Tests for ProvideDefaultParameterValue rule

Getting "Object reference not set to an instance of an object error"
when running test, but seems to complete successfully. Need to
investigate error.

Author: GoodOlClint

Tests/Rules/ProvideDefaultParameterValue.ps1

@@ -0,0 +1,9 @@
+function BadFunc
+{
+    param(
+        [Parameter()]
+        [ValidateNotNullOrEmpty()]    
+        [string]
+        $Param1
+    )
+}

Tests/Rules/ProvideDefaultParameterValue.tests.ps1

@@ -0,0 +1,24 @@
+Import-Module PSScriptAnalyzer
+$violationName = "PSProvideDefaultParameterValue"
+$violationMessage = "Parameter 'Param1' is not initialized. Non-global variables must be initialized. To fix a violation of this rule, please initialize non-global variables."
+$directory = Split-Path -Parent $MyInvocation.MyCommand.Path
+$violations = Invoke-ScriptAnalyzer $directory\ProvideDefaultParameterValue.ps1 | Where-Object {$_.RuleName -match $violationName}
+$noViolations = Invoke-ScriptAnalyzer $directory\ProvideDefaultParameterValueNoViolations.ps1
+
+Describe "ProvideDefaultParameters" {
+    Context "When there are violations" {
+        It "has 1 provide default parameter value violation" {
+            $violations.Count | Should Be 1
+        }
+
+        It "has the correct description message" {
+            $violations[0].Message | Should Match $violationMessage
+        }
+    }
+
+    Context "When there are no violations" {
+        It "returns no violations" {
+            $noViolations.Count | Should Be 0
+        }
+    }
+}

Tests/Rules/ProvideDefaultParameterValueNoViolations.ps1

@@ -0,0 +1,8 @@
+function GoodFunc
+{
+    param(
+        [parmaeter(mandatory=$false)]
+        [string]$Param1=$null
+    )
+    $Param1
+}