reset, save

- removed 'lock' test, corrected README example
- can now test 'save', 'reset', 'load'

prelim test for potato passes

tests/higher.Tests.ps1

@@ -184,12 +184,6 @@ Describe -Tag 'higher', -TestName 'All Higher Tests' {
             }
         }
 
-        Context 'Command' {
-            It 'Should set command.lock' {
-                $vmr.command.lock = $value
-            }
-        }
-
         Context 'Fx' -Skip:$ifNotPotato {
             Context 'Delay' {
                 It 'Should set and get Fx.delay.on' {
@@ -948,6 +942,51 @@ Describe -Tag 'higher', -TestName 'All Higher Tests' {
                 }
             }
         }
+
+        Context 'Command' {
+            It 'Should save, reset, then load config' -ForEach @(
+                @{ Gain = -27.1; Mode = 'composite'; Bit = 24; Port = 1044 }
+            ) {
+                $tmp = [System.IO.Path]::Combine([System.IO.Path]::GetTempPath(), "vmrconfig-$(New-Guid).xml")
+                try {
+                    # set some values
+                    $vmr.strip[$virt_in].gain = $gain
+                    $vmr.bus[$phys_out].mode.set($mode)
+                    $vmr.vban.outstream[$vban_outA].bit = $bit
+                    $vmr.vban.port = $port
+
+                    # save config
+                    $vmr.command.save($tmp)
+                    Start-Sleep -Milliseconds 100
+                    Test-Path $tmp | Should -BeTrue
+
+                    # reset config
+                    $vmr.command.reset()
+                    Start-Sleep -Milliseconds 500
+
+                    # verify default values
+                    $vmr.strip[$virt_in].gain | Should -Be 0.0
+                    $vmr.bus[$phys_out].mode.get() | Should -Be 'normal'
+                    $vmr.vban.outstream[$vban_outA].bit | Should -Be 16
+                    $vmr.vban.port | Should -Be 6980
+
+                    # load config
+                    $vmr.command.load($tmp)
+                    Start-Sleep -Milliseconds 500
+
+                    # verify values
+                    $vmr.strip[$virt_in].gain | Should -Be $gain
+                    $vmr.bus[$phys_out].mode.get() | Should -Be $mode
+                    $vmr.vban.outstream[$vban_outA].bit | Should -Be $bit
+                    $vmr.vban.port | Should -Be $port
+                }
+                finally {
+                    if (Test-Path $tmp) {
+                        Remove-Item $tmp -Force
+                    }
+                }
+            }
+        }
     }
 
     Describe 'Action Tests' -Tag 'action' {