/*
   Copyright The containerd 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.
*/

/*
 *
 * Copyright 2017 gRPC 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 codes

import (
	"encoding/json"
	"reflect"
	"testing"

	cpb "google.golang.org/genproto/googleapis/rpc/code"
)

func TestUnmarshalJSON(t *testing.T) {
	for s, v := range cpb.Code_value {
		want := Code(v)
		var got Code
		if err := got.UnmarshalJSON([]byte(`"` + s + `"`)); err != nil || got != want {
			t.Errorf("got.UnmarshalJSON(%q) = %v; want <nil>.  got=%v; want %v", s, err, got, want)
		}
	}
}

func TestJSONUnmarshal(t *testing.T) {
	var got []Code
	want := []Code{OK, NotFound, Internal, Canceled}
	in := `["OK", "NOT_FOUND", "INTERNAL", "CANCELLED"]`
	err := json.Unmarshal([]byte(in), &got)
	if err != nil || !reflect.DeepEqual(got, want) {
		t.Fatalf("json.Unmarshal(%q, &got) = %v; want <nil>.  got=%v; want %v", in, err, got, want)
	}
}

func TestUnmarshalJSON_NilReceiver(t *testing.T) {
	var got *Code
	in := OK.String()
	if err := got.UnmarshalJSON([]byte(in)); err == nil {
		t.Errorf("got.UnmarshalJSON(%q) = nil; want <non-nil>.  got=%v", in, got)
	}
}

func TestUnmarshalJSON_UnknownInput(t *testing.T) {
	var got Code
	for _, in := range [][]byte{[]byte(""), []byte("xxx"), []byte("Code(17)"), nil} {
		if err := got.UnmarshalJSON([]byte(in)); err == nil {
			t.Errorf("got.UnmarshalJSON(%q) = nil; want <non-nil>.  got=%v", in, got)
		}
	}
}

func TestUnmarshalJSON_MarshalUnmarshal(t *testing.T) {
	for i := 0; i < _maxCode; i++ {
		var cUnMarshaled Code
		c := Code(i)

		cJSON, err := json.Marshal(c)
		if err != nil {
			t.Errorf("marshalling %q failed: %v", c, err)
		}

		if err := json.Unmarshal(cJSON, &cUnMarshaled); err != nil {
			t.Errorf("unmarshalling code failed: %s", err)
		}

		if c != cUnMarshaled {
			t.Errorf("code is %q after marshalling/unmarshalling, expected %q", cUnMarshaled, c)
		}
	}
}