Did stuff

modules/core/src/main/scala/gs/graph/v0/SCC.scala

@@ -15,7 +15,7 @@ final class SCC private (val value: Set[Vertex]):
     */
   override def equals(obj: Any): Boolean =
     obj match
-      case other: SCC => value.iterator.sameElements(other.value)
+      case other: SCC => value.equals(other.value)
       case _          => false
 
   /** @inheritDocs

modules/core/src/test/scala/gs/graph/v0/TarjansTests.scala

@@ -60,4 +60,43 @@ class TarjansTests extends FunSuite:
     assertEquals(sccs.toSet, Set(SCC.of(0), SCC.of(1), SCC.of(2)))
   }
 
+  test("should handle a graph with multiple SCCs") {
+    val n = Size(9)
+
+    // Establish discrete cycles
+    // 0 -> 1 -> 2 -> 0
+    // 3 -> 4 -> 5 -> 3
+    // 6 -> 7 -> 8 -> 6
+    val g = Digraph.fromAdjacency(
+      Adjacency.fromEdges(
+        n,
+        List(
+          // Cycle 1
+          Edge(0, 1),
+          Edge(1, 2),
+          Edge(2, 0),
+          // Cycle 2
+          Edge(3, 4),
+          Edge(4, 5),
+          Edge(5, 3),
+          // Cycle 3
+          Edge(6, 7),
+          Edge(7, 8),
+          Edge(8, 6)
+        )
+      )
+    )
+
+    val sccs = SCC.findAll(g)
+    assertEquals(g.roots, Vector.empty)
+    assertEquals(
+      sccs.toSet,
+      Set(
+        SCC.of(0, 1, 2),
+        SCC.of(3, 4, 5),
+        SCC.of(6, 7, 8)
+      )
+    )
+  }
+
 end TarjansTests