1 files changed, 62 insertions, 0 deletions
diff --git a/test/std/containers/unord/unord.set/size.pass.cpp b/test/std/containers/unord/unord.set/size.pass.cpp
new file mode 100644
index 000000000..c127ddf26
--- /dev/null
+++ b/test/std/containers/unord/unord.set/size.pass.cpp
@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+//                     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.
+//
+//===----------------------------------------------------------------------===//
+
+// <unordered_set>
+
+// class unordered_set
+
+// size_type size() const noexcept;
+
+#include <unordered_set>
+#include <cassert>
+
+#include "test_macros.h"
+#include "min_allocator.h"
+
+int main()
+{
+    {
+    typedef std::unordered_set<int> M;
+    M m;
+    ASSERT_NOEXCEPT(m.size());
+    assert(m.size() == 0);
+    m.insert(M::value_type(2));
+    assert(m.size() == 1);
+    m.insert(M::value_type(1));
+    assert(m.size() == 2);
+    m.insert(M::value_type(3));
+    assert(m.size() == 3);
+    m.erase(m.begin());
+    assert(m.size() == 2);
+    m.erase(m.begin());
+    assert(m.size() == 1);
+    m.erase(m.begin());
+    assert(m.size() == 0);
+    }
+#if TEST_STD_VER >= 11
+    {
+    typedef std::unordered_set<int, std::hash<int>, std::equal_to<int>, min_allocator<int>> M;
+    M m;
+    ASSERT_NOEXCEPT(m.size());
+    assert(m.size() == 0);
+    m.insert(M::value_type(2));
+    assert(m.size() == 1);
+    m.insert(M::value_type(1));
+    assert(m.size() == 2);
+    m.insert(M::value_type(3));
+    assert(m.size() == 3);
+    m.erase(m.begin());
+    assert(m.size() == 2);
+    m.erase(m.begin());
+    assert(m.size() == 1);
+    m.erase(m.begin());
+    assert(m.size() == 0);
+    }
+#endif
+}