/*
Copyright 2019 The Kubernetes Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

package printers

import (
	"bytes"
	"testing"

	v1 "k8s.io/api/core/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/util/sets"
)

func TestPrinters(t *testing.T) {
	om := func(name string) metav1.ObjectMeta { return metav1.ObjectMeta{Name: name} }

	jsonpathPrinter, err := NewJSONPathPrinter("{.metadata.name}")
	if err != nil {
		t.Fatal(err)
	}

	objects := map[string]runtime.Object{
		"pod":             &v1.Pod{ObjectMeta: om("pod")},
		"emptyPodList":    &v1.PodList{},
		"nonEmptyPodList": &v1.PodList{Items: []v1.Pod{{}}},
		"endpoints": &v1.Endpoints{
			Subsets: []v1.EndpointSubset{{
				Addresses: []v1.EndpointAddress{{IP: "127.0.0.1"}, {IP: "localhost"}},
				Ports:     []v1.EndpointPort{{Port: 8080}},
			}}},
	}

	// Set of strings representing objects that should produce an error.
	expectedErrors := sets.NewString("emptyPodList", "nonEmptyPodList", "endpoints")

	for oName, obj := range objects {
		b := &bytes.Buffer{}
		if err := jsonpathPrinter.PrintObj(obj, b); err != nil {
			if expectedErrors.Has(oName) {
				// expected error
				continue
			}
			t.Errorf("JSONPathPrinter error object '%v'; error: '%v'", oName, err)
		}
	}

	// rerun tests with JSONOutput enabled
	jsonpathPrinter.EnableJSONOutput(true)

	for oName, obj := range objects {
		b := &bytes.Buffer{}
		if err := jsonpathPrinter.PrintObj(obj, b); err != nil {
			if expectedErrors.Has(oName) {
				// expected error
				continue
			}
			t.Errorf("JSONPathPrinter jsonOutput error object '%v'; error: '%v'", oName, err)
		}
	}
}