74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
// Copyright 2019 The MediaPipe Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "mediapipe/examples/desktop/autoflip/quality/piecewise_linear_function.h"
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#include <stddef.h>
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#include <memory>
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#include "mediapipe/framework/port/gtest.h"
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#include "mediapipe/framework/port/status.h"
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namespace {
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using mediapipe::autoflip::PiecewiseLinearFunction;
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// It should be OK to pass a spec that's out of order as it gets sorted.
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TEST(PiecewiseLinearFunctionTest, ReordersSpec) {
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PiecewiseLinearFunction f;
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// This defines the line y = x between 0 and 5
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f.AddPoint(0, 0);
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f.AddPoint(1, 1);
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f.AddPoint(2, 2);
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f.AddPoint(3, 3);
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f.AddPoint(5, 5);
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// Should be 0 as -1 is less than the smallest x value in the spec so it
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// should saturate.
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ASSERT_EQ(0, f.Evaluate(-1));
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// These shoud all be on the line y = x
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ASSERT_EQ(0, f.Evaluate(0));
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ASSERT_EQ(0.5, f.Evaluate(0.5));
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ASSERT_EQ(4.5, f.Evaluate(4.5));
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ASSERT_EQ(5, f.Evaluate(5));
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// Saturating on the high end.
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ASSERT_EQ(5, f.Evaluate(6));
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}
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TEST(PiecewiseLinearFunctionTest, TestAddPoints) {
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PiecewiseLinearFunction function;
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function.AddPoint(0.0, 0.0);
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function.AddPoint(1.0, 1.0);
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EXPECT_DOUBLE_EQ(0.0, function.Evaluate(-1.0));
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EXPECT_DOUBLE_EQ(0.0, function.Evaluate(0.0));
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EXPECT_DOUBLE_EQ(0.25, function.Evaluate(0.25));
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}
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TEST(PiecewiseLinearFunctionTest, AddPointsDiscontinuous) {
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PiecewiseLinearFunction function;
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function.AddPoint(-1.0, 0.0);
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function.AddPoint(0.0, 0.0);
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function.AddPoint(0.0, 1.0);
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function.AddPoint(1.0, 1.0);
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EXPECT_DOUBLE_EQ(0.0, function.Evaluate(-1.0));
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EXPECT_DOUBLE_EQ(0.0, function.Evaluate(0.0));
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EXPECT_DOUBLE_EQ(1.0, function.Evaluate(1e-12));
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EXPECT_DOUBLE_EQ(1.0, function.Evaluate(3.14));
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}
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} // namespace
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