1 files changed, 63 insertions, 0 deletions
diff --git a/test/std/algorithms/alg.sorting/alg.sort/partial.sort/partial_sort.pass.cpp b/test/std/algorithms/alg.sorting/alg.sort/partial.sort/partial_sort.pass.cpp
new file mode 100644
index 000000000000..7bb43461cba4
--- /dev/null
+++ b/test/std/algorithms/alg.sorting/alg.sort/partial.sort/partial_sort.pass.cpp
@@ -0,0 +1,63 @@
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// <algorithm>
+
+// template<RandomAccessIterator Iter>
+//   requires ShuffleIterator<Iter>
+//         && LessThanComparable<Iter::value_type>
+//   void
+//   partial_sort(Iter first, Iter middle, Iter last);
+
+#include <algorithm>
+#include <cassert>
+
+void
+test_larger_sorts(unsigned N, unsigned M)
+{
+    assert(N != 0);
+    int* array = new int[N];
+    for (int i = 0; i < N; ++i)
+        array[i] = i;
+    std::random_shuffle(array, array+N);
+    std::partial_sort(array, array+M, array+N);
+    for (int i = 0; i < M; ++i)
+        assert(array[i] == i);
+    delete [] array;
+}
+
+void
+test_larger_sorts(unsigned N)
+{
+    test_larger_sorts(N, 0);
+    test_larger_sorts(N, 1);
+    test_larger_sorts(N, 2);
+    test_larger_sorts(N, 3);
+    test_larger_sorts(N, N/2-1);
+    test_larger_sorts(N, N/2);
+    test_larger_sorts(N, N/2+1);
+    test_larger_sorts(N, N-2);
+    test_larger_sorts(N, N-1);
+    test_larger_sorts(N, N);
+}
+
+int main()
+{
+    int i = 0;
+    std::partial_sort(&i, &i, &i);
+    assert(i == 0);
+    test_larger_sorts(10);
+    test_larger_sorts(256);
+    test_larger_sorts(257);
+    test_larger_sorts(499);
+    test_larger_sorts(500);
+    test_larger_sorts(997);
+    test_larger_sorts(1000);
+    test_larger_sorts(1009);
+}