1 files changed, 62 insertions, 0 deletions
diff --git a/libcxx/test/std/containers/associative/map/contains.pass.cpp b/libcxx/test/std/containers/associative/map/contains.pass.cpp
new file mode 100644
index 00000000000..5b71eedba4d
--- /dev/null
+++ b/libcxx/test/std/containers/associative/map/contains.pass.cpp
@@ -0,0 +1,62 @@
+//===----------------------------------------------------------------------===//
+//
+// 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, c++11, c++14, c++17
+
+#include <cassert>
+#include <map>
+
+// <map>
+
+// bool contains(const key_type& x) const;
+
+template <typename T, typename P, typename B, typename... Pairs>
+void test(B bad, Pairs... args) {
+    T map;
+    P pairs[] = {args...};
+
+    for (auto& p : pairs) map.insert(p);
+    for (auto& p : pairs) assert(map.contains(p.first));
+
+    assert(!map.contains(bad));
+}
+
+struct E { int a = 1; double b = 1; char c = 1; };
+
+int main(int, char**)
+{
+    {
+        test<std::map<char, int>, std::pair<char, int> >(
+            'e', std::make_pair('a', 10), std::make_pair('b', 11),
+            std::make_pair('c', 12), std::make_pair('d', 13));
+
+        test<std::map<char, char>, std::pair<char, char> >(
+            'e', std::make_pair('a', 'a'), std::make_pair('b', 'a'),
+            std::make_pair('c', 'a'), std::make_pair('d', 'b'));
+
+        test<std::map<int, E>, std::pair<int, E> >(
+            -1, std::make_pair(1, E{}), std::make_pair(2, E{}),
+            std::make_pair(3, E{}), std::make_pair(4, E{}));
+    }
+    {
+        test<std::multimap<char, int>, std::pair<char, int> >(
+            'e', std::make_pair('a', 10), std::make_pair('b', 11),
+            std::make_pair('c', 12), std::make_pair('d', 13));
+
+        test<std::multimap<char, char>, std::pair<char, char> >(
+            'e', std::make_pair('a', 'a'), std::make_pair('b', 'a'),
+            std::make_pair('c', 'a'), std::make_pair('d', 'b'));
+
+        test<std::multimap<int, E>, std::pair<int, E> >(
+            -1, std::make_pair(1, E{}), std::make_pair(2, E{}),
+            std::make_pair(3, E{}), std::make_pair(4, E{}));
+    }
+
+    return 0;
+}
+