[test,fieldvector] also test for GMPField

most of the tests work. std::complex<GMPField> does not work as expected, but this is
perhaps something we don't want to support. As std::complex does not allow to initialize
with other parameters than the data type itself, we can not initialize from int or other
compatible scalar values. The smae problem occures when interacting with int values directly.

dune/common/test/fvectortest.cc

@@ -7,6 +7,7 @@
 #include <dune/common/exceptions.hh>
 #include <dune/common/typetraits.hh>
 #include <dune/common/classname.hh>
+#include <dune/common/gmpfield.hh>
 #include <iostream>
 #include <complex>
 #include <typeinfo>
@@ -380,6 +381,17 @@ int main()
     FieldVectorTest<double, 3>();
     FieldVectorTest<int, 1>();
     FieldVectorTest<double, 1>();
+#if HAVE_GMP
+    // we skip the complex test and the int test, as these will be very hard to implement with GMPField
+    typedef Dune::GMPField<128u> ft;
+    FieldVectorMainTest<ft,ft,3>();
+    FieldVectorMainTest<ft,ft,2>();
+    FieldVectorMainTest<ft,ft,1>();
+    FieldVectorMainTest<ft,ft,0>();
+    ScalarOperatorTest<ft>();
+    ScalarOrderingTest<ft>();
+    DotProductTest<ft,3>();
+#endif // HAVE_GMP
 
     test_nan();
     test_infinity_norms();