Add array_swap_test.cpp

test/array_swap_test.cpp

@@ -0,0 +1,49 @@
+// Copyright 2025 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/array.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <cstddef>
+
+template<class T, std::size_t N> void test()
+{
+    boost::array<T, N> a1 = {};
+    boost::array<T, N> a2 = {};
+
+    a1.fill( 1 );
+    a2.fill( 2 );
+
+    a1.swap( a2 );
+
+    for( std::size_t i = 0; i < N; ++i )
+    {
+        BOOST_TEST_EQ( a1[i], 2 );
+        BOOST_TEST_EQ( a2[i], 1 );
+    }
+}
+
+template<class T> void test2()
+{
+    boost::array<T, 4> a1 = {{ 1, 2, 3, 4 }};
+    boost::array<T, 4> a2 = {{ 5, 6, 7, 8 }};
+
+    a1.swap( a2 );
+
+    for( int i = 0; i < 4; ++i )
+    {
+        BOOST_TEST_EQ( a1[i], i+5 );
+        BOOST_TEST_EQ( a2[i], i+1 );
+    }
+}
+
+int main()
+{
+    test<int, 0>();
+    test<int, 1>();
+    test<int, 7>();
+
+    test2<int>();
+
+    return boost::report_errors();
+}