tests completed for all interaction between types

src/test/scala/Test.scala

@@ -4,9 +4,17 @@ import org.scalatest.funsuite.AnyFunSuite
 class StackSpec extends AnyFunSuite:
 
     test("Strong type should have increased damage multiplicator") {
-        assert(Fire.typeEfficiency(Grass) == 2)
+        assert(Fire.typeEfficiency(Grass).fatcor == 2.0)
     }
 
     test("Weak type should have decreased damage multiplicator") {
-        assert(Fire.computeMultiplier(Water) == 0.5)
+        assert(Bug.typeEfficiency(Fight).factor == 0.5)
+    }
+
+    test("Common type should have neutral damage multiplicator") {
+        assert(Electric.typeEfficiency(Poison).factor == 1.0)
+    }
+
+    test("Inefficient type should have null damage multiplicator") {
+        assert(Normal.typeEfficiency(Ghost).factor == 0.0)
     }