Put header-implemented unit test functions in anonymous namespaces to avoid duplicate symbols in SINGLE_TEST_EXE mode

tests/simulated2D.h

@@ -83,7 +83,7 @@ namespace simulated2D {
     }
   };
 
-
+  namespace {
     /// Prior on a single pose
     inline Point2 prior(const Point2& x) {
       return x;
@@ -120,6 +120,7 @@ namespace simulated2D {
         if (H2) *H2 = gtsam::eye(2);
         return l - x;
     }
+  }
 
   /**
    *  Unary factor encoding a soft prior on a vector

tests/smallExample.h

@@ -28,6 +28,7 @@
 
 namespace gtsam {
 namespace example {
+  namespace {
 
 typedef NonlinearFactorGraph Graph;
 
@@ -150,13 +151,9 @@ Ordering planarOrdering(size_t N);
 std::pair<GaussianFactorGraph, GaussianFactorGraph > splitOffPlanarTree(
     size_t N, const GaussianFactorGraph& original);
 
-} // example
-} // gtsam
 
 
 // Implementations
-namespace gtsam {
-namespace example {
 
 //  using namespace gtsam::noiseModel;
 
@@ -649,5 +646,6 @@ std::pair<GaussianFactorGraph, GaussianFactorGraph > splitOffPlanarTree(size_t N
 
 /* ************************************************************************* */
 
+} // anonymous namespace
 } // \namespace example
 } // \namespace gtsam