Move operator<<(std::ostream&, wxRect) overload to a header

This will allow reusing it in other tests too.

Also make the output slightly more readable by formatting the rectangle
as "{x,y w*h}" instead of "{x,y,w,h}".

No real changes.

tests/asserthelper.cpp

@@ -67,3 +67,11 @@ std::ostream& operator<<(std::ostream& os, const wxPoint& p)
 
     return os;
 }
+
+std::ostream& operator<<(std::ostream& os, const wxRect& r)
+{
+    os << "{"
+        << r.x << ", " << r.y << "  " << r.width << "*" << r.height
+       << "}";
+    return os;
+}

tests/asserthelper.h

@@ -35,5 +35,6 @@ std::ostream& operator<<(std::ostream& os, const wxColour& c);
 std::ostream& operator<<(std::ostream& os, const wxSize& s);
 std::ostream& operator<<(std::ostream& os, const wxFont& f);
 std::ostream& operator<<(std::ostream& os, const wxPoint& p);
+std::ostream& operator<<(std::ostream& os, const wxRect& r);
 
 #endif

tests/geometry/rect.cpp

@@ -22,18 +22,7 @@
 
 #include "wx/iosfwrap.h"
 
-// ----------------------------------------------------------------------------
+#include "asserthelper.h"
-// helper functions
-// ----------------------------------------------------------------------------
-
-// this operator is needed to use CPPUNIT_ASSERT_EQUAL with wxRects
-std::ostream& operator<<(std::ostream& os, const wxRect& r)
-{
-    os << "{"
-        << r.x << ", " << r.y << ", " << r.width << ", " << r.height
-       << "}";
-    return os;
-}
 
 // ----------------------------------------------------------------------------
 // test class