In test_AddElement() added EXCEPT_EQ statements to check padding zeros.

src/UnitTests/Matrices/SparseMatrixTest.h

@@ -248,12 +248,40 @@ void test_AddElement()
     m.addElement( 0, 4, 1, 0.0 );
     
     EXPECT_EQ( m.getElement( 0, 0 ), 1 );
+    EXPECT_EQ( m.getElement( 0, 1 ), 0 );
+    EXPECT_EQ( m.getElement( 0, 2 ), 0 );
+    EXPECT_EQ( m.getElement( 0, 3 ), 0 );
     EXPECT_EQ( m.getElement( 0, 4 ), 1 );
+    
     EXPECT_EQ( m.getElement( 1, 0 ), 2 );
+    EXPECT_EQ( m.getElement( 1, 1 ), 0 );
+    EXPECT_EQ( m.getElement( 1, 2 ), 0 );
+    EXPECT_EQ( m.getElement( 1, 3 ), 0 );
+    EXPECT_EQ( m.getElement( 1, 4 ), 0 );
+    
     EXPECT_EQ( m.getElement( 2, 0 ), 3 );
+    EXPECT_EQ( m.getElement( 2, 1 ), 0 );
+    EXPECT_EQ( m.getElement( 2, 2 ), 0 );
+    EXPECT_EQ( m.getElement( 2, 3 ), 0 );
+    EXPECT_EQ( m.getElement( 2, 4 ), 0 );
+    
     EXPECT_EQ( m.getElement( 3, 0 ), 4 );
+    EXPECT_EQ( m.getElement( 3, 1 ), 0 );
+    EXPECT_EQ( m.getElement( 3, 2 ), 0 );
+    EXPECT_EQ( m.getElement( 3, 3 ), 0 );
+    EXPECT_EQ( m.getElement( 3, 4 ), 0 );
+    
     EXPECT_EQ( m.getElement( 4, 0 ), 5 );
+    EXPECT_EQ( m.getElement( 4, 1 ), 0 );
+    EXPECT_EQ( m.getElement( 4, 2 ), 0 );
+    EXPECT_EQ( m.getElement( 4, 3 ), 0 );
+    EXPECT_EQ( m.getElement( 4, 4 ), 0 );
+    
     EXPECT_EQ( m.getElement( 5, 0 ), 6 );
+    EXPECT_EQ( m.getElement( 5, 1 ), 0 );
+    EXPECT_EQ( m.getElement( 5, 2 ), 0 );
+    EXPECT_EQ( m.getElement( 5, 3 ), 0 );
+    EXPECT_EQ( m.getElement( 5, 4 ), 0 );
 }
 
 template< typename Matrix >