Describe "Get-Alias DRT Unit Tests" -Tags DRT{
	It "Get-Alias Bogus Scope Name should throw PSArgumentException"{	
		try { 
			Get-Alias -Name "ABCD" -Scope "bogus"
			Throw "Execution OK"
		} 
		catch {
			$_.FullyQualifiedErrorId | Should be "Argument,Microsoft.PowerShell.Commands.GetAliasCommand"
		}
	}
	It "Get-Alias OutOfRange Scope"{
		try { 
			Get-Alias -Name "ABCD" -Scope "99999"
			Throw "Execution OK"
		} 
		catch {
			$_.FullyQualifiedErrorId | Should be "ArgumentOutOfRange,Microsoft.PowerShell.Commands.GetAliasCommand"
		}
	}
	It "Get-Alias Named Single Valid"{
			Set-Alias -Name ABCD -Value "foo" 
			$result=Get-Alias -Name ABCD
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
	}
	It "Get-Alias Positional Single Valid"{
			Set-Alias -Name ABCD -Value "foo" 
			$result=Get-Alias ABCD
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
	}
	It "Get-Alias Named Multiple Valid"{
			Set-Alias -Name ABCD -Value "foo" 
			Set-Alias -Name AEFG -Value "bar" 
			$result=Get-Alias -Name ABCD,AEFG
			$result[0].Name| Should Be "ABCD"
			$result[0].Definition| Should Be "foo"
			$result[0].Description| Should Be ""
			$result[0].Options| Should Be "None"
			$result[1].Name| Should Be "AEFG"
			$result[1].Definition| Should Be "bar"
			$result[1].Description| Should Be ""
			$result[1].Options| Should Be "None"
	}
	It "Get-Alias Named Wildcard Valid"{
			Set-Alias -Name ABCD -Value "foo" 
			Set-Alias -Name ABCG -Value "bar" 
			$result=Get-Alias -Name ABC*
			$result[0].Name| Should Be "ABCD"
			$result[0].Definition| Should Be "foo"
			$result[0].Description| Should Be ""
			$result[0].Options| Should Be "None"
			$result[1].Name| Should Be "ABCG"
			$result[1].Definition| Should Be "bar"
			$result[1].Description| Should Be ""
			$result[1].Options| Should Be "None"
	}
	It "Get-Alias Positional Wildcard Valid"{
			Set-Alias -Name ABCD -Value "foo" 
			Set-Alias -Name ABCG -Value "bar" 
			$result=Get-Alias ABC*
			$result[0].Name| Should Be "ABCD"
			$result[0].Definition| Should Be "foo"
			$result[0].Description| Should Be ""
			$result[0].Options| Should Be "None"
			$result[1].Name| Should Be "ABCG"
			$result[1].Definition| Should Be "bar"
			$result[1].Description| Should Be ""
			$result[1].Options| Should Be "None"
	}
	It "Get-Alias Named Wildcard And Exclude Valid"{
			Set-Alias -Name ABCD -Value "foo" 
			Set-Alias -Name ABCG -Value "bar" 
			$result=Get-Alias -Name ABC* -Exclude "*BCG"
			$result[0].Name| Should Be "ABCD"
			$result[0].Definition| Should Be "foo"
			$result[0].Description| Should Be ""
			$result[0].Options| Should Be "None"
	}
	It "Get-Alias Scope Valid"{
			Set-Alias -Name ABCD -Value "foo"
			$result=Get-Alias -Name ABCD
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			Set-Alias -Name ABCD -Value "localfoo" -scope local
			$result=Get-Alias -Name ABCD -scope local
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "localfoo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			Set-Alias -Name ABCD -Value "globalfoo" -scope global
			Set-Alias -Name ABCD -Value "scriptfoo" -scope "script"
			Set-Alias -Name ABCD -Value "foo0" -scope "0"
			Set-Alias -Name ABCD -Value "foo1" -scope "1"
			
			$result=Get-Alias -Name ABCD
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo0"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			$result=Get-Alias -Name ABCD -scope local
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo0"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			$result=Get-Alias -Name ABCD -scope global
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "globalfoo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			$result=Get-Alias -Name ABCD -scope "script"
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "scriptfoo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			$result=Get-Alias -Name ABCD -scope "0"
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo0"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			$result=Get-Alias -Name ABCD -scope "1"
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo1"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
	}
	It "Get-Alias Expose Bug 1065828, BugId:905235"{
		try { 
			Get-Alias -Name "ABCD" -Scope "100"
			Throw "Execution OK"
		} 
		catch {
			$_.FullyQualifiedErrorId | Should be "ArgumentOutOfRange,Microsoft.PowerShell.Commands.GetAliasCommand"
		}
	}
	It "Get-Alias Zero Scope Valid"{
			Set-Alias -Name ABCD -Value "foo"
			$result=Get-Alias -Name ABCD
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
			
			$result=Get-Alias -Name ABCD -scope "0"
			$result.Name| Should Be "ABCD"
			$result.Definition| Should Be "foo"
			$result.Description| Should Be ""
			$result.Options| Should Be "None"
	}
}

Describe "Get-Alias" {
    It "Should have a return type of System.Array when gal returns more than one object" {
	$val1=(Get-Alias a*)
	$val2=(Get-Alias c*)
	$i=0

	$val1 | ForEach-Object{ $i++};
	if($i -lt 2) {
	    $val1.GetType().BaseType.FullName | Should Be "System.Management.Automation.CommandInfo"
	}
	else
	{
	    $val1.GetType().BaseType.FullName | Should Be "System.Array"
	}

	$val2 | ForEach-Object{ $i++};
	if($i -lt 2) {
	    $val2.GetType().BaseType.FullName | Should Be "System.Management.Automation.CommandInfo"
	}
	else
	{
	    $val2.GetType().BaseType.FullName | Should Be "System.Array"
	}

    }

    It "should return an array of 3 objects" {
	$val = Get-Alias a*
	$alias = gal a*

	$val.CommandType | Should Not BeNullOrEmpty
	$val.Name	 | Should Not BeNullOrEmpty
	$val.ModuleName  | Should BeNullOrEmpty

	$alias.CommandType | Should Not BeNullOrEmpty
	$alias.Name        | Should Not BeNullOrEmpty
	$alias.ModuleName  | Should BeNullOrEmpty
    }
}