github.com/coreos/mantle@v0.13.0/network/journal/record_test.go (about)

     1  // Copyright 2017 CoreOS, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package journal
    16  
    17  import (
    18  	"context"
    19  	"io"
    20  	"io/ioutil"
    21  	"strings"
    22  	"testing"
    23  	"time"
    24  
    25  	"github.com/coreos/mantle/network/mockssh"
    26  )
    27  
    28  const (
    29  	// cursor strings for exportText and exportBinary from export_test.go
    30  	cursorText   = "s=739ad463348b4ceca5a9e69c95a3c93f;i=4ece8;b=6c7c6013a26343b29e964691ff25d04c;m=4fc72572f;t=4c508a7243799;x=68597058a89b7246;p=system.journal"
    31  	cursorBinary = "s=bcce4fb8ffcb40e9a6e05eee8b7831bf;i=5ef603;b=ec25d6795f0645619ddac9afdef453ee;m=545242e7049;t=50f1202"
    32  
    33  	// commands the recorder should execute
    34  	journalBoot  = "journalctl --output=export --follow --lines=all --boot"
    35  	journalAfter = "journalctl --output=export --follow --lines=all --after-cursor " // + cursorText or cursorBinary
    36  )
    37  
    38  type nullFormatter struct{}
    39  
    40  func (n nullFormatter) SetTimezone(tz *time.Location) {}
    41  
    42  func (n nullFormatter) WriteEntry(entry Entry) error {
    43  	return nil
    44  }
    45  
    46  type discardCloser struct{}
    47  
    48  func (d discardCloser) Close() error {
    49  	return nil
    50  }
    51  
    52  func (d discardCloser) Write(b []byte) (int, error) {
    53  	return ioutil.Discard.Write(b)
    54  }
    55  
    56  // Escapes ; chars in cursor with \
    57  // May need tweaking if the shellquote library behavior ever changes.
    58  func journalAfterEsc(cursor string) string {
    59  	return journalAfter + strings.Replace(cursor, ";", "\\;", -1)
    60  }
    61  
    62  func TestRecorderSSH(t *testing.T) {
    63  	ctx := context.Background()
    64  	client := mockssh.NewMockClient(func(s *mockssh.Session) {
    65  		if s.Exec != journalBoot {
    66  			t.Errorf("got %q wanted %q", s.Exec, journalBoot)
    67  		}
    68  		if _, err := io.WriteString(s.Stdout, exportText); err != nil {
    69  			t.Error(err)
    70  		}
    71  		if err := s.Exit(0); err != nil {
    72  			t.Error(err)
    73  		}
    74  	})
    75  
    76  	recorder := NewRecorder(nullFormatter{}, discardCloser{})
    77  	if err := recorder.RunSSH(ctx, client); err != nil {
    78  		t.Fatal(err)
    79  	}
    80  
    81  	if recorder.cursor != cursorText {
    82  		t.Errorf("got %q wanted %q", recorder.cursor, cursorText)
    83  	}
    84  
    85  	client = mockssh.NewMockClient(func(s *mockssh.Session) {
    86  		cmd := journalAfterEsc(cursorText)
    87  		if s.Exec != cmd {
    88  			t.Errorf("got %q wanted %q", s.Exec, cmd)
    89  		}
    90  		if _, err := io.WriteString(s.Stdout, exportBinary); err != nil {
    91  			t.Error(err)
    92  		}
    93  		if err := s.Exit(0); err != nil {
    94  			t.Error(err)
    95  		}
    96  	})
    97  
    98  	if err := recorder.RunSSH(ctx, client); err != nil {
    99  		t.Fatal(err)
   100  	}
   101  
   102  	if recorder.cursor != cursorBinary {
   103  		t.Errorf("got %q wanted %q", recorder.cursor, cursorBinary)
   104  	}
   105  
   106  	client = mockssh.NewMockClient(func(s *mockssh.Session) {
   107  		cmd := journalAfterEsc(cursorBinary)
   108  		if s.Exec != cmd {
   109  			t.Errorf("got %q wanted %q", s.Exec, cmd)
   110  		}
   111  		if err := s.Close(); err != nil {
   112  			t.Error(err)
   113  		}
   114  	})
   115  
   116  	if err := recorder.RunSSH(ctx, client); err != nil {
   117  		t.Fatal(err)
   118  	}
   119  
   120  	if recorder.cursor != cursorBinary {
   121  		t.Errorf("got %q wanted %q", recorder.cursor, cursorBinary)
   122  	}
   123  }
   124  
   125  func TestRecorderSSHCancel(t *testing.T) {
   126  	ctx, cancel := context.WithCancel(context.Background())
   127  	client := mockssh.NewMockClient(func(s *mockssh.Session) {
   128  		// Skip close, let the connection hang.
   129  	})
   130  
   131  	recorder := NewRecorder(nullFormatter{}, discardCloser{})
   132  	if err := recorder.StartSSH(ctx, client); err != nil {
   133  		t.Fatal(err)
   134  	}
   135  
   136  	cancel()
   137  
   138  	if err := recorder.Wait(); err != nil {
   139  		t.Fatal(err)
   140  	}
   141  }