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da1023fcc5
I did a bit of Profiling and made the quickselect and median algorithms use the best of option for the respective input size.
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
/*
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* Copyright (c) 2023, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Statistics.h>
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#include <LibTest/TestSuite.h>
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TEST_CASE(Statistics)
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{
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// Setup Test Data
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AK::Statistics<double> odd_number_elements;
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AK::Statistics<double> even_number_elements;
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AK::Statistics<double> odd_number_elements_large;
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AK::Statistics<double> even_number_elements_large;
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odd_number_elements.add(5.0);
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odd_number_elements.add(4.0);
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odd_number_elements.add(3.0);
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odd_number_elements.add(2.0);
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odd_number_elements.add(1.0);
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even_number_elements.add(6.0);
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even_number_elements.add(5.0);
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even_number_elements.add(4.0);
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even_number_elements.add(3.0);
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even_number_elements.add(2.0);
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even_number_elements.add(1.0);
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for (int i = 201; i > 0; i--) {
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odd_number_elements_large.add(i);
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}
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for (int i = 360; i > 0; i--) {
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even_number_elements_large.add(i);
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}
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// Sum
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EXPECT_APPROXIMATE(odd_number_elements.sum(), 15.0);
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EXPECT_APPROXIMATE(even_number_elements.sum(), 21.0);
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// Average
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EXPECT_APPROXIMATE(odd_number_elements.average(), 3.0);
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EXPECT_APPROXIMATE(even_number_elements.average(), 3.5);
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// Min
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EXPECT_APPROXIMATE(odd_number_elements.min(), 1.0);
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EXPECT_APPROXIMATE(even_number_elements.min(), 1.0);
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// Max
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EXPECT_APPROXIMATE(odd_number_elements.max(), 5.0);
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EXPECT_APPROXIMATE(even_number_elements.max(), 6.0);
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// Median
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EXPECT_APPROXIMATE(odd_number_elements.median(), 3.0);
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EXPECT_APPROXIMATE(even_number_elements.median(), 3.5);
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EXPECT_APPROXIMATE(odd_number_elements_large.median(), 101.0);
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EXPECT_APPROXIMATE(even_number_elements_large.median(), 180.5);
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// The expected values for standard deviation and variance were calculated by my school issued scientific calculator
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// Standard Deviation
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EXPECT_APPROXIMATE(odd_number_elements.standard_deviation(), 1.4142135623731);
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EXPECT_APPROXIMATE(even_number_elements.standard_deviation(), 1.7078251276599);
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// Variance
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EXPECT_APPROXIMATE(odd_number_elements.variance(), 2.0);
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EXPECT_APPROXIMATE(even_number_elements.variance(), 2.9166666666667);
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}
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