Add unit tests for priority_queue::replace_top.

test/libcxx/containers/container.adaptors/priority.queue/priqueue.members/reemplace_top.pass.cpp

@@ -0,0 +1,33 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+
+// <queue>
+
+// priority_queue();
+
+// template <class... Args> void reemplace_top(Args&&... args);
+
+#include <queue>
+#include <cassert>
+
+#include "../../../../../std/containers/Emplaceable.h"
+
+int main()
+{
+    std::priority_queue<Emplaceable> q;
+    q.emplace(1, 2.5);
+    assert(q.top() == Emplaceable(1, 2.5));
+    q.emplace(3, 4.5);
+    assert(q.top() == Emplaceable(3, 4.5));
+    q.reemplace_top(2, 3.5);
+    assert(q.top() == Emplaceable(2, 3.5));
+    q.reemplace_top(0, 1.5);
+    assert(q.top() == Emplaceable(1, 2.5));
+}

test/libcxx/containers/container.adaptors/priority.queue/priqueue.members/replace_top.pass.cpp

@@ -0,0 +1,31 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// <queue>
+
+// priority_queue();
+
+// void replace_top(const value_type& v);
+
+#include <queue>
+#include <cassert>
+
+int main()
+{
+    std::priority_queue<int> q;
+    q.push(1);
+    assert(q.top() == 1);
+    q.push(3);
+    assert(q.top() == 3);
+    q.replace_top(2);
+    assert(q.top() == 2);
+    q.replace_top(0);
+    assert(q.top() == 1);
+
+    return 0;
+}

test/libcxx/containers/container.adaptors/priority.queue/priqueue.members/replace_top_rvalue.pass.cpp

@@ -0,0 +1,33 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03
+
+// <queue>
+
+// priority_queue();
+
+// void replace_top(value_type&& v);
+
+#include <queue>
+#include <cassert>
+
+#include "MoveOnly.h"
+
+int main()
+{
+    std::priority_queue<MoveOnly> q;
+    q.push(1);
+    assert(q.top() == 1);
+    q.push(3);
+    assert(q.top() == 3);
+    q.replace_top(2);
+    assert(q.top() == 2);
+    q.replace_top(0);
+    assert(q.top() == 1);
+}