Add workflow and tests

.github/actions-pester/Test-ArmTemplates.Tests.ps1

@@ -0,0 +1,72 @@
+<# Script to validate ARM templates using the Test-AzTemplate cmdlet #>
+
+# Define a function to get the list of changed files in a pull request
+function Get-ChangedFile {
+    [CmdletBinding(SupportsShouldProcess)]
+    param (
+        # Parameter to filter files by path
+        [Parameter()]
+        [String]$pathFilter,
+
+        # Parameter to filter files by extension
+        [Parameter()]
+        [String]$extensionFilter,
+
+        # Parameter to specify the pull request branch, defaulting to the GitHub head reference
+        [Parameter()]
+        [String]$PRBranch = "$($env:GITHUB_HEAD_REF)"
+    )
+    # Get the list of changed files between the main branch and the pull request branch
+    $changedFiles = git diff --name-only origin/main origin/$PRBranch
+
+    # Create a regex pattern to filter files based on the provided path and extension
+    $regex = "$pathFilter.*\.$extensionFilter"
+
+    # Filter the changed files using the regex pattern
+    $resultFiles = $changedFiles | Where-Object { $PSItem -match $regex }
+
+    # Return the filtered files
+    $resultFiles | ForEach-Object {
+        return $_
+    }
+}
+
+# Get the list of modified ARM template files
+$ModifiedFiles = @(Get-ChangedFile -pathFilter 'templates/arm' -extensionFilter 'json')
+
+# Check if there are any modified ARM template files
+if ($null -ne $ModifiedFiles) {
+    Write-Output "These are the modified ARM templates: $($ModifiedFiles)"
+} else {
+    Write-Output "There are no modified ARM templates"
+}
+
+# Initialize a counter for the number of failed tests
+$NumberOfFailedTests = 0
+
+# Iterate over each modified ARM template file
+$ModifiedFiles | ForEach-Object {
+    $TemplatePath = $PSItem
+    Write-Output "Test $TemplatePath"
+
+    # Run the Test-AzTemplate cmdlet to test the ARM template
+    $testResults = Test-AzTemplate -TemplatePath $TemplatePath -Test deploymentTemplate -ErrorAction Continue
+
+    # Filter the test results to find any failed tests
+    $failedTests = $testResults | Where-Object { $PSItem.Passed -ne $True }
+
+    # If there are failed tests, log a warning and increment the failed tests counter
+    if ($failedTests -ne $null) {
+        $failedTests | ForEach-Object {
+            Write-Warning "$($PSItem | Out-String)"
+            $NumberOfFailedTests++
+        }
+    }
+}
+
+# If there are any failed tests, log an error and exit with a non-zero status
+If ($NumberOfFailedTests -gt 0) {
+    Write-Error "There are $NumberOfFailedTests failed tests"
+    exit 1
+}
+

.github/workflows/unit-test-arm-templates.yml

@@ -0,0 +1,43 @@
+---
+name: Unit Test ARM templates with arm-ttk
+
+##########################################
+# Start the job on PR for all branches #
+#########################################
+
+# yamllint disable-line rule:truthy
+on:
+  pull_request:
+    types:
+      - opened
+      - reopened
+      - synchronize
+      - ready_for_review
+    paths:
+      - "services/**/**/templates/arm/**.json"
+  workflow_dispatch: { }
+
+permissions:
+  id-token: write
+  contents: read
+
+jobs:
+  validate-arm-files:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+          ref: ${{github.event.pull_request.head.ref}}
+          repository: ${{github.event.pull_request.head.repo.full_name}}
+      - name: Clone ARM-TTK repo
+        uses: GuillaumeFalourd/clone-github-repo-action@v3
+        with:
+          owner: 'Azure'
+          repository: 'arm-ttk'
+      - name: Test Modified ARM templates
+        shell: pwsh
+        run: |
+            Import-Module ./arm-ttk/arm-ttk/arm-ttk.psd1
+            ./.github/actions-pester/Test-ArmTemplates.Tests.ps1