added unit test

Author: romainfrancois

inst/NEWS.Rd

@@ -11,6 +11,8 @@
       \item The \code{[dpq]nbinom_mu()} scalar functions are now available via 
       the \code{R::} namespace when R 3.1.2 or newer is used.
       \item Add an additional test for AIX before attempting to include \code{execinfo.h}.
+      \item Rcpp::stop gains a printf like syntax, inspired from the implementation in
+      Rcpp11, using tinyformat
     }
     \item Changes in Rcpp Attributes:
     \itemize{

inst/unitTests/cpp/misc.cpp

@@ -151,3 +151,8 @@ StretchyList named_stretchy_list(){
     return out;
 }
 
+// [[Rcpp::export]]
+void test_stop_variadic(){
+    stop( "%s %d", "foo", 3 ) ;    
+}
+

inst/unitTests/runit.misc.R

@@ -139,5 +139,12 @@ if (.runThisTest) {
             pairlist( a = "foo", b = 1L, c = 3.2 )
             )
     }
+    
+    test.stop.variadic <- function(){
+        m <- tryCatch( test_stop_variadic(), error = function(e){
+            conditionMessage(e)  
+        })
+        checkEquals( m, "foo 3" ) 
+    }
 
 }