chore: update examples

examples/src/dijkstra.rs

@@ -1,6 +1,6 @@
 use graph_algorithms::{Dijkstra, GraphAlgorithm};
 
-pub fn run() {
+pub fn run() -> Vec<usize> {
     let mut dijkstra = Dijkstra::new();
     dijkstra.set_nodes(vec![
         (0, vec![(1, 1), (2, 4)]),
@@ -10,5 +10,15 @@ pub fn run() {
 
     let result = dijkstra.run(0);
 
-    println!("{:?}", result);
+    return result;
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_dijkstra() {
+        assert_eq!(run(), vec![0, 1, 3]);
+    }
 }

examples/src/main.rs

@@ -4,3 +4,14 @@ fn main() {
     // Run the Dijkstra example
     dijkstra::run();
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_main() {
+        // Just test that the main function runs without panicking
+        main();
+    }
+}