feat: add analysis model objects

tests/core/node_test.cpp

@@ -1,5 +1,8 @@
 #include "fesa/core/Node.hpp"
 
+#include <array>
+#include <type_traits>
+
 namespace {
 
 int require(bool condition) {
@@ -11,6 +14,9 @@ int require(bool condition) {
 int run_node_tests() {
     const fesa::core::Node node{42, 1.0, 2.0, 3.0};
 
+    if (const int result = require(fesa::core::Node::dofCount() == 6); result != 0) {
+        return result;
+    }
     if (const int result = require(node.id() == 42); result != 0) {
         return result;
     }
@@ -32,6 +38,10 @@ int run_node_tests() {
     if (const int result = require(node.coordinates()[2] == 3.0); result != 0) {
         return result;
     }
+    if (const int result = require((std::is_same<decltype(node.coordinates()), const std::array<double, 3>&>::value));
+        result != 0) {
+        return result;
+    }
 
     return 0;
 }