction/one_euro_filter_unittests.cc
@@ -0,0 +1,46 @@
+// Copyright 2019 The Chromium 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 "base/rand_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/base/prediction/input_filter_unittest_helpers.h"
+#include "ui/base/prediction/one_euro_filter.h"
+#include "ui/base/prediction/prediction_unittest_helpers.h"
+
+namespace ui {
+namespace test {
+
+class OneEuroFilterTest : public InputFilterTest {
+ public:
+  explicit OneEuroFilterTest() {}
+
+  void SetUp() override { filter_ = std::make_unique<OneEuroFilter>(1, 1); }
+
+  DISALLOW_COPY_AND_ASSIGN(OneEuroFilterTest);
+};
+
+TEST_F(OneEuroFilterTest, TestClone) {
+  TestCloneFilter();
+}
+
+TEST_F(OneEuroFilterTest, TestReset) {
+  TestResetFilter();
+}
+
+// Check if sending values between 0 and 1 keeps filtered values between 0 and 1
+TEST_F(OneEuroFilterTest, filteringValues) {
+  base::TimeTicks ts = PredictionUnittestHelpers::GetStaticTimeStampForTests();
+  gfx::PointF point;
+  for (int i = 0; i < 100; i++) {
+    point.SetPoint(base::RandDouble(), base::RandDouble());
+    EXPECT_TRUE(filter_->Filter(ts, &point));
+    EXPECT_LT(point.x(), 1.0);
+    EXPECT_LT(point.y(), 1.0);
+    EXPECT_GT(point.x(), 0.0);
+    EXPECT_GT(point.y(), 0.0);
+  }
+}
+
+}  // namespace test
+}  // namespace ui