Add SSL check and test no redirect when HTTPS

Signed-off-by: Josh Michielsen <github@mickey.dev>

http_test.go

@@ -135,3 +135,24 @@ func TestRedirectToHTTPSFalse(t *testing.T) {
 
 	assert.Equal(t, http.StatusOK, rw.Code, "status code should be %d, got: %d", http.StatusOK, rw.Code)
 }
+
+func TestRedirectNotWhenHTTPS(t *testing.T) {
+	opts := NewOptions()
+	opts.ForceHTTPS = true
+	handler := func(w http.ResponseWriter, req *http.Request) {
+		w.Write([]byte("test"))
+	}
+
+	h := redirectToHTTPS(opts, http.HandlerFunc(handler))
+	s := httptest.NewTLSServer(h)
+	defer s.Close()
+
+	opts.HTTPSAddress = s.URL
+	client := s.Client()
+	res, err := client.Get(s.URL)
+	if err != nil {
+		t.Fatalf("request to test server failed with error: %v", err)
+	}
+
+	assert.Equal(t, http.StatusOK, res.StatusCode, "status code should be %d, got: %d", http.StatusOK, res.StatusCode)
+}