add more wheel graph tests!

tests/edu/caltech/cs2/project06/DSaturTests.java

@@ -157,12 +157,14 @@ public class DSaturTests {
         checkValidNColoring(g, K);
     }
 
-    @Test
     @Tag("B")
-    @DisplayName("Test DSatur on wheel graph (guaranteed optimal)")
-    public void testWheel() {
-        int K = 6;
-        NodeGraph g = new NodeGraph(K + 1);
+    @DisplayName("Test DSatur on various wheel graphs (guaranteed optimal)")
+    @ParameterizedTest(name = "Test DSatur on wheel graph with {0} vertices")
+    @CsvSource({"6","7","8","9","10","25","100","501","1000"})
+    public void testWheel(int T) {
+        // K is number of outer vertices
+        int K = T-1;
+        NodeGraph g = new NodeGraph(T);
         for (int i = 0; i < K + 1; i++) {
             g.addEdge(i % K, (i + 1) % K);
         }
@@ -171,7 +173,13 @@ public class DSaturTests {
         }
 
         DSatur.color(g);
-        checkValidNColoring(g, 3);
+        int maxColors;
+        if (K % 2 == 0){
+            maxColors = 3;
+        } else {
+            maxColors = 4;
+        }
+        checkValidNColoring(g, maxColors);
     }
 
     @Tag("B")