Make sure add::eval() collects all numeric terms.

[ginac.git] / check / exam_paranoia.cpp

diff --git a/check/exam_paranoia.cpp b/check/exam_paranoia.cpp
index 61bd85debb427dd380b9c1fa3145a0292f140e44..9e6fb015f6b84e05be483d9dde9155e6df62a8e2 100644 (file)
--- a/check/exam_paranoia.cpp
+++ b/check/exam_paranoia.cpp
@@ -467,6 +467,18 @@ static unsigned exam_paranoia17()
        return test_cycl.get_free_indices().size();
 }
 
+// Bug in add::eval() could result in numeric terms not being collected into
+// the overall coefficient. Fixed on Sep 22, 2010
+static unsigned exam_paranoia18()
+{
+       ex sqrt2 = sqrt(ex(2));
+       ex e = 1+2*(sqrt2+1)*(sqrt2-1);
+       if ( e.real_part() != 3 ) {
+               clog << "real_part(1+2*(sqrt(2)+1)*(sqrt(2)-1)) failed to evaluate to 3\n";
+               return 1;
+       }
+       return 0;
+}
 
 unsigned exam_paranoia()
 {
@@ -491,6 +503,7 @@ unsigned exam_paranoia()
        result += exam_paranoia15();  cout << '.' << flush;
        result += exam_paranoia16();  cout << '.' << flush;
        result += exam_paranoia17();  cout << '.' << flush;
+       result += exam_paranoia18();  cout << '.' << flush;
        
        return result;
 }