fixed up tests to test standards

src/pester-tests/Test-Get-PSDrive.Tests.ps1

@@ -1,31 +1,31 @@
 Describe "Test-Get-PSDrive" {
     It "Should not throw" {
-        Get-PSDrive               | Should Not BeNullOrEmpty
+        Get-PSDrive | Should Not BeNullOrEmpty
+    }
+
+    It "Should have a name and a length property" {
         (Get-PSDrive).Name        | Should Not BeNullOrEmpty 
         (Get-PSDrive).Root.Length | Should Not BeLessThan 1
+    }
 
-        gdr               | Should Not BeNullOrEmpty
-        (gdr).Name        | Should Not BeNullOrEmpty 
-        (gdr).Root.Length | Should Not BeLessThan 1
+    It "Should be able to be called with the gdr alias" {
+        { gdr } | Should Not Throw
+
+        gdr | Should Not BeNullOrEmpty
     }
 
     It "Should return drive info"{
         (Get-PSDrive Env).Name        | Should Be Env
         (Get-PSDrive /).Root          | Should Be /
         (Get-PSDrive /).Provider.Name | Should Be FileSystem
-
-        (gdr Env).Name        | Should Be Env
-        (gdr /).Root          | Should Be /
-        (gdr /).Provider.Name | Should Be FileSystem
     }
 
-    It "Should be able to access switches"{
+    It "Should be able to access a drive using the PSProvider switch" {
         (Get-PSDrive -PSProvider FileSystem).Name.Length | Should BeGreaterThan 0
-
-        (gdr -PSProvider FileSystem).Name.Length | Should BeGreaterThan 0
     }
 
-    It "Should return true for a drive that does not exist"{
+    It "Should return true that a drive that does not exist"{
         !(Get-PSDrive fake -ErrorAction SilentlyContinue) | Should Be $True
+        Get-PSDrive fake -ErrorAction SilentlyContinue    | Should BeNullOrEmpty
     }
 }