+ FILE * fh;
+ char const * message = "Testing fwrite()...\n";
+ char buffer[21];
+ buffer[20] = 'x';
+ TESTCASE( ( fh = tmpfile() ) != NULL );
+ /* fwrite() / readback */
+ TESTCASE( fwrite( message, 1, 20, fh ) == 20 );
+ rewind( fh );
+ TESTCASE( fread( buffer, 1, 20, fh ) == 20 );
+ TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+ TESTCASE( buffer[20] == 'x' );
+ /* same, different nmemb / size settings */
+ rewind( fh );
+ TESTCASE( memset( buffer, '\0', 20 ) == buffer );
+ TESTCASE( fwrite( message, 5, 4, fh ) == 4 );
+ rewind( fh );
+ TESTCASE( fread( buffer, 5, 4, fh ) == 4 );
+ TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+ TESTCASE( buffer[20] == 'x' );
+ /* same... */
+ rewind( fh );
+ TESTCASE( memset( buffer, '\0', 20 ) == buffer );
+ TESTCASE( fwrite( message, 20, 1, fh ) == 1 );
+ rewind( fh );
+ TESTCASE( fread( buffer, 20, 1, fh ) == 1 );
+ TESTCASE( memcmp( buffer, message, 20 ) == 0 );
+ TESTCASE( buffer[20] == 'x' );
+ /* Done. */
+ TESTCASE( fclose( fh ) == 0 );
+ return TEST_RESULTS;
+}