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FrequencyVariancesTest.h
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FrequencyVariancesTest.h
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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
// NScD Oak Ridge National Laboratory, European Spallation Source,
// Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
#include <cxxtest/TestSuite.h>
#include "MantidHistogramData/BinEdges.h"
#include "MantidHistogramData/CountStandardDeviations.h"
#include "MantidHistogramData/CountVariances.h"
#include "MantidHistogramData/FrequencyStandardDeviations.h"
#include "MantidHistogramData/FrequencyVariances.h"
using namespace Mantid;
using namespace HistogramData;
class FrequencyVariancesTest : public CxxTest::TestSuite {
public:
// This pair of boilerplate methods prevent the suite being created statically
// This means the constructor isn't called when running other tests
static FrequencyVariancesTest *createSuite() { return new FrequencyVariancesTest(); }
static void destroySuite(FrequencyVariancesTest *suite) { delete suite; }
void test_has_correct_mixins() {
FrequencyVariances data;
TS_ASSERT_THROWS_NOTHING(UNUSED_ARG(
(dynamic_cast<detail::VarianceVectorOf<FrequencyVariances, HistogramE, FrequencyStandardDeviations> &>(data))));
}
void test_construct_default() {
const FrequencyVariances frequencies{};
TS_ASSERT(!frequencies);
}
void test_conversion_identity() {
const FrequencyVariances variances{1.0, 4.0, 9.0};
const FrequencyStandardDeviations sigmas(variances);
const FrequencyVariances result(sigmas);
TS_ASSERT_EQUALS(result[0], variances[0]);
TS_ASSERT_EQUALS(result[1], variances[1]);
TS_ASSERT_EQUALS(result[2], variances[2]);
}
void test_construct_from_null_CountVariances() {
const CountVariances counts{};
const BinEdges edges{};
const FrequencyVariances frequencies(counts, edges);
TS_ASSERT(!frequencies);
}
void test_construct_from_empty_CountVariances() {
const CountVariances counts(0);
const BinEdges edges{0};
const FrequencyVariances frequencies(counts, edges);
TS_ASSERT_EQUALS(frequencies.size(), 0);
}
void test_construct_from_empty_CountVariances_null_BinEdges() {
const CountVariances counts(0);
const BinEdges edges{};
TS_ASSERT_THROWS(const FrequencyVariances frequencies(counts, edges), const std::logic_error &);
}
void test_construct_from_empty_CountVariances_size_mismatch() {
const CountVariances counts(0);
const BinEdges edges{1.0, 2.0};
TS_ASSERT_THROWS(const FrequencyVariances frequencies(counts, edges), const std::logic_error &);
}
void test_construct_from_CountVariances_null_BinEdges() {
const CountVariances counts(1);
const BinEdges edges{};
TS_ASSERT_THROWS(const FrequencyVariances frequencies(counts, edges), const std::logic_error &);
}
void test_construct_from_CountVariances_size_mismatch() {
const CountVariances counts(2);
const BinEdges edges{1.0, 2.0};
TS_ASSERT_THROWS(const FrequencyVariances frequencies(counts, edges), const std::logic_error &);
}
void test_construct_from_CountVariances() {
const CountVariances counts{1.0, 2.0};
const BinEdges edges{0.1, 0.2, 0.4};
const FrequencyVariances frequencies(counts, edges);
TS_ASSERT_EQUALS(frequencies.size(), 2);
TS_ASSERT_DELTA(frequencies[0], 100.0, 1e-14);
TS_ASSERT_DELTA(frequencies[1], 50.0, 1e-14);
}
void test_move_construct_from_CountVariances() {
CountVariances counts(1);
const BinEdges edges{1.0, 2.0};
auto old_ptr = &counts[0];
const FrequencyVariances frequencies(std::move(counts), edges);
TS_ASSERT_EQUALS(&frequencies[0], old_ptr);
}
void test_move_construct_from_CountVariances_and_cow() {
CountVariances counts(1);
const CountVariances copy(counts);
const BinEdges edges{1.0, 2.0};
auto old_ptr = &counts[0];
const FrequencyVariances frequencies(std::move(counts), edges);
// ... but made a copy of data, since "copy" also held a reference.
TS_ASSERT_DIFFERS(&frequencies[0], old_ptr);
}
void test_construct_from_CountStandardDeviations() {
const CountStandardDeviations counts{1.0, M_SQRT2};
const BinEdges edges{0.1, 0.2, 0.4};
// This implicitly constructs CountVariances first.
const FrequencyVariances frequencies(counts, edges);
TS_ASSERT_EQUALS(frequencies.size(), 2);
TS_ASSERT_DELTA(frequencies[0], 100.0, 1e-14);
TS_ASSERT_DELTA(frequencies[1], 50.0, 1e-14);
}
void test_move_construct_from_CountStandardDeviations() {
CountStandardDeviations counts(1);
const BinEdges edges{1.0, 2.0};
auto old_ptr = &counts[0];
// This implicitly constructs CountVariances first, so there is a
// two-step move going on!
const FrequencyVariances frequencies(std::move(counts), edges);
TS_ASSERT_EQUALS(&frequencies[0], old_ptr);
}
};