added more tests to more thoroughly test split-path

src/pester-tests/Test-Split-Path.Tests.ps1

@@ -1,36 +1,66 @@
 Describe "Test-Split-Path" {
 <#
     Dependencies:
+
     1. Split-Path - FUT
     2. ForEach
     3. Object piping
     4. ls/Get-ChildItem - filter output of ls
 
+    parent and Literal 
+
 #>
     It "Should return a string object when invoked" {
-        (Split-Path .).GetType().Name          | Should Be "String"
-        (Split-Path . -Leaf).GetType().Name    | Should Be "String"
-        (Split-Path . -Resolve).GetType().Name | Should Be "String"
+        ( Split-Path . ).GetType().Name          | Should Be "String"
+        ( Split-Path . -Leaf ).GetType().Name    | Should Be "String"
+        ( Split-Path . -Resolve ).GetType().Name | Should Be "String"
     }
 
     It "Should return the name of the drive when the qualifier switch is used" {
-        Split-Path / -Qualifier | Should Be "/"
+        Split-Path / -Qualifier        | Should Be "/"
+        Split-Path /usr/bin -Qualifier | Should Be "/"
+    }
+
+    It "Should error when using the qualifier switch for a windows path while on a nonwindows machine" {
+         Split-Path "C:\Users" -Qualifier -ErrorAction SilentlyContinue  | Should Throw
+    }
+
+    It "Should error when no directory separator characters are used with a qualifier" {
+         Split-Path "abadTest" -Qualifier -ErrorAction SilentlyContinue  | Should Throw
+    }
+
+    It "Should return the path minus the drive when the noqualifier switch is used" { 
+        { Split-Path /usr/bin -NoQualifier } | Should Not Throw
+        Split-Path /usr/bin -NoQualifier | Should Be "usr/bin"
     }
 
     It "Should return the parent folder name when the leaf switch is used" {
-        Split-Path . -Leaf | Should be "pester-tests"
+        Split-Path /usr/bin -Leaf | Should be "bin"
     }
 
     It "Should be able to accept regular expression input and output an array for multiple objects" {
-        (Split-Path *Get*.ps1 -Leaf -Resolve).GetType().BaseType.Name | Should Be "Array"
+        ( Split-Path *Get*.ps1 -Leaf -Resolve ).GetType().BaseType.Name | Should Be "Array"
     }
 
     It "Should be able to tell if a given path is an absolute path" {
-        (Split-Path /usr/bin -IsAbsolute) | Should be $true
-        (Split-Path . -IsAbsolute)        | Should be $false
+        ( Split-Path /usr/bin -IsAbsolute ) | Should be $true
+        ( Split-Path . -IsAbsolute )        | Should be $false
     }
 
     It "Should support piping" {
-        ("." | Split-Path -leaf) | Should Be "pester-tests"
+        ( "/usr/bin" | Split-Path ) | Should Be "/usr"
     }
+
+    It "Should return the path up to the parent of the directory when Parent switch is used" {
+        Split-Path "/usr/bin" | Should Be ( Split-Path "/usr/bin" -Parent )
+    }
+
+    It "Should not throw if a parameterSetName is correct" {
+        { Split-Path "/usr/bin/" -Parent } | Should Not Throw
+    }
+
+    It "Should throw if a parameterSetName is incorrect" {
+        { Split-Path "/usr/bin/" -Parentaoeu } | Should Throw
+    }
+
 }