From 59e2b7911b920f4705c9d5d241ccfba6f743c284 Mon Sep 17 00:00:00 2001
From: Paul Beckingham <paul@beckingham.net>
Date: Tue, 22 Dec 2015 09:46:14 -0500
Subject: [PATCH] Tests: Added test for empty grammar string

---
 test/grammar.t.cpp | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/test/grammar.t.cpp b/test/grammar.t.cpp
index 700e5c51..4bc87d49 100644
--- a/test/grammar.t.cpp
+++ b/test/grammar.t.cpp
@@ -31,7 +31,7 @@
 ////////////////////////////////////////////////////////////////////////////////
 int main (int, char**)
 {
-  UnitTest t (2);
+  UnitTest t (3);
 
   // Test loading from a missing file.
   Grammar g;
@@ -41,13 +41,25 @@ int main (int, char**)
   try
   {
     g.loadFromFile (missing);
-    t.fail ("Grammar::loadFromFile did not notice a missing file");
+    t.fail ("Grammar::loadFromFile accepted a missing file");
   }
   catch (std::string s)
   {
-    t.pass ("Grammar::loadFromFile noticed a file was missing");
+    t.diag (s);
+    t.pass ("Grammar::loadFromFile rejected a missing file");
   }
 
+  // Test error on parsing an empty grammar.
+  try
+  {
+    g.loadFromString ("");
+    t.fail ("Grammar::loadFromFile accepted an empty grammar");
+  }
+  catch (std::string s)
+  {
+    t.diag (s);
+    t.pass ("Grammar::loadFromFile rejected an empty grammar");
+  }
   return 0;
 }