github.com/hugh712/snapd@v0.0.0-20200910133618-1a99902bd583/overlord/patch/patch2_test.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2016 Canonical Ltd
     5   *
     6   * This program is free software: you can redistribute it and/or modify
     7   * it under the terms of the GNU General Public License version 3 as
     8   * published by the Free Software Foundation.
     9   *
    10   * This program is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU General Public License
    16   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17   *
    18   */
    19  
    20  package patch_test
    21  
    22  import (
    23  	"io/ioutil"
    24  	"os"
    25  	"path/filepath"
    26  
    27  	. "gopkg.in/check.v1"
    28  
    29  	"github.com/snapcore/snapd/dirs"
    30  	"github.com/snapcore/snapd/overlord/patch"
    31  	"github.com/snapcore/snapd/overlord/snapstate"
    32  	"github.com/snapcore/snapd/overlord/state"
    33  	"github.com/snapcore/snapd/snap"
    34  )
    35  
    36  type patch2Suite struct{}
    37  
    38  var _ = Suite(&patch2Suite{})
    39  
    40  var statePatch2JSON = []byte(`
    41  {
    42  	"data": {
    43  		"patch-level": 1,
    44  		"snaps": {
    45  			"foo": {
    46  				"sequence": [{
    47  					"name": "",
    48  					"revision": "x1"
    49  				}, {
    50  					"name": "",
    51  					"revision": "x2"
    52  				}],
    53  				"current": "x2"
    54  			},
    55  			"bar": {
    56  				"candidate": {
    57  					"name": "",
    58  					"revision": "x1",
    59  					"snapid": "mysnapid"
    60  				}
    61  			}
    62  		}
    63  	},
    64  	"changes": {
    65  		"1": {
    66  			"id": "1",
    67  			"kind": "some-change",
    68  			"summary": "summary-1",
    69  			"status": 0,
    70  			"task-ids": ["1"]
    71  		},
    72  		"2": {
    73  			"id": "2",
    74  			"kind": "some-other-change",
    75  			"summary": "summary-2",
    76  			"status": 0,
    77  			"task-ids": ["2"]
    78  		}
    79  	},
    80  	"tasks": {
    81  		"1": {
    82  			"id": "1",
    83  			"kind": "something",
    84  			"summary": "meep",
    85  			"status": 4,
    86  			"data": {
    87  				"snap-setup": {
    88  					"name": "foo",
    89  					"revision": "x3"
    90  				}
    91  			},
    92  			"halt-tasks": [
    93  				"7"
    94  			],
    95  			"change": "1"
    96  		},
    97  		"2": {
    98  			"id": "2",
    99  			"kind": "something-else",
   100  			"summary": "meep",
   101  			"status": 4,
   102  			"data": {
   103  				"snap-setup": {
   104  					"name": "bar",
   105  					"revision": "26"
   106  				}
   107  			},
   108  			"halt-tasks": [
   109  				"3"
   110  			],
   111  			"change": "2"
   112  		}
   113  	}
   114  }
   115  `)
   116  
   117  func (s *patch2Suite) SetUpTest(c *C) {
   118  	dirs.SetRootDir(c.MkDir())
   119  
   120  	err := os.MkdirAll(filepath.Dir(dirs.SnapStateFile), 0755)
   121  	c.Assert(err, IsNil)
   122  	err = ioutil.WriteFile(dirs.SnapStateFile, statePatch2JSON, 0644)
   123  	c.Assert(err, IsNil)
   124  }
   125  
   126  func (s *patch2Suite) TestPatch2(c *C) {
   127  	restorer := patch.MockLevel(2, 1)
   128  	defer restorer()
   129  
   130  	r, err := os.Open(dirs.SnapStateFile)
   131  	c.Assert(err, IsNil)
   132  	defer r.Close()
   133  	st, err := state.ReadState(nil, r)
   134  	c.Assert(err, IsNil)
   135  
   136  	// go from patch level 1 -> 2
   137  	err = patch.Apply(st)
   138  	c.Assert(err, IsNil)
   139  
   140  	st.Lock()
   141  	defer st.Unlock()
   142  
   143  	// our mocks are correct
   144  	c.Assert(st.Changes(), HasLen, 2)
   145  	c.Assert(st.Tasks(), HasLen, 2)
   146  
   147  	var snapsup snapstate.SnapSetup
   148  	// transition of:
   149  	// - SnapSetup.{Name,Revision} -> SnapSetup.SideInfo.{RealName,Revision}
   150  	t := st.Task("1")
   151  	err = t.Get("snap-setup", &snapsup)
   152  	c.Assert(err, IsNil)
   153  	c.Assert(snapsup.SideInfo, DeepEquals, &snap.SideInfo{
   154  		RealName: "foo",
   155  		Revision: snap.R("x3"),
   156  	})
   157  
   158  	// transition of:
   159  	// - SnapState.Sequence is backfilled with "RealName" (if missing)
   160  	var snapst snapstate.SnapState
   161  	err = snapstate.Get(st, "foo", &snapst)
   162  	c.Assert(err, IsNil)
   163  	c.Check(snapst.Sequence[0].RealName, Equals, "foo")
   164  	c.Check(snapst.Sequence[1].RealName, Equals, "foo")
   165  
   166  	// transition of:
   167  	// - Candidate for "bar" -> tasks SnapSetup.SideInfo
   168  	t = st.Task("2")
   169  	err = t.Get("snap-setup", &snapsup)
   170  	c.Assert(err, IsNil)
   171  	c.Assert(snapsup.SideInfo, DeepEquals, &snap.SideInfo{
   172  		RealName: "bar",
   173  		Revision: snap.R("x1"),
   174  	})
   175  
   176  	// FIXME: bar is now empty and should no longer be there?
   177  	err = snapstate.Get(st, "bar", &snapst)
   178  	c.Assert(err, IsNil)
   179  }