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Get-Module Pester, A, B | Remove-Module 
Import-Module C:\Projects\Pester_main\Pester.psd1

New-Module A { } | Import-Module 
New-Module B { 
    function Greet ($Name) { Hello -Name $Name } 
    function Hello ($Name) { "Hello, $Name" }

    Export-ModuleMember -Function WrapWrapWrap, Greet
} | Import-Module

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# in module scope
$script:pester


function describe () { 
    $script:pester.EnterBlock("describe") 
}

function it () { 

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$p1 = 10
$p2 = 20
$f = {
    "-$p1- -$p2-"
}

& {
    param($p1)
    # outputs the scriptblock, instead of 10
    # we have a naming conflict of names 

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# InvokeWith context is useful when we have something like 
# ```
# $num = 1
# 1,2,3 | Assert-All -filter { $num -eq $_ }
# ```
# Where Assert-All is defined in a module where we invoke the filter script. The script needs to 
# stay bounded to the original scope to keep $name resolvable, but we also need to push the 
# $_ variable into the script block when invoking it. 

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function A { 
    [CmdletBinding()]
    param() 

    if ($null -eq $Option) { throw }
}

Describe "A" {
    it "works" {
        $option = "abc"

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# variable in parent scope
$a = 1

function f1 ($a) { 
    # $a is shadowed by the parameter result is -- 
    "-$a-" 
}

f1 

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#requires -RunAsAdministrator

param (
    [Parameter(Mandatory)]
    $Path)
 
$ErrorActionPreference = 'stop'
if (-not (Test-Path $Path)) {throw "Path $Path does not exist!" }

# import it for current user

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$MyObject = [PSCustomObject]@{ Value = 15; Value2 = 13; Value3 = "j" }
$Fields = @{
    Value = "special"
    Value2 = "Different"
}


$hashtable = @{}
foreach ($property in $MyObject.PSObject.Properties) {
    if ($Fields.ContainsKey($property.Name))

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"a" | Set-Content "c:\temp\abc.txt" -Force
Remove-Item  "c:\temp\bbc.txt"

Get-Item "C:\temp\abc.txt" | 
    Rename-Item -NewName { $_.Name -replace "a","b"} 

Get-Content  "c:\temp\bbc.txt"

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# command to be tested
$commandName = 'Get-Command'
# get all examples from the help
$examples = Get-Help $commandName -Examples

# make a describe block that will contain tests for this 
Describe "Examples from $commandName" {
  $examples.Examples.Example | foreach { 
    # examples have different format, 
    # at least the ones I used that MS provided