Improve libhello with better error handling

1 files changed, 27 insertions, 0 deletions

diff --git a/libformat/tests/basics/driver.cxx b/libformat/tests/basics/driver.cxx
index 03faea7..dbc9358 100644
--- a/libformat/tests/basics/driver.cxx
+++ b/libformat/tests/basics/driver.cxx
@@ -1,4 +1,5 @@
 #include <cassert>
+#include <stdexcept>
 
 #include <libformat/version.hxx>
 #include <libformat/format.hxx>
@@ -8,7 +9,33 @@ using namespace format;
 
 int main ()
 {
+  // Basics.
+  //
   assert (format_hello ("Hello", "World", volume::quiet)  == "hello, World!");
   assert (format_hello ("Hello", "World", volume::normal) == "Hello, World!");
   assert (format_hello ("Hello", "World", volume::loud)   == "HELLO, World!");
+
+  // Empty greeting.
+  //
+  try
+  {
+    format_hello ("", "World");
+    assert (false);
+  }
+  catch (const invalid_argument& e)
+  {
+    assert (e.what () == string ("empty greeting"));
+  }
+
+  // Empty name.
+  //
+  try
+  {
+    format_hello ("Hello", "");
+    assert (false);
+  }
+  catch (const invalid_argument& e)
+  {
+    assert (e.what () == string ("empty name"));
+  }
 }