refactored the supporting file list that gets copied so it can be tested

.vscode/spellright.dict

@@ -27,3 +27,4 @@ intellisense
 PivtoTableName
 New-Excelchart
 paypal
+dll

InstallModule.ps1

@@ -18,48 +18,7 @@ Begin {
     Try {
         Write-Verbose "$ModuleName module installation started"
 
-        $Files = @(
-            '*.dll',
-            '*.psd1',
-            '*.psm1',
-            'AddConditionalFormatting.ps1',
-            'Charting.ps1',
-            'ColorCompletion.ps1',
-            'Compare-Worksheet.ps1',
-            'ConvertFromExcelData.ps1',
-            'ConvertFromExcelToSQLInsert.ps1',
-            'ConvertExcelToImageFile.ps1',
-            'ConvertToExcelXlsx.ps1',
-            'Copy-ExcelWorkSheet.ps1',
-            'Export-Charts.ps1',
-            'Export-Excel.ps1',
-            'Export-ExcelSheet.ps1',
-            'Get-ExcelColumnName.ps1',
-            'Get-ExcelSheetInfo.ps1',
-            'Get-ExcelWorkbookInfo.ps1',
-            'Get-HtmlTable.ps1',
-            'Get-Range.ps1',
-            'Get-XYRange.ps1',
-            'Import-Html.ps1',
-            'InferData.ps1',
-            'Invoke-Sum.ps1',
-            'Join-Worksheet.ps1',
-            'Merge-Worksheet.ps1',
-            'New-ConditionalFormattingIconSet.ps1',
-            'New-ConditionalText.ps1',
-            'New-ExcelChart.ps1',
-            'New-PSItem.ps1',
-            'Open-ExcelPackage.ps1',
-            'Pivot.ps1',
-            'Plot.ps1',
-            'Send-SQLDataToExcel.ps1',
-            'Set-CellStyle.ps1',
-            'Set-Column.ps1',
-            'Set-Row.ps1',
-            'SetFormat.ps1',
-            'TrackingUtils.ps1',
-            'Update-FirstObjectProperties.ps1'
-        )
+        $Files = Get-Content $PSScriptRoot\filelist.txt
     }
     Catch {
         throw "Failed installing the module '$ModuleName': $_"

__tests__/ImportExcelFileList.tests.ps1

@@ -0,0 +1,10 @@
+Describe "ImportExcel File List" {
+    It "All files should exist" {
+        $fileList = Get-Content "$PSScriptRoot\..\filelist.txt"
+
+        foreach ($file in $fileList) {
+            $targetFile = "$PSScriptRoot\..\$file"
+            Test-Path $targetFile | Should Be $true
+        }
+    }
+}

filelist.txt

@@ -0,0 +1,40 @@
+*.dll
+*.psd1
+*.psm1
+AddConditionalFormatting.ps1
+Charting.ps1
+ColorCompletion.ps1
+Compare-Worksheet.ps1
+ConvertFromExcelData.ps1
+ConvertFromExcelToSQLInsert.ps1
+ConvertExcelToImageFile.ps1
+ConvertToExcelXlsx.ps1
+Copy-ExcelWorkSheet.ps1
+Export-Charts.ps1
+Export-Excel.ps1
+Export-ExcelSheet.ps1
+Get-ExcelColumnName.ps1
+Get-ExcelSheetInfo.ps1
+Get-ExcelWorkbookInfo.ps1
+Get-HtmlTable.ps1
+Get-Range.ps1
+Get-XYRange.ps1
+Import-Html.ps1
+InferData.ps1
+Invoke-Sum.ps1
+Join-Worksheet.ps1
+Merge-Worksheet.ps1
+New-ConditionalFormattingIconSet.ps1
+New-ConditionalText.ps1
+New-ExcelChart.ps1
+New-PSItem.ps1
+Open-ExcelPackage.ps1
+Pivot.ps1
+Plot.ps1
+Send-SQLDataToExcel.ps1
+Set-CellStyle.ps1
+Set-Column.ps1
+Set-Row.ps1
+SetFormat.ps1
+TrackingUtils.ps1
+Update-FirstObjectProperties.ps1