Added a few little tests

caddy/letsencrypt/storage_test.go

@@ -76,6 +76,10 @@ func TestEmailUsername(t *testing.T) {
 			input:  emptyEmail,
 			expect: emptyEmail,
 		},
+		{
+			input:  "",
+			expect: "",
+		},
 	} {
 		if actual := emailUsername(test.input); actual != test.expect {
 			t.Errorf("Test %d: Expected username to be '%s' but was '%s'", i, test.expect, actual)

server/config_test.go

+package server
+
+import "testing"
+
+func TestConfigAddress(t *testing.T) {
+	cfg := Config{Host: "foobar", Port: "1234"}
+	if actual, expected := cfg.Address(), "foobar:1234"; expected != actual {
+		t.Errorf("Expected '%s' but got '%s'", expected, actual)
+	}
+
+	cfg = Config{Host: "", Port: "1234"}
+	if actual, expected := cfg.Address(), ":1234"; expected != actual {
+		t.Errorf("Expected '%s' but got '%s'", expected, actual)
+	}
+
+	cfg = Config{Host: "foobar", Port: ""}
+	if actual, expected := cfg.Address(), "foobar:"; expected != actual {
+		t.Errorf("Expected '%s' but got '%s'", expected, actual)
+	}
+
+	cfg = Config{Host: "::1", Port: "https"}
+	if actual, expected := cfg.Address(), "[::1]:https"; expected != actual {
+		t.Errorf("Expected '%s' but got '%s'", expected, actual)
+	}
+}