github.com/hugh712/snapd@v0.0.0-20200910133618-1a99902bd583/boot/boottest/device.go (about)

     1  // -*- Mode: Go; indent-tabs-mode: t -*-
     2  
     3  /*
     4   * Copyright (C) 2014-2019 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 boottest
    21  
    22  import (
    23  	"strings"
    24  
    25  	"github.com/snapcore/snapd/boot"
    26  )
    27  
    28  type mockDevice struct {
    29  	bootSnap string
    30  	mode     string
    31  	uc20     bool
    32  }
    33  
    34  // MockDevice implements boot.Device. It wraps a string like
    35  // <boot-snap-name>[@<mode>], no <boot-snap-name> means classic, no
    36  // <mode> defaults to "run". It returns <boot-snap-name> for both
    37  // Base and Kernel, for more control mock a DeviceContext.
    38  func MockDevice(s string) boot.Device {
    39  	bootsnap, mode := snapAndMode(s)
    40  	return &mockDevice{
    41  		bootSnap: bootsnap,
    42  		mode:     mode,
    43  	}
    44  }
    45  
    46  // MockUC20Device implements boot.Device and returns true for HasModeenv.
    47  func MockUC20Device(s string) boot.Device {
    48  	m := MockDevice(s).(*mockDevice)
    49  	m.uc20 = true
    50  	return m
    51  }
    52  
    53  func snapAndMode(str string) (snap, mode string) {
    54  	parts := strings.SplitN(string(str), "@", 2)
    55  	if len(parts) == 1 || parts[1] == "" {
    56  		return parts[0], "run"
    57  	}
    58  	return parts[0], parts[1]
    59  }
    60  
    61  func (d *mockDevice) Kernel() string   { return d.bootSnap }
    62  func (d *mockDevice) Base() string     { return d.bootSnap }
    63  func (d *mockDevice) Classic() bool    { return d.bootSnap == "" }
    64  func (d *mockDevice) RunMode() bool    { return d.mode == "run" }
    65  func (d *mockDevice) HasModeenv() bool { return d.uc20 }