Add test/append_digest.cpp

test/Jamfile

@@ -74,6 +74,7 @@ run hash_append_range.cpp ;
 run hash_append_range_2.cpp ;
 
 run append_zero_sized.cpp ;
+run append_digest.cpp ;
 
 # hash_append, constexpr
 

test/append_digest.cpp

@@ -0,0 +1,55 @@
+// Copyright 2017, 2024 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/hash2/hash_append.hpp>
+#include <boost/hash2/fnv1a.hpp>
+#include <boost/hash2/digest.hpp>
+#include <boost/core/lightweight_test.hpp>
+#include <array>
+
+template<class Hash, class Flavor, class R> void test( R r )
+{
+    Flavor f;
+
+    {
+        unsigned char v[4] = { 1, 2, 3, 4 };
+
+        Hash h;
+
+        hash_append( h, f, v );
+
+        BOOST_TEST_EQ( h.result(), r );
+    }
+
+    {
+        std::array<unsigned char, 4> v = {{ 1, 2, 3, 4 }};
+
+        Hash h;
+
+        hash_append( h, f, v );
+
+        BOOST_TEST_EQ( h.result(), r );
+    }
+
+    {
+        boost::hash2::digest<4> v = {{ 1, 2, 3, 4 }};
+
+        Hash h;
+
+        hash_append( h, f, v );
+
+        BOOST_TEST_EQ( h.result(), r );
+    }
+}
+
+int main()
+{
+    using namespace boost::hash2;
+
+    test<fnv1a_32, default_flavor>( 1463068797 );
+    test<fnv1a_32, little_endian_flavor>( 1463068797 );
+    test<fnv1a_32, big_endian_flavor>( 1463068797 );
+
+    return boost::report_errors();
+}