Add test coverage

[markwragg]

Currently we only test against the PS Script Analyzer rules. Need to add unit testing for the code.

[markwragg]

Added tests for private functions, coverage now 17%.

[markwragg]

Added tests for Invoke-Lumos, now at 45%.

[markwragg]

Missed commands:

Private\Set-Wallpaper.ps1                    Set-Wallpaper                 34 $SendChangeEvent = 0x02                  
Private\Set-Wallpaper.ps1                    Set-Wallpaper                 36 $fWinIni = $UpdateIniFile -bor $SendCh...
Private\Set-Wallpaper.ps1                    Set-Wallpaper                 38 if ($PSCmdlet.ShouldProcess($Image)) {...
Private\Set-Wallpaper.ps1                    Set-Wallpaper                 39 [void][Params]::SystemParametersInfo($...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                  90 $Lumos = 'Undefined'                     
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 108 $Lumos = 0                               
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 122 $Status = 'Undefined'                    
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 128 if ($Lumos -eq 0) {...                   
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 129 'tell application \"System Events\" to...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 131 if ($Lumos -eq 0) {...                   
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 132 'tell application \"System Events\" to...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 135 'tell application \"System Events\" to...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 138 Invoke-AppleScript -Command $MacCommand  
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 140 if ($ExcludeSystem) {...                 
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 141 Write-Error '-ExcludeSystem is not cur...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 144 if ($ExcludeApps) {...                   
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 145 Write-Error '-ExcludeApps is not curre...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 148 if ($IncludeOfficeProPlus) {...          
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 149 Write-Error '-OfficeProPlus is not cur...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 152 if ($Wallpaper) {...                     
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 153 $MacCommand = "tell application \`"Sys...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 154 Invoke-AppleScript -Command $MacCommand  
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 159 Throw 'Linux is not currently supporte...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 176 if ($Lumos -eq 0) { ...                  
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 177 4                                        
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 179 if (Test-Path "HKLM:\SOFTWARE\Microsof...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 180 5                                        
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 182 0                                        
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 182 0                                        
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 186 Write-Verbose "Setting OfficeProPlus t...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 188 Set-ItemProperty -Path $OfficeThemeReg...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 190 Get-ChildItem -Path ($OfficeThemeRegKe...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 190 $OfficeThemeRegKey + "\Roaming\Identit...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 190 ForEach-Object {...                      
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 191 $identityPath = ($_.Name.Replace('HKEY...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 191 $_.Name.Replace('HKEY_CURRENT_USER', '...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 193 if (Get-ItemProperty -Path $identityPa...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 194 Write-Verbose 'Active identity path fo...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 196 Set-ItemProperty -Path $identityPath -...
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 196 [byte[]]($proPlusThemeValue, 0, 0, 0)    
Public\Invoke-Lumos.ps1                      Invoke-Lumos                 196 $proPlusThemeValue, 0, 0, 0              
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   50 $ArgumentDefaults = '-NoProfile -Execu...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   52 $LumosArgument = "$ArgumentDefaults -C...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   54 If ($ExcludeSystem) {...                 
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   55 $LumosArgument = $LumosArgument + " -E...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   57 If ($ExcludeApps) {...                   
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   58 $LumosArgument = $LumosArgument + " -E...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   60 If ($IncludeOfficeProPlus) {...          
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   61 $LumosArgument = $LumosArgument + " -I...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   63 If ($LightWallpaper) {...                
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   64 $LumosArgument = $LumosArgument + " -L...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   66 If ($DarkWallpaper) {...                 
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   67 $LumosArgument = $LumosArgument + " -D...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   71 $adminSid = [System.Security.Principal...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   72 $adminSecId = New-Object System.Securi...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   72 $adminSid, $null                         
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   73 $localizedAdminGroup = $adminSecId.Tra...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   75 $LumosAction = New-ScheduledTaskAction...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   76 $UpdateAction = New-ScheduledTaskActio...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   77 $Principal = New-ScheduledTaskPrincipa...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   78 $TaskSettings = New-ScheduledTaskSetti...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   80 New-ScheduledTask -Action $LumosAction...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   80 Register-ScheduledTask -TaskName 'Lumo...
Public\Register-LumosScheduledTask.ps1       Register-LumosScheduledTask   83 Update-LumosScheduledTask                
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     21 $UserLocation = Get-UserLocation         
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     23 if ($UserLocation) {...                  
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     24 $DayLight = Get-LocalDaylight -Latitud...
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     27 Throw 'Could not get sunrise/sunset da...
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     30 $SunriseTrigger = New-ScheduledTaskTri...
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     31 $SunsetTrigger = New-ScheduledTaskTrig...
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     32 $LogonTrigger = New-ScheduledTaskTrigg...
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     34 if ($PSCmdlet.ShouldProcess('Update Lu...
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     35 Set-ScheduledTask -TaskName 'Lumos' -T...
Public\Update-LumosScheduledTask.ps1         Update-LumosScheduledTask     36 Stop-Process -ProcessName explorer