Add json schema validation for config file

internal/config/config_test.go

@@ -0,0 +1,27 @@
+// Copyright (C) 2022 NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package config
+
+import (
+	"testing"
+
+	_ "github.com/santhosh-tekuri/jsonschema/v5/httploader"
+)
+
+func TestInit(t *testing.T) {
+	fp := "../../configs/config.json"
+	Init(fp)
+	if Keys.Addr != "0.0.0.0:443" {
+		t.Errorf("wrong addr\ngot: %s \nwant: 0.0.0.0:443", Keys.Addr)
+	}
+}
+
+func TestInitMinimal(t *testing.T) {
+	fp := "../../docs/config.json"
+	Init(fp)
+	if Keys.Addr != "0.0.0.0:8080" {
+		t.Errorf("wrong addr\ngot: %s \nwant: 0.0.0.0:8080", Keys.Addr)
+	}
+}