log(-<realnumber>) now returns a real number

[ginac.git] / check / exam_pseries.cpp

diff --git a/check/exam_pseries.cpp b/check/exam_pseries.cpp
index 7b4473469a2a14c6c075a3812f45aa118bbe58cc..040c5e58a047d2e1712109467e95ea2493ca6a87 100644 (file)
--- a/check/exam_pseries.cpp
+++ b/check/exam_pseries.cpp
@@ -43,9 +43,15 @@ static unsigned exam_series1()
 {
        using GiNaC::log;
 
+       symbol a("a");
+       symbol b("b");
        unsigned result = 0;
        ex e, d;
        
+       e = pow(a+b, x);
+       d = 1 + Order(pow(x, 1));
+       result += check_series(e, 0, d, 1);
+
        e = sin(x);
        d = x - pow(x, 3) / 6 + pow(x, 5) / 120 - pow(x, 7) / 5040 + Order(pow(x, 8));
        result += check_series(e, 0, d);
@@ -115,11 +121,18 @@ static unsigned exam_series1()
            + Order(pow(x, 2));
        result += check_series(e, 0, d, 2);
        
-       symbol a("a");
+       e = sqrt(1+x*x) * sqrt(1+2*x*x);
+       d = 1 + Order(pow(x, 2));
+       result += check_series(e, 0, d, 2);
+
        e = pow(x, 4) * sin(a) + pow(x, 2);
        d = pow(x, 2) + Order(pow(x, 3));
        result += check_series(e, 0, d, 3);
 
+       e = log(a*x + b*x*x*log(x));
+       d = log(a*x) + b/a*log(x)*x - pow(b/a, 2)/2*pow(log(x)*x, 2) + Order(pow(x, 3));
+       result += check_series(e, 0, d, 3);
+
        return result;
 }