Improve test coverage.

Author: ColinH

include/tao/json/value.hh

@@ -315,6 +315,13 @@ namespace tao
             destroy();
             unsafe_assign( t );
          }
+
+         void operator= ( const char * s )
+         {
+            destroy();
+            unsafe_assign( s );
+         }
+
          void operator= ( std::string && s ) noexcept
          {
             destroy();
@@ -758,6 +765,18 @@ namespace tao
             new ( & m_union.s ) std::string( std::move( s ) );
          }
 
+         void unsafe_assign( const char * s )
+         {
+            m_type = json::type::STRING;
+            new ( & m_union.s ) std::string( s );
+         }
+
+         void unsafe_assign( const char * s, const std::size_t l )
+         {
+            m_type = json::type::STRING;
+            new ( & m_union.s ) std::string( s, l );
+         }
+
          void unsafe_assign( const std::string & s )
          {
             m_type = json::type::STRING;
@@ -816,8 +835,6 @@ namespace tao
          //    m_type = json::type::OBJECT;
          // }
 
-         
-
       private:
          value( const char ) = delete;
          value( const unsigned long ) = delete;
@@ -899,7 +916,7 @@ namespace tao
                   new ( & m_union.o ) std::map< std::string, value >( std::move( r.m_union.o ) );
                   return;
             }
-            assert( false );
+            assert( false );  // LCOV_EXCL_LINE
          }
 
          void embed( const value & r )
@@ -921,7 +938,7 @@ namespace tao
                   new ( & m_union.o ) std::map< std::string, value >( r.m_union.o );
                   return;
             }
-            assert( false );
+            assert( false );  // LCOV_EXCL_LINE
          }
 
          void destroy() noexcept
@@ -942,7 +959,7 @@ namespace tao
                   m_union.o.~map();
                   return;
             }
-            assert( false );
+            assert( false );  // LCOV_EXCL_LINE
          }
 
          static void check_finite( const double d )

src/test/json/create.cc

@@ -267,6 +267,40 @@ namespace tao
          TEST_THROWS( v = b );
          TEST_THROWS( v = c );
 
+         v = nullptr;
+
+         TEST_ASSERT( v.type() == type::NULL_ );
+
+         v = true;
+
+         TEST_ASSERT( v.type() == type::BOOL_ );
+         TEST_ASSERT( v.get_bool() );
+
+         v = 1;
+
+         TEST_ASSERT( v.type() == type::INT64 );
+         TEST_ASSERT( v.get_int64() == 1 );
+
+         v = 2.0;
+
+         TEST_ASSERT( v.type() == type::DOUBLE );
+         TEST_ASSERT( v.get_double() == 2.0 );
+
+         v = "hallo";
+
+         TEST_ASSERT( v.type() == type::STRING );
+         TEST_ASSERT( v.get_string() == "hallo" );
+
+         v = std::vector< value >();
+
+         TEST_ASSERT( v.type() == type::ARRAY );
+         TEST_ASSERT( v.get_array().empty() );
+
+         v = std::map< std::string, value >();
+
+         TEST_ASSERT( v.type() == type::OBJECT );
+         TEST_ASSERT( v.get_object().empty() );
+
          test_string( "" );
          test_string( "foo" );
          test_string( "abcdefghijklmnpqrstuvwxyz" );