Reorganize tests

- Pester source code moved to `test/Pester`, deleted `ext-src`.
- Pester tests (.ps1 files) moved to `test/powershell`
- xUnit tests (.cs files) moved to `test/csharp`
- Third-party script test moved to `test/shebang`

test/powershell/Set-PSBreakpoint.Tests.ps1

@@ -0,0 +1,34 @@
+$here = Split-Path -Parent $MyInvocation.MyCommand.Path
+
+Describe "Set-PSBreakpoint" {
+    # Set up test script
+    $testScript = "$here/psbreakpointtestscript.ps1"
+
+    "`$var = 1 " > $testScript
+
+    It "Should be able to set a psbreakpoint on a line" {
+        $lineNumber = 1
+        $(Set-PSBreakpoint -Line $lineNumber -Script $testScript).Line | Should Be $lineNumber
+    }
+
+    It "Should throw when a string is entered for a line number" {
+        {
+            $lineNumber = "one"
+            $(Set-PSBreakpoint -Line $lineNumber -Script $testScript).Line 
+
+        } | Should Throw
+    }
+
+    It "Should be able to set a psbreakpoint on a Command" {
+        $command = "theCommand"
+        $(Set-PSBreakpoint -Command $command -Script $testScript).Command | Should Be $command
+    }
+
+    It "Should be able to set a psbreakpoint on a variable" {
+        $var = "theVariable"
+        $(Set-PSBreakpoint -Command $var -Script $testScript).Command | Should Be $var
+    }
+
+    # clean up after ourselves
+    Remove-Item -Path $testScript
+}