76 lines
2.1 KiB
C++
76 lines
2.1 KiB
C++
#include "Catch2.h"
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#include "../_TestingUtilities/Testutil.h"
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#include <Eule/Random.h>
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#include <array>
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using namespace Eule;
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// Checks that a random double is never outside the specification, two positive values
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TEST_CASE(__FILE__"/Random_Doublerange_Never_Outside_Specification__pos__pos", "[Random][RandomRange]")
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{
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// Test 1000 random integers
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for (std::size_t i = 0; i < 1000; i++)
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{
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double rnd = Random::RandomRange(49.0, 99.0);
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INFO("rnd too small");
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REQUIRE(rnd >= 49.0);
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INFO("rnd too big");
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REQUIRE(rnd <= 99.0);
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}
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return;
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}
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// Checks that a random double is never outside the specification, negative minimum
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TEST_CASE(__FILE__"/Random_Doublerange_Never_Outside_Specification__neg__pos", "[Random][RandomRange]")
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{
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// Test 1000 random integers
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for (std::size_t i = 0; i < 1000; i++)
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{
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double rnd = Random::RandomRange(-39.0, 99.0);
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INFO("rnd too small");
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REQUIRE(rnd >= -39.0);
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INFO("rnd too big");
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REQUIRE(rnd <= 99.0);
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}
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return;
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}
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// Checks that a random double is never outside the specification, two negative values
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TEST_CASE(__FILE__"/Random_Doublerange_Never_Outside_Specification__neg__neg", "[Random][RandomRange]")
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{
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// Test 1000 random integers
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for (std::size_t i = 0; i < 1000; i++)
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{
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double rnd = Random::RandomRange(-39.0, -10.0);
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INFO("rnd too small");
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REQUIRE(rnd >= -39.0);
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INFO("rnd too big");
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REQUIRE(rnd <= -10.0);
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}
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return;
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}
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// Checks that the produced double-precision floating point distribution shows a big standard deviation
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TEST_CASE(__FILE__"/Double_Big_Standard_Deviation", "[Random][RandomRange]")
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{
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// Setup
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std::vector<double> rands;
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rands.resize(100);
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// Exercise
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// Create 1000 random values
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std::generate_n(rands.data(), rands.size(), []()->double { return Random::RandomRange(100, 4e9); });
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// Verify
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const double stddev = Testutil::Stddev(rands);
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REQUIRE(stddev >= 1000000);
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return;
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}
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