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// 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"
"reflect"
"testing"
"github.com/coreos/coreos-cloudinit/config"
"github.com/coreos/coreos-cloudinit/datasource"
)
func TestMergeConfigs(t *testing.T) {
tests := []struct {
cc *config.CloudConfig
md datasource.Metadata
out config.CloudConfig
}{
{
// If md is empty and cc is nil, result should be empty
out: config.CloudConfig{},
},
{
// If md and cc are empty, result should be empty
cc: &config.CloudConfig{},
out: config.CloudConfig{},
},
{
// If cc is empty, cc should be returned unchanged
cc: &config.CloudConfig{SSHAuthorizedKeys: []string{"abc", "def"}, Hostname: "cc-host"},
out: config.CloudConfig{SSHAuthorizedKeys: []string{"abc", "def"}, Hostname: "cc-host"},
},
{
// If cc is empty, cc should be returned unchanged(overridden)
cc: &config.CloudConfig{},
md: datasource.Metadata{Hostname: "md-host", SSHPublicKeys: map[string]string{"key": "ghi"}},
out: config.CloudConfig{SSHAuthorizedKeys: []string{"ghi"}, Hostname: "md-host"},
},
{
// If cc is nil, cc should be returned unchanged(overridden)
md: datasource.Metadata{Hostname: "md-host", SSHPublicKeys: map[string]string{"key": "ghi"}},
out: config.CloudConfig{SSHAuthorizedKeys: []string{"ghi"}, Hostname: "md-host"},
},
{
// user-data should override completely in the case of conflicts
cc: &config.CloudConfig{SSHAuthorizedKeys: []string{"abc", "def"}, Hostname: "cc-host"},
md: datasource.Metadata{Hostname: "md-host"},
out: config.CloudConfig{SSHAuthorizedKeys: []string{"abc", "def"}, Hostname: "cc-host"},
},
{
// Mixed merge should succeed
cc: &config.CloudConfig{SSHAuthorizedKeys: []string{"abc", "def"}, Hostname: "cc-host"},
md: datasource.Metadata{Hostname: "md-host", SSHPublicKeys: map[string]string{"key": "ghi"}},
out: config.CloudConfig{SSHAuthorizedKeys: []string{"abc", "def", "ghi"}, Hostname: "cc-host"},
},
{
// Completely non-conflicting merge should be fine
cc: &config.CloudConfig{Hostname: "cc-host"},
md: datasource.Metadata{SSHPublicKeys: map[string]string{"zaphod": "beeblebrox"}},
out: config.CloudConfig{Hostname: "cc-host", SSHAuthorizedKeys: []string{"beeblebrox"}},
},
{
// Non-mergeable settings in user-data should not be affected
cc: &config.CloudConfig{Hostname: "cc-host", ManageEtcHosts: config.EtcHosts("lolz")},
md: datasource.Metadata{Hostname: "md-host"},
out: config.CloudConfig{Hostname: "cc-host", ManageEtcHosts: config.EtcHosts("lolz")},
},
}
for i, tt := range tests {
out := mergeConfigs(tt.cc, tt.md)
if !reflect.DeepEqual(tt.out, out) {
t.Errorf("bad config (%d): want %#v, got %#v", i, tt.out, out)
}
}
}
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)
}
}
}