Merge pull request #835 from scrthq:hotfix/issue_832

fixes #832

CI/CI.ps1

@@ -13,7 +13,10 @@ param
     # AppVeyor and Azure - Upload module as AppVeyor Artifact.
     [Switch]$Artifact,
     # Azure - Runs PsScriptAnalyzer against one or more folders and pivots the results to form a report.
-    [Switch]$Analyzer
+    [Switch]$Analyzer,
+    # Installs the module and invokes only the ModuleImport test.
+    # Used for validating that the module imports still when external dependencies are missing, e.g. mono-libgdiplus on macOS.
+    [Switch]$TestImportOnly
 )
 $ErrorActionPreference = 'Stop'
 if ($Initialize) {
@@ -21,7 +24,7 @@ if ($Initialize) {
     $ModuleVersion = (. ([Scriptblock]::Create((Get-Content -Path $Psd1 | Out-String)))).ModuleVersion
     Update-AppveyorBuild -Version "$ModuleVersion ($env:APPVEYOR_BUILD_NUMBER) $env:APPVEYOR_REPO_BRANCH"
 }
-if ($Test) {
+if ($Test -or $TestImportOnly) {
     function Get-EnvironmentInfo {
         if ([environment]::OSVersion.Platform -like "win*") {
             # Get Windows Version
@@ -97,7 +100,23 @@ if (-not $VersionFilePath) {
     '[Progress] Installing Module.'
     . .\CI\Install.ps1
     '[Progress] Invoking Pester.'
-    Invoke-Pester -OutputFile ('TestResultsPS{0}.xml' -f $PSVersionTable.PSVersion)
+    $pesterParams = @{
+        OutputFile = ('TestResultsPS{0}.xml' -f $PSVersionTable.PSVersion)
+        PassThru = $true
+    }
+    if ($TestImportOnly) {
+        $pesterParams['Tag'] = 'TestImportOnly'
+    }
+    else {
+        $pesterParams['ExcludeTag'] = 'TestImportOnly'
+    }
+    $testResults = Invoke-Pester @pesterParams
+    'Pester invocation complete!'
+    if ($testResults.FailedCount -gt 0) {
+        "Test failures:"
+        $testResults.TestResult | Where-Object {-not $_.Passed} | Format-List
+        Write-Error "$($testResults.FailedCount) Pester tests failed. Build cannot continue!"
+    }
 }
 if ($Finalize) {
     '[Progress] Finalizing.'
@@ -206,4 +225,4 @@ if ($Analyzer) {
     else {
         "[Info] Invoke-ScriptAnalyzer didn't return any problems."
     }
-}
+}

ImportExcel.psm1

@@ -7,8 +7,8 @@ if (-not $Strings) {
 try { [void] [System.Reflection.Assembly]::LoadWithPartialName("System.Drawing") }
 catch { Write-Warning -Message $Strings.SystemDrawingAvailable }
 
-foreach ($directory in @('Private', 'Public','Charting','InferData','Pivot')) {
-    Get-ChildItem -Path "$PSScriptRoot\$directory\*.ps1" | ForEach-Object {. $_.FullName}
+foreach ($directory in @('Private', 'Public', 'Charting', 'InferData', 'Pivot')) {
+    Get-ChildItem -Path "$PSScriptRoot\$directory\*.ps1" | ForEach-Object { . $_.FullName }
 }
 
 if ($PSVersionTable.PSVersion.Major -ge 5) {
@@ -53,8 +53,8 @@ brew install mono-libgdiplus
 "@
             Write-Warning -Message $msg
         }
-        finally {
-            $ExcelPackage | Close-ExcelPackage -NoSave
-        }
     }
-}
+    finally {
+        $ExcelPackage | Close-ExcelPackage -NoSave
+    }
+}

__tests__/ImportExcelTests/TestImportOnly.tests.ps1

@@ -0,0 +1,6 @@
+Param()
+Describe "Module" -Tag "TestImportOnly" {
+    It "Should import without error" {
+        { Import-Module $PSScriptRoot\..\..\ImportExcel.psd1 -Force -ErrorAction Stop } | Should -Not -Throw
+    }
+}

azure-pipelines.yml

@@ -92,4 +92,20 @@ jobs:
       inputs:
         testResultsFormat: 'NUnit'
         testResultsFiles: '**/TestResults*.xml'
-        failTaskOnFailedTests: true
+        failTaskOnFailedTests: true
+
+  - job: macOSNoDeps
+    pool:
+      vmImage: 'macOS-latest'
+
+    steps:
+    - powershell: 'Install-Module -Name Pester -Force -MaximumVersion 4.99.99'
+      displayName: 'Update Pester'
+    - powershell: './CI/CI.ps1 -TestImportOnly'
+      displayName: 'Install and Test Import Only'
+
+    - task: PublishTestResults@2
+      inputs:
+        testResultsFormat: 'NUnit'
+        testResultsFiles: '**/TestResults*.xml'
+        failTaskOnFailedTests: true