Started exporting VMD class to python.

Required by basis vector methods in MDGeometry
Refs #6027

Code/Mantid/Framework/PythonInterface/mantid/kernel/CMakeLists.txt

@@ -17,6 +17,7 @@ set ( EXPORT_FILES
   src/Exports/ArrayProperty.cpp
   src/Exports/Quat.cpp
   src/Exports/V3D.cpp
+  src/Exports/VMD.cpp
   src/Exports/StlContainers.cpp
   src/Exports/Logger.cpp
   src/Exports/Unit.cpp

Code/Mantid/Framework/PythonInterface/mantid/kernel/src/Exports/VMD.cpp

@@ -0,0 +1,40 @@
+#include "MantidKernel/VMD.h"
+#include <boost/python/class.hpp>
+#include <boost/python/copy_const_reference.hpp>
+#include <boost/python/make_constructor.hpp>
+#include <boost/python/operators.hpp>
+#include <boost/python/return_value_policy.hpp>
+
+using Mantid::Kernel::VMD;
+using Mantid::Kernel::VMD_t;
+using namespace boost::python;
+
+void export_VMD()
+{
+  class_<VMD>("VMD", init<>("Default constructor gives an object with 1 dimension"))
+    .def(init<VMD_t,VMD_t>("Constructs a 2 dimensional vector at the point given", args(("val0"),("val1"))))
+    .def(init<VMD_t,VMD_t,VMD_t>("Constructs a 3 dimensional vector at the point given", 
+                                 args(("val0"),("val1"),("val2"))))
+    .def(init<VMD_t,VMD_t,VMD_t,VMD_t>("Constructs a 4 dimensional vector at the point given", 
+                                       args(("val0"),("val1"),("val2"),("val3"))))
+    .def(init<VMD_t,VMD_t,VMD_t,VMD_t,VMD_t>("Constructs a 5 dimensional vector at the point given", 
+                                             args(("val0"),("val1"),("val2"),("val3"),("val4"))))
+    .def(init<VMD_t,VMD_t,VMD_t,VMD_t,VMD_t,VMD_t>("Constructs a 6 dimensional vector at the point given", 
+                                                   args(("val0"),("val1"),("val2"),("val3"),("val5"))))
+
+    .def("getNumDims", &VMD::getNumDims, "Returns the number of dimensions the contained in the vector")
+
+    //----------------------------- special methods --------------------------------
+    .def("__getitem__", (const VMD_t &(VMD::*)(size_t)const)&VMD::operator[], return_value_policy<copy_const_reference>())
+    .def(self + self)
+    .def(self += self)
+      // cppcheck-suppress duplicateExpression
+    .def(self - self)
+    .def(self -= self)
+    .def(self * self)
+    .def(self *= self)
+    .def(self / self)
+    .def(self /= self)
+    ;
+}
+

Code/Mantid/Framework/PythonInterface/test/python/mantid/kernel/CMakeLists.txt

@@ -28,6 +28,7 @@ set ( TEST_PY_FILES
   UnitFactoryTest.py
   UnitsTest.py
   V3DTest.py
+  VMDTest.py
 )
 
 check_tests_valid ( ${CMAKE_CURRENT_SOURCE_DIR} ${TEST_PY_FILES} )

Code/Mantid/Framework/PythonInterface/test/python/mantid/kernel/VMDTest.py

@@ -0,0 +1,33 @@
+import unittest
+from mantid.kernel import VMD
+
+class VMDTest(unittest.TestCase):
+
+    def test_default_construction_gives_object_with_single_dimension(self):
+        one = VMD()
+        self.assertEquals(1, one.getNumDims())
+
+    def test_constructors_with_dimension_pts(self):
+        pts = [1]
+        for i in range(2,7):
+            pts.append(i)
+            vector = VMD(*pts) #unpack list
+            self.assertEquals(i, vector.getNumDims())
+
+    def test_value_access_is_read_only(self):
+        vector = VMD(1.0,2.0)
+        self.assertAlmostEqual(1.0, vector[0])
+        self.assertAlmostEqual(2.0, vector[1])
+
+        try:
+            vector[1] = 5.0
+        except TypeError:
+            pass
+        except:
+            self.fail("Operator setters have thrown an unexpected exception type. Expected TypeError.")
+        else:
+            self.fail("Operator setters have not thrown an exception. Expected to be read only.")
+
+
+if __name__ == '__main__':
+    unittest.main()