1 files changed, 119 insertions, 0 deletions
diff --git a/pstl/test/std/algorithms/alg.merge/merge.pass.cpp b/pstl/test/std/algorithms/alg.merge/merge.pass.cpp
new file mode 100644
index 00000000000..a80bbae07f8
--- /dev/null
+++ b/pstl/test/std/algorithms/alg.merge/merge.pass.cpp
@@ -0,0 +1,119 @@
+// -*- C++ -*-
+//===-- merge.pass.cpp ----------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "support/pstl_test_config.h"
+
+#ifdef PSTL_STANDALONE_TESTS
+#include <algorithm>
+#include <functional>
+#include "pstl/execution"
+#include "pstl/algorithm"
+
+#else
+#include <execution>
+#include <algorithm>
+#endif // PSTL_STANDALONE_TESTS
+
+#include "support/utils.h"
+
+using namespace TestUtils;
+
+struct test_merge
+{
+    template <typename Policy, typename InputIterator1, typename InputIterator2, typename OutputIterator,
+              typename Compare>
+    void
+    operator()(Policy&& exec, InputIterator1 first1, InputIterator1 last1, InputIterator2 first2, InputIterator2 last2,
+               OutputIterator out_first, OutputIterator out_last, Compare comp)
+    {
+        using namespace std;
+        {
+            const auto res = merge(exec, first1, last1, first2, last2, out_first, comp);
+            EXPECT_TRUE(res == out_last, "wrong return result from merge with predicate");
+            EXPECT_TRUE(is_sorted(out_first, res, comp), "wrong result from merge with predicate");
+            EXPECT_TRUE(includes(out_first, res, first1, last1, comp), "first sequence is not a part of result");
+            EXPECT_TRUE(includes(out_first, res, first2, last2, comp), "second sequence is not a part of result");
+        }
+        {
+            const auto res = merge(exec, first1, last1, first2, last2, out_first);
+            EXPECT_TRUE(res == out_last, "wrong return result from merge");
+            EXPECT_TRUE(is_sorted(out_first, res), "wrong result from merge");
+        }
+    }
+
+    // for reverse iterators
+    template <typename Policy, typename InputIterator1, typename InputIterator2, typename OutputIterator,
+              typename Compare>
+    void
+    operator()(Policy&& exec, std::reverse_iterator<InputIterator1> first1, std::reverse_iterator<InputIterator1> last1,
+               std::reverse_iterator<InputIterator2> first2, std::reverse_iterator<InputIterator2> last2,
+               std::reverse_iterator<OutputIterator> out_first, std::reverse_iterator<OutputIterator> out_last,
+               Compare comp)
+    {
+        using namespace std;
+        typedef typename std::iterator_traits<std::reverse_iterator<InputIterator1>>::value_type T;
+        const auto res = merge(exec, first1, last1, first2, last2, out_first, std::greater<T>());
+
+        EXPECT_TRUE(res == out_last, "wrong return result from merge with predicate");
+        EXPECT_TRUE(is_sorted(out_first, res, std::greater<T>()), "wrong result from merge with predicate");
+        EXPECT_TRUE(includes(out_first, res, first1, last1, std::greater<T>()),
+                    "first sequence is not a part of result");
+        EXPECT_TRUE(includes(out_first, res, first2, last2, std::greater<T>()),
+                    "second sequence is not a part of result");
+    }
+};
+
+template <typename T, typename Generator1, typename Generator2>
+void
+test_merge_by_type(Generator1 generator1, Generator2 generator2)
+{
+    using namespace std;
+    size_t max_size = 100000;
+    Sequence<T> in1(max_size, generator1);
+    Sequence<T> in2(max_size / 2, generator2);
+    Sequence<T> out(in1.size() + in2.size());
+    std::sort(in1.begin(), in1.end());
+    std::sort(in2.begin(), in2.end());
+
+    for (size_t size = 0; size <= max_size; size = size <= 16 ? size + 1 : size_t(3.1415 * size))
+    {
+        invoke_on_all_policies(test_merge(), in1.cbegin(), in1.cbegin() + size, in2.data(), in2.data() + size / 2,
+                               out.begin(), out.begin() + 1.5 * size, std::less<T>());
+        invoke_on_all_policies(test_merge(), in1.data(), in1.data() + size, in2.cbegin(), in2.cbegin() + size / 2,
+                               out.begin(), out.begin() + 3 * size / 2, std::less<T>());
+    }
+}
+
+template <typename T>
+struct test_non_const
+{
+    template <typename Policy, typename InputIterator, typename OutputIterator>
+    void
+    operator()(Policy&& exec, InputIterator input_iter, OutputIterator out_iter)
+    {
+        merge(exec, input_iter, input_iter, input_iter, input_iter, out_iter, non_const(std::less<T>()));
+    }
+};
+
+int32_t
+main()
+{
+    test_merge_by_type<int32_t>([](size_t v) { return (v % 2 == 0 ? v : -v) * 3; }, [](size_t v) { return v * 2; });
+    test_merge_by_type<float64_t>([](size_t v) { return float64_t(v); }, [](size_t v) { return float64_t(v - 100); });
+
+#if !__PSTL_ICC_16_17_TEST_64_TIMEOUT
+    test_merge_by_type<Wrapper<int16_t>>([](size_t v) { return Wrapper<int16_t>(v % 100); },
+                                         [](size_t v) { return Wrapper<int16_t>(v % 10); });
+#endif
+
+    test_algo_basic_double<int32_t>(run_for_rnd_fw<test_non_const<int32_t>>());
+
+    std::cout << done() << std::endl;
+    return 0;
+}