first working build

pkg/banner/banner.go

@@ -0,0 +1,5 @@
+package banner
+
+func Banner() string {
+    return "KAPOW!!!"
+}

pkg/banner/banner_test.go

@@ -0,0 +1,11 @@
+package banner
+
+import "testing"
+
+func TestBanner(t *testing.T) {
+    ban := Banner()
+    if ban != "KAPOW!!!" {
+        t.Errorf("Banner expected KAPOW!!!, but got %v", ban)
+        t.Fail()
+    }
+}