Extract asserts from Clone tests to be reusable

src/testing/graph_topology_addition_clone_testing.rs

@@ -1,3 +1,4 @@
+use crate::testing::fixtures;
 use crate::testing::fixtures::MakeTestGraph;
 use crate::traits::GraphTopologyAddition;
 
@@ -6,7 +7,7 @@ use crate::traits::GraphTopologyAddition;
 macro_rules! graph_topology_addition_clone_tests {
     ($T:ty) => {
         $crate::graph_topology_addition_clone_tests!(@wrap $T,
-            clone_independent,
+            clone_mutation_independent,
         );
     };
 
@@ -20,37 +21,8 @@ macro_rules! graph_topology_addition_clone_tests {
     };
 }
 
-pub fn clone_independent<G: Clone + GraphTopologyAddition>() {
-    let (mut graph, [u, v], _) = G::single_edge();
+pub fn clone_mutation_independent<G: Clone + GraphTopologyAddition>() {
+    let (mut graph, vertices, _) = G::single_edge();
     let mut clone = graph.clone();
-
-    let w = clone.add_vertex();
-    clone.add_edge(u, w);
-    assert_eq!(clone.vertex_count(), 3, "precondition: vertex count of clone");
-    assert_eq!(clone.edge_count(), 2, "precondition: edge count of clone");
-    assert_eq!(
-        graph.vertex_count(),
-        2,
-        "mutating the clone should not affect the vertex count of the original"
-    );
-    assert_eq!(
-        graph.edge_count(),
-        1,
-        "mutating the clone should not affect the edge count of the original"
-    );
-
-    let x = graph.add_vertex();
-    graph.add_edge(v, x);
-    assert_eq!(graph.vertex_count(), 3, "precondition: vertex count of original");
-    assert_eq!(graph.edge_count(), 2, "precondition: edge count of original");
-    assert_eq!(
-        clone.vertex_count(),
-        3,
-        "mutating the original should not affect the vertex count of the clone"
-    );
-    assert_eq!(
-        clone.edge_count(),
-        2,
-        "mutating the original should not affect the edge count of the clone"
-    );
+    fixtures::assert_mutation_independent(&mut graph, &mut clone, &vertices, |v| v);
 }