Add tests for AvoidUnInitializedVarsInNewRunspaces

Author: Jos Koelewijn

Tests/Rules/AvoidUnInitializedVarsInNewRunspaces.tests.ps1

@@ -0,0 +1,90 @@
+$directory = Split-Path -Parent $MyInvocation.MyCommand.Path
+$testRootDirectory = Split-Path -Parent $directory
+
+Import-Module (Join-Path $testRootDirectory "PSScriptAnalyzerTestHelper.psm1")
+
+$ruleName = "PSAvoidUnInitializedVarsInNewRunspaces"
+
+$settings = @{
+    IncludeRules = @($ruleName)
+}
+
+Describe "AvoidUnInitializedVarsInNewRunspaces" {
+    Context "Should detect something" {
+        $testCases = @(
+            @{
+                Description = "Foreach-Object -Parallel with undeclared var"
+                ScriptBlock = '{
+                    1..2 | ForEach-Object -Parallel { $var }
+                }'
+            }
+            @{
+                Description = "alias foreach -parallel with undeclared var"
+                ScriptBlock = '{
+                    1..2 | ForEach -Parallel { $var }
+                }'
+            }
+            @{
+                Description = "alias % -parallel with undeclared var"
+                ScriptBlock = '{
+                    1..2 | % -Parallel { $var }
+                }'
+            }
+            @{
+                Description = "abbreviated param Foreach-Object -pa with undeclared var"
+                ScriptBlock = '{
+                    1..2 | foreach-object -pa { $var }
+                }'
+            }
+            @{
+                Description = "Nested Foreach-Object -Parallel with undeclared var"
+                ScriptBlock = '{
+                    $myNestedScriptBlock = {
+                        1..2 | ForEach-Object -Parallel { $var }
+                    }
+                }'
+            }
+        )
+
+        it "should emit for: <Description>" -TestCases $testCases {
+            param($Description, $ScriptBlock)
+            [System.Array] $warnings = Invoke-ScriptAnalyzer -ScriptDefinition $ScriptBlock -Settings $settings
+            $warnings.Count | Should -Be 1
+        }
+    }
+
+    Context "Should not detect anything" {
+        $testCases = @(
+            @{
+                Description = "Foreach-Object with uninitialized var inside"
+                ScriptBlock = '{
+                    1..2 | ForEach-Object { $var }
+                }'
+            }
+            @{
+                Description = "Foreach-Object -Parallel with uninitialized `$using: var"
+                ScriptBlock = '{
+                    1..2 | foreach-object -Parallel { $using:var }
+                }'
+            }
+            @{
+                Description = "Foreach-Object -Parallel with var assigned locally"
+                ScriptBlock = '{
+                    1..2 | ForEach-Object -Parallel { $var="somevalue" }
+                }'
+            }
+            @{
+                Description = "Foreach-Object -Parallel with built-in var '`$Args' inside"
+                ScriptBlock = '{
+                    1..2 | ForEach-Object { $Args[0] } -ArgumentList "a" -Parallel
+                }'
+            }
+        )
+
+        it "should not emit anything for: <Description>" -TestCases $testCases {
+            param($Description, $ScriptBlock)
+            [System.Array] $warnings = Invoke-ScriptAnalyzer -ScriptDefinition $ScriptBlock -Settings $settings
+            $warnings.Count | Should -Be 0
+        }
+    }
+}