power::series(): handle someg (trivial) singularities of the exponent...

[ginac.git] / check / exam_pseries.cpp

diff --git a/check/exam_pseries.cpp b/check/exam_pseries.cpp
index 4b6143339461d877b6c652b73c6b7bcf45889469..a0f87eade96c06cadbda75a74ac5045d228c8434 100644 (file)
--- a/check/exam_pseries.cpp
+++ b/check/exam_pseries.cpp
@@ -173,6 +173,7 @@ static unsigned exam_series3()
 // Series exponentiation
 static unsigned exam_series4()
 {
+       using GiNaC::tgamma;
        unsigned result = 0;
        ex e, d;
        
@@ -211,6 +212,7 @@ static unsigned exam_series5()
 // Series expansion of tgamma(-1)
 static unsigned exam_series6()
 {
+       using GiNaC::tgamma;
        ex e = tgamma(2*x);
        ex d = pow(x+1,-1)*numeric(1,4) +
               pow(x+1,0)*(numeric(3,4) -
@@ -328,6 +330,7 @@ static unsigned exam_series11()
 static unsigned exam_series12()
 {
        using GiNaC::log;
+       using GiNaC::atanh;
 
        unsigned result = 0;
        ex e, d;
@@ -366,6 +369,23 @@ static unsigned exam_series13()
        return result;
 }
 
+// Test if (1+x)^(1/x) can be expanded.
+static unsigned exam_series14()
+{
+       unsigned result = 0;
+
+       ex e = pow(1+x, sin(x)/x);
+       ex d = 1 + x - pow(x,3)/6 + Order(pow(x,4));
+       try {
+               result += check_series(e,0,d,4);
+       } catch (const pole_error& err) {
+               clog << "series expansion of " << e << " at 0 raised an exception." << endl;
+               ++result;
+       }
+
+       return result;
+}
+
 unsigned exam_pseries()
 {
        unsigned result = 0;
@@ -385,6 +405,7 @@ unsigned exam_pseries()
        result += exam_series11();  cout << '.' << flush;
        result += exam_series12();  cout << '.' << flush;
        result += exam_series13();  cout << '.' << flush;
+       result += exam_series14();  cout << '.' << flush;
        
        return result;
 }