d44a8e0045
* Fix golang-ci linter errors Signed-off-by: z1cheng <imchench@gmail.com> * Fix gofmt errors Signed-off-by: z1cheng <imchench@gmail.com> * Add nolint comment to defaults.Backend in Configuration Signed-off-by: z1cheng <imchench@gmail.com> * Add #nosec comment to rand.New func Signed-off-by: z1cheng <imchench@gmail.com> * Fix errcheck warnings Signed-off-by: z1cheng <imchench@gmail.com> * Fix gofmt check Signed-off-by: z1cheng <imchench@gmail.com> * Fix unit tests and comments Signed-off-by: z1cheng <imchench@gmail.com> --------- Signed-off-by: z1cheng <imchench@gmail.com>
67 lines
1.6 KiB
Go
67 lines
1.6 KiB
Go
/*
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Copyright 2015 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package dns
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import (
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"net"
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"os"
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"testing"
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"k8s.io/ingress-nginx/pkg/util/file"
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)
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func TestGetDNSServers(t *testing.T) {
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s, err := GetSystemNameServers()
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if err != nil {
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t.Fatalf("unexpected error reading /etc/resolv.conf file: %v", err)
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}
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if len(s) < 1 {
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t.Error("expected at least 1 nameserver in /etc/resolv.conf")
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}
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f, err := os.CreateTemp("", "fw")
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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defer f.Close()
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defer os.Remove(f.Name())
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err = os.WriteFile(f.Name(), []byte(`
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# comment
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; comment
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nameserver 2001:4860:4860::8844
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nameserver 2001:4860:4860::8888
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nameserver 8.8.8.8
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`), file.ReadWriteByUser)
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if err != nil {
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t.Errorf("unexpected error: %v", err)
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}
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defResolvConf = f.Name()
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s, err = GetSystemNameServers()
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if err != nil {
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t.Fatalf("unexpected error reading /etc/resolv.conf file: %v", err)
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}
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if len(s) < 3 {
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t.Errorf("expected at 3 nameservers but %v returned", len(s))
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}
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eip := net.ParseIP("2001:4860:4860::8844")
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if !s[0].Equal(eip) {
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t.Errorf("expected %v as nameservers but %v returned", eip, s[0])
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}
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}
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