Create a test file for each of the koan modules

test/koans/equalities_koan_test.exs

@@ -0,0 +1,18 @@
+defmodule EqualitiesTests do
+  use ExUnit.Case
+  use TestHarness
+
+  test "Equalities" do
+    answers = [
+      true,
+      false,
+      1,
+      2,
+      1,
+      4,
+      2
+    ]
+
+    test_all(Equalities, answers)
+  end
+end