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function Assert-ValueObjectAreAlike ($ReferenceObject, $DifferenceObject, $ExcludeProperty)
{
    [string[]] $properties =  ($ReferenceObject.psObject.Properties.Name + $DifferenceObject.psObject.Properties.Name ) | 
        sort -Unique | 
        where { $_ -notlike $ExcludeProperty }

    -not ( Compare-Object -ReferenceObject $ReferenceObject -DifferenceObject $DifferenceObject  -Property $properties )
}

#usual use case

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function DoSomething 
{
    Write-Warning "problem with the server certificate"
}

Describe 'Test warning' {
    Mock Write-Warning { $Message }
    
    It 'Writes warning' {

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describe "DS"{
    it "skipped" {} -skip
    it "pending" {} -Pending 
    It "throw" { throw "sdfad" }
    It "assertion fail" {1 | should be 10 }
    It "string assertion fail" {"asdf" | should be "ffsad" }
    it "success" {"adsf"}
}

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function Add-MongoToPath () {
    $mongoPath = "C:\Program Files\MongoDB\Server\3.2\bin"
    if ($env:Path -notlike "*$mongoPath*")
    {
        $env:path += ";$mongoPath"
    }
}

function Start-ServerInstace ([string]$ComputerName = "localhost", [int]$Port, [string]$ReplicationSet = "rs0", [string]$DatabasePath) {
    $process =  Start-Process Powershell.exe -PassThru -ArgumentList "-NoProfile", "-Command ""

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function SomeFunction ([ScriptBlock] $ScriptBlock) 
{
    Describe "Why?" {
        $result = &$ScriptBlock
        $result|Should Be 10
    }
} 

SomeFunction { 9 }

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function EnsureServiceStarted {                                                                
param($Name)    
    Start-Service -name $name
    $service = Get-Service -Name $name
    $service.Status -eq [ServiceProcess.ServiceControllerStatus]::Running
}

Describe "Ensure service is started" {
    It "Started service returns true" {
        mock start-service {}

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add-type -TypeDefinition @"
    using System;
    public static class KeyboardEventTestUtil {
        public static string keybd_event(byte bVk, byte bScan, UInt32 dwFlags, System.UIntPtr dwExtraInfo) {
            return string.Format("{0}:{1}:{2}:{3}", bVk,bScan,dwFlags,dwExtraInfo);
        }
    }
"@

describe "t" {

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function Test-UserName ($Name)
{
    $Name -match "^[a-z]+$"
}

Test-UserName $null
Test-UserName ""
Test-UserName "_abc"
Test-UserName "abc1"
Test-UserName "abc "

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$r = "c:\Program Files (x86)\VMware\Infrastructure\PowerCLI\Modules\VMware.VimAutomation.Sdk\VMware.VimAutomation.Sdk.Types.dll",
    "c:\Program Files (x86)\VMware\Infrastructure\PowerCLI\Modules\VMware.VimAutomation.Core\VMware.VimAutomation.ViCore.Types.dll"


Add-Type -ReferencedAssemblies $r -typeDefinition "
using VMware.VimAutomation.ViCore.Types.V1;
using VMware.VimAutomation.ViCore.Types.V1.Tagging;

namespace Mocks
{

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function Should-Be {
    param($Expected,[Parameter(ValueFromPipeline)]$Actual) 
    "We are comparing if two values are equal so"
    "when `$Expected is $($Expected.GetType()) with value '$Expected'"
    
    if ($null -eq $Actual) 
    {
        "and `$Actual is `$null then the result is:"
    }
    else