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d40d10aae7
This is a generally nicer-to-use version of the existing {any,all}_of()
that doesn't require the user to explicitly provide two iterators.
As a bonus, it also allows arbitrary iterators (as opposed to the hard
requirement of providing SimpleIterators in the iterator version).
60 lines
1.8 KiB
C++
60 lines
1.8 KiB
C++
/*
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* Copyright (c) 2020, 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 <LibTest/TestCase.h>
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#include <AK/AllOf.h>
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#include <AK/Array.h>
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TEST_CASE(should_determine_if_predicate_applies_to_all_elements_in_container)
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{
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constexpr Array<int, 10> a {};
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static_assert(all_of(a.begin(), a.end(), [](auto elem) { return elem == 0; }));
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static_assert(!all_of(a.begin(), a.end(), [](auto elem) { return elem == 1; }));
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EXPECT(all_of(a.begin(), a.end(), [](auto elem) { return elem == 0; }));
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EXPECT(!all_of(a.begin(), a.end(), [](auto elem) { return elem == 1; }));
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}
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TEST_CASE(container_form)
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{
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constexpr Array a { 10, 20, 30 };
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static_assert(all_of(a, [](auto elem) { return elem > 0; }));
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static_assert(!all_of(a, [](auto elem) { return elem > 10; }));
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EXPECT(all_of(a, [](auto elem) { return elem > 0; }));
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EXPECT(!all_of(a, [](auto elem) { return elem > 10; }));
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Vector b { 10, 20, 30 };
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EXPECT(all_of(b, [](auto elem) { return elem > 0; }));
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EXPECT(!all_of(b, [](auto elem) { return elem > 10; }));
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struct ArbitraryIterable {
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struct ArbitraryIterator {
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ArbitraryIterator(int v)
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: value(v)
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{
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}
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bool operator==(ArbitraryIterator const&) const = default;
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int operator*() const { return value; }
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ArbitraryIterator& operator++()
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{
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++value;
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return *this;
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}
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int value;
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};
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ArbitraryIterator begin() const { return 0; }
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ArbitraryIterator end() const { return 20; }
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};
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ArbitraryIterable c;
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EXPECT(all_of(c, [](auto elem) { return elem < 20; }));
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EXPECT(!all_of(c, [](auto elem) { return elem > 10; }));
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}
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