fix lint.

Author: yseto

check-dns/lib/check_dns_test.go

@@ -13,12 +13,12 @@ import (
 func TestNameServer(t *testing.T) {
 	nameserver, err := adapterAddress()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err)
 	}
-	t.Logf(nameserver)
+	t.Log(nameserver)
 	address := net.ParseIP(nameserver)
 	if address == nil {
-		t.Errorf("nameserver is invalid IP")
+		t.Error("nameserver is invalid IP")
 	}
 }
 

check-log/lib/check-log.go

@@ -290,7 +290,7 @@ func (opts *logOpts) searchLog(ctx context.Context, logFile string) (int64, int6
 	if opts.Encoding != "" {
 		e := encoding.GetEncoding(opts.Encoding)
 		if e == nil {
-			return 0, 0, "", fmt.Errorf("unknown encoding:" + opts.Encoding)
+			return 0, 0, "", fmt.Errorf("unknown encoding: %s", opts.Encoding)
 		}
 		opts.decoder = e.NewDecoder()
 	}
@@ -447,7 +447,7 @@ func parseFilePattern(directory, filePattern string, caseInsensitive bool) ([]st
 
 	fileInfos, err := os.ReadDir(dirStr)
 	if err != nil {
-		return nil, fmt.Errorf("cannot read the directory:" + err.Error())
+		return nil, fmt.Errorf("cannot read the directory: %s", err.Error())
 	}
 
 	var fileList []string

check-smtp/lib/check-smtp_test.go

@@ -39,7 +39,7 @@ func (m *mockSMTPServer) runServe() error {
 		tc := textproto.NewConn(conn)
 
 		for _, res := range m.responses {
-			if err := tc.PrintfLine(res); err != nil {
+			if err := tc.PrintfLine(res); err != nil { // nolint
 				errCh <- err
 				return
 			}