add simple syntax checking for all PowerShell script/module files

* checks all .ps1 and .psm1 files in the Project repository
* NOTE: this is just simple syntax checking, but it can catch a lot of simple mistakes

test/00-Project.Tests.ps1

@@ -0,0 +1,54 @@
+$repo_dir = (Get-Item $MyInvocation.MyCommand.Path).directory.parent.FullName
+
+describe 'Project code' {
+
+    $files = @(
+        Get-ChildItem $repo_dir -file -recurse -force | ? { $_.fullname -match '.(ps1|psm1)$' }
+    )
+
+    function Test-PowerShellSyntax {
+        #ref: http://powershell.org/wp/forums/topic/how-to-check-syntax-of-scripts-automatically @@ https://archive.is/xtSv6
+        [CmdletBinding()]
+        param (
+            [Parameter(Mandatory = $true, ValueFromPipeline = $true)]
+            [string[]]
+            $Path
+        )
+
+        process {
+            foreach ($scriptPath in $Path) {
+                $contents = Get-Content -Path $scriptPath
+
+                if ($null -eq $contents) {
+                    continue
+                }
+
+                $errors = $null
+                $null = [System.Management.Automation.PSParser]::Tokenize($contents, [ref]$errors)
+
+                New-Object psobject -Property @{
+                    Path = $scriptPath
+                    SyntaxErrorsFound = ($errors.Count -gt 0)
+                }
+            }
+        }
+    }
+
+    it 'PowerShell files do not contain syntax errors' {
+        $badFiles = @(
+            foreach ($file in $files)
+            {
+                if ( (Test-PowerShellSyntax $file.FullName).SyntaxErrorsFound )
+                {
+                    $file.FullName
+                }
+            }
+        )
+
+        if ($badFiles.Count -gt 0)
+        {
+            throw "The following files have syntax errors: `r`n`r`n$($badFiles -join "`r`n")"
+        }
+    }
+
+}