--- trunk/test/brains/SnapshotTestCase.cpp	2004/10/22 23:00:06	145
+++ trunk/test/brains/SnapshotTestCase.cpp	2004/10/22 23:09:57	146
@@ -3,17 +3,44 @@ void SnapshotTestCase::setUp() {
 CPPUNIT_TEST_SUITE_REGISTRATION( SnapshotTestCase );
 
 void SnapshotTestCase::setUp() {
+
 }
 
 void SnapshotTestCase::tearDown() {
+
 }
+
+void SnapshotTestCase::testMemoryLayout(){
+    //test memory layout
+    vector<Vector3d> v;
+    const int num = 10000000;
+    v.insert(v.end(), num, Vector3d(2.3, 0.84, 0.18));    
+
+    double* sbegin = v[0].getArrayPointer();
+    double* send = v[num-1].getArrayPointer() + 3;
+    
+    CPPUNIT_ASSERT_EQUAL(sizeof(Vector3d), sizeof(double) *3);    
+    CPPUNIT_ASSERT_EQUAL((unsigned  int) sbegin,(unsigned  int) &v[0]);
+    CPPUNIT_ASSERT_EQUAL((unsigned  int) send , (unsigned  int)&v[num]);
+
+    //test memory access
+    sbegin[12] = 32.01243;
+    sbegin[13] = 1.023343;
+    sbegin[14] = 82.025568;
+
+    CPPUNIT_ASSERT_DOUBLES_EQUAL(v[4][0], 32.01243, 0.00001);
+    CPPUNIT_ASSERT_DOUBLES_EQUAL(v[4][1], 1.023343, 0.00001);  
+    CPPUNIT_ASSERT_DOUBLES_EQUAL(v[4][2], 82.025568, 0.00001);
+
+    
+
+}
+
 void SnapshotTestCase::testConstructors(){
     Snapshot s;
 
-    s.pos.push_back(Vector3d(0, 1, 2));
-    s.zAngle.push_back(1.0);
+    s.atomData.zAngle.push_back(1.0);
     
-    double *p = Snapshot::getArrayPointer(s.zAngle);
+    double *p = Snapshot::getArrayPointer( s.atomData.zAngle);
 
-    p = Snapshot::getArrayPointer(s.pos);
-}
+}
\ No newline at end of file