forked from boostorg/unordered
1c606980ec
It seems my defect report was accepted at some point, and they tweaked the requirements involving bucket counts. This also makes it possible to have a bucket count of 0, which I think wasn't allowed in the past. I don't think I'll change this implementation to do so, but I'd like to be able to run these tests against standard implementations, so I'm starting to take that into account. I believe these changes were made after the C++14 standard, but I've always been tracking the draft standards, so that doesn't really matter.
99 lines
2.7 KiB
C++
99 lines
2.7 KiB
C++
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// Copyright 2006-2009 Daniel James.
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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#include "../helpers/prefix.hpp"
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#include <boost/unordered_set.hpp>
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#include <boost/unordered_map.hpp>
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#include "../helpers/postfix.hpp"
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#include "../helpers/test.hpp"
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#include <boost/limits.hpp>
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#include "../helpers/random_values.hpp"
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#if defined(BOOST_MSVC)
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#pragma warning(push)
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#pragma warning(disable:4127) // conditional expression is constant
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#endif
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namespace load_factor_tests
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{
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test::seed_t initialize_seed(783656);
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template <class X>
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void set_load_factor_tests(X*)
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{
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X x;
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BOOST_TEST(x.max_load_factor() == 1.0);
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BOOST_TEST(x.load_factor() == 0);
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// A valid implementation could fail these tests, but I think they're
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// reasonable.
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x.max_load_factor(2.0); BOOST_TEST(x.max_load_factor() == 2.0);
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x.max_load_factor(0.5); BOOST_TEST(x.max_load_factor() == 0.5);
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}
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template <class X>
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void insert_test(X*, float mlf, test::random_generator generator)
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{
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X x;
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x.max_load_factor(mlf);
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float b = x.max_load_factor();
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test::random_values<X> values(1000, generator);
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for(BOOST_DEDUCED_TYPENAME test::random_values<X>::const_iterator
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it = values.begin(), end = values.end(); it != end; ++it)
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{
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BOOST_DEDUCED_TYPENAME X::size_type old_size = x.size(),
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old_bucket_count = x.bucket_count();
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x.insert(*it);
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if(static_cast<double>(old_size + 1) <= b * static_cast<double>(old_bucket_count))
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BOOST_TEST(x.bucket_count() == old_bucket_count);
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}
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}
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template <class X>
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void load_factor_insert_tests(X* ptr, test::random_generator generator)
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{
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insert_test(ptr, 1.0f, generator);
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insert_test(ptr, 0.1f, generator);
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insert_test(ptr, 100.0f, generator);
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insert_test(ptr, (std::numeric_limits<float>::min)(),
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generator);
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if(std::numeric_limits<float>::has_infinity)
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insert_test(ptr, std::numeric_limits<float>::infinity(),
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generator);
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}
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boost::unordered_set<int>* int_set_ptr;
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boost::unordered_multiset<int>* int_multiset_ptr;
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boost::unordered_map<int, int>* int_map_ptr;
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boost::unordered_multimap<int, int>* int_multimap_ptr;
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using test::default_generator;
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using test::generate_collisions;
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UNORDERED_TEST(set_load_factor_tests,
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((int_set_ptr)(int_multiset_ptr)(int_map_ptr)(int_multimap_ptr))
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)
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UNORDERED_TEST(load_factor_insert_tests,
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((int_set_ptr)(int_multiset_ptr)(int_map_ptr)(int_multimap_ptr))
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((default_generator)(generate_collisions))
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)
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}
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RUN_TESTS()
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#if defined(BOOST_MSVC)
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#pragma warning(pop)
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#pragma warning(disable:4127) // conditional expression is constant
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#endif
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