Commit f2b19a9

@@ -0,0 +1,5 @@
+package main
+
+func Add(x, y int) int {
+  return 4
+}

@@ -0,0 +1,13 @@
+package main
+
+import "testing"
+
+func TestAdder(t *testing.T) {
+  sum := Add(2, 2)
+  expected := 4
+
+  if sum != expected {
+    t.Errorf("expected '%d' but got '%d'", expected, sum)
+  }
+}
+