Add CMake tests

test/cmake_install_test/main.cpp

@@ -0,0 +1,18 @@
+// Copyright 2017, 2021 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/tuple/tuple.hpp>
+#include <cassert>
+
+#define BOOST_TEST(expr) assert(expr)
+#define BOOST_TEST_EQ(x1, x2) assert((x1)==(x2))
+
+int main()
+{
+    boost::tuple<int, int, int> tp( 1, 2, 3 );
+
+    BOOST_TEST_EQ( boost::get<0>(tp), 1 );
+    BOOST_TEST_EQ( boost::get<1>(tp), 2 );
+    BOOST_TEST_EQ( boost::get<2>(tp), 3 );
+}