Update test assertions in main()

src/main.rs

@@ -165,41 +165,38 @@ fn main() {
     graph.add_edge(vertices[7], vertices[8]);
     graph.add_edge(vertices[7], vertices[9]);
 
-    assert_eq!(graph.vertex_count(), 10, "vertex count");
-    assert_eq!(graph.edge_count(), 14, "edge count");
+    assert_eq!(graph.vertex_count(), 10, "unexpected vertex count");
+    assert_eq!(graph.edge_count(), 14, "unexpected edge count");
     let expected_degrees = [1, 4, 4, 2, 4, 2, 3, 3, 2, 3];
     for i in 0..graph.vertex_count() {
         assert_eq!(
             graph.degree(vertices[i]),
             expected_degrees[i],
-            "degree of {:?}",
+            "unexpected degree of {:?}",
             vertices[i]
         );
     }
 
-    assert_eq!(
+    assert!(
         graph.are_adjacent(vertices[0], vertices[1]),
-        true,
-        "adjacency of {:?} and {:?}",
+        "expected {:?} and {:?} to be adjacent",
         vertices[0],
         vertices[1]
     );
-    assert_eq!(
+    assert!(
         graph.are_adjacent(vertices[9], vertices[5]),
-        true,
-        "adjacency of {:?} and {:?}",
+        "expected {:?} and {:?} to be adjacent",
         vertices[0],
         vertices[5]
     );
-    assert_eq!(
-        graph.are_adjacent(vertices[9], vertices[3]),
-        false,
-        "adjacency of {:?} and {:?}",
+    assert!(
+        !graph.are_adjacent(vertices[9], vertices[3]),
+        "unexpected adjacency of {:?} and {:?}",
         vertices[9],
         vertices[3]
     );
 
-    for i in 0..vertices.len() {
+    for i in 0..graph.vertex_count() {
         let exp = match i {
             2 => continue,
             1 | 4 | 5 | 6 => true,
@@ -208,14 +205,14 @@ fn main() {
         assert_eq!(
             graph.are_adjacent(vertices[2], vertices[i]),
             exp,
-            "adjacency of {:?} and {:?}",
+            "unexpected adjacency of {:?} and {:?}",
             vertices[2],
             vertices[i]
         );
         assert_eq!(
             graph.are_adjacent(vertices[i], vertices[2]),
             exp,
-            "adjacency of {:?} and {:?}",
+            "unexpected adjacency of {:?} and {:?}",
             vertices[i],
             vertices[2]
         );