Restructure of pester test layout

This restructuring moves tests to a directory name which matches the module
in which the cmdlet resides which should improve the discoverability of a
specific test.
For tests which are not about cmdlets in a module, new directories have been
created to make those tests easier to find as well

test/powershell/Modules/Microsoft.PowerShell.Utility/Get-Unique.Tests.ps1

@@ -0,0 +1,89 @@
+Describe "Get-Unique DRT Unit Tests" -Tags DRT{
+    It "Command get-unique works with AsString switch" {
+        $inputArray = "aa","aa","Aa","ba","BA","BA"
+        $results = $inputArray | Get-Unique -AsString 
+        
+        $results.Length | Should Be 4 
+               
+        $results[0] | Should Be "aa"
+        $results[1] | Should Be "Aa"
+        $results[2] | Should Be "ba"
+        $results[3] | Should Be "BA"
+
+        $results[0].GetType().FullName | Should be System.String
+        $results[1].GetType().FullName | Should be System.String
+        $results[2].GetType().FullName | Should be System.String
+        $results[3].GetType().FullName | Should be System.String
+    }
+}
+
+Describe "Get-Unique" {
+    $sortedList1 = 1,2,2,3,3,4,5
+    It "Should be able to use the Get-Unique cmdlet without error with inputObject switch" {
+	{ Get-Unique -InputObject $sortedList1 } | Should Not Throw
+    }
+
+    It "Should be able to uset the gu alias without error" {
+	{ gu -InputObject $sortedList1 } | Should Not Throw
+    }
+
+    It "Should output an array" {
+	$(Get-Unique -InputObject $sortedList1).GetType().BaseType | Should Be Array
+    }
+
+    It "Should output an array of unchanged items when the InputObject switch is used" {
+	$actual   = Get-Unique -InputObject $sortedList1
+
+	$actual[0] | Should Be $sortedList1[0]
+	$actual[1] | Should Be $sortedList1[1]
+	$actual[2] | Should Be $sortedList1[2]
+	$actual[3] | Should Be $sortedList1[3]
+	$actual[4] | Should Be $sortedList1[4]
+	$actual[5] | Should Be $sortedList1[5]
+	$actual[6] | Should Be $sortedList1[6]
+
+	$actual.Length | Should Be 7
+    }
+
+    It "Should accept piped input" {
+	{ $actualOutput = $sortedList1 | Get-Unique } | Should Not Throw
+    }
+
+    It "Should have the expected output when piped input is used" {
+	$actualOutput   = $sortedList1 | Get-Unique
+	$expectedOutput = 1,2,3,4,5
+
+	$actualOutput.Length | Should Be $expectedOutput.Length
+
+	$actualOutput[0] | Should Be $expectedOutput[0]
+	$actualOutput[1] | Should Be $expectedOutput[1]
+	$actualOutput[2] | Should Be $expectedOutput[2]
+	$actualOutput[3] | Should Be $expectedOutput[3]
+	$actualOutput[4] | Should Be $expectedOutput[4]
+    }
+
+    It "Should be able to input a collection in the inputObject switch" {
+	$collection = "a", "b", "b", "d"
+	$actual     = Get-Unique -InputObject $collection
+
+	$actual.Length | Should Be $collection.Length
+
+	$actual[0] | Should Be $collection[0]
+	$actual[1] | Should Be $collection[1]
+	$actual[2] | Should Be $collection[2]
+	$actual[3] | Should Be $collection[3]
+    }
+
+    It "Should get the unique items when piped collection input is used" {
+	$collection     = "a", "b", "b", "d"
+	$expectedOutput = "a", "b", "d"
+
+	$actual = $collection | Get-Unique
+
+	$actual.Length | Should Be $expectedOutput.Length
+
+	$actual[0] | Should Be $expectedOutput[0]
+	$actual[1] | Should Be $expectedOutput[1]
+	$actual[2] | Should Be $expectedOutput[2]
+    }
+}