coreos-cloudinit_test.go

// Copyright 2015 CoreOS, Inc.
//
// 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 main

import (
	"bytes"
	"encoding/base64"
	"errors"
	"testing"
)

func mustDecode(in string) []byte {
	out, err := base64.StdEncoding.DecodeString(in)
	if err != nil {
		panic(err)
	}
	return out
}

func TestDecompressIfGzip(t *testing.T) {
	tests := []struct {
		in []byte

		out []byte
		err error
	}{
		{
			in: nil,

			out: nil,
			err: nil,
		},
		{
			in: []byte{},

			out: []byte{},
			err: nil,
		},
		{
			in: mustDecode("H4sIAJWV/VUAA1NOzskvTdFNzs9Ly0wHABt6mQENAAAA"),

			out: []byte("#cloud-config"),
			err: nil,
		},
		{
			in: []byte("#cloud-config"),

			out: []byte("#cloud-config"),
			err: nil,
		},
		{
			in: mustDecode("H4sCORRUPT=="),

			out: nil,
			err: errors.New("any error"),
		},
	}
	for i, tt := range tests {
		out, err := decompressIfGzip(tt.in)
		if !bytes.Equal(out, tt.out) || (tt.err != nil && err == nil) {
			t.Errorf("bad gzip (%d): want (%s, %#v), got (%s, %#v)", i, string(tt.out), tt.err, string(out), err)
		}
	}

}