diff --git a/azure-pipelines/e2e-specs/autocomplete-posh-vcpkg.Tests.ps1 b/azure-pipelines/e2e-specs/autocomplete-posh-vcpkg.Tests.ps1
new file mode 100644
index 0000000000..c0115d518c
--- /dev/null
+++ b/azure-pipelines/e2e-specs/autocomplete-posh-vcpkg.Tests.ps1
@@ -0,0 +1,378 @@
+param (
+    [Parameter(Mandatory)][string]$poshVcpkgModulePath,
+    [Parameter(Mandatory)][System.IO.FileInfo]$vcpkgExe
+)
+
+BeforeAll {
+    Import-Module $poshVcpkgModulePath
+
+    $env:PATH = $vcpkgExe.Directory.FullName + [System.IO.Path]::PathSeparator + $env:PATH
+
+    function Complete-InputCaret {
+        [OutputType([string[]])]
+        param (
+            [Parameter(Mandatory, Position = 0, ValueFromPipeline)]
+            [string]$InputCaretScript
+        )
+        $positionMatches = [regex]::Matches($InputCaretScript, '\^')
+        if ($positionMatches.Count -ne 1) {
+            throw 'Invalid caret cursor command, please indicate by only one ^ character'
+        }
+        $command = [string]$InputCaretScript.Replace('^', '')
+        $cursorPosition = [int]$positionMatches[0].Index
+        $result = [System.Management.Automation.CommandCompletion]::CompleteInput($command, $cursorPosition, $null)
+        return $result.CompletionMatches | Select-Object -ExpandProperty CompletionText
+    }
+
+    $VcpkgPredefined = @{
+        CommandList         = @(
+            'acquire_project', 'acquire', 'activate', 'add', 'create', 'deactivate', 'depend-info', 'edit', 'env'
+            'export', 'fetch', 'find', 'format-manifest', 'hash', 'help', 'install', 'integrate', 'list', 'new', 'owns'
+            'portsdiff', 'remove', 'search', 'update', 'upgrade', 'use', 'version', 'x-add-version', 'x-check-support'
+            'x-init-registry', 'x-package-info', 'x-regenerate', 'x-set-installed', 'x-update-baseline'
+            'x-update-registry', 'x-vsinstances'
+        )
+        CommonParameterList = @()
+        CommandOptionList   = @{
+            install = @(
+                '--allow-unsupported', '--clean-after-build', '--clean-buildtrees-after-build'
+                '--clean-downloads-after-build', '--clean-packages-after-build', '--dry-run', '--editable'
+                '--enforce-port-checks', '--head', '--keep-going', '--no-downloads', '--no-print-usage'
+                '--only-binarycaching', '--only-downloads', '--recurse', '--x-feature', '--x-no-default-features'
+                '--x-prohibit-backcompat-features', '--x-use-aria2', '--x-write-nuget-packages-config', '--x-xunit'
+            )
+            remove  = @(
+                '--dry-run', '--outdated', '--purge', '--recurse'
+            )
+        }
+    }
+    $VcpkgPredefined | Out-Null
+}
+
+Describe 'Prerequisites tests' {
+    Context 'Internal function Complete-InputCaret tests' {
+        It 'Complete-InputCaret 1 caret string should success' {
+            { 'aaaa^' | Complete-InputCaret } | Should -Not -Throw
+        }
+
+        It 'Complete-InputCaret 0 caret string should throw' {
+            { 'aaaa' | Complete-InputCaret } | Should -Throw
+        }
+
+        It 'Complete-InputCaret 2 caret string should throw' {
+            { 'aaaa^^' | Complete-InputCaret } | Should -Throw
+        }
+
+        It 'Complete-InputCaret self should success' {
+            'Complete-InputCaret^' | Complete-InputCaret | Should -Contain 'Complete-InputCaret'
+        }
+    }
+
+    Context 'Exist module and command tests' {
+        It 'Should imported module posh-vcpkg' {
+            (Get-Module -Name posh-vcpkg).Name | Should -Be 'posh-vcpkg'
+        }
+
+        It 'Should version greater than or equal 0.0.2' {
+            (Get-Module posh-vcpkg).Version | Should -BeGreaterOrEqual '0.0.2'
+        }
+
+        It 'Should have executable vcpkg' {
+            $vcpkgExe | Should -Exist
+        }
+
+        It 'Should have command vcpkg' {
+            Get-Command -Name vcpkg | Should -Not -BeNullOrEmpty
+        }
+
+        It 'Should command vcpkg is the executable' {
+            (Get-Command -Name vcpkg).Path | Should -Be $vcpkgExe.FullName
+        }
+    }
+}
+
+Describe 'Complete basic tests' {
+    Context 'Complete full command contain tests' {
+        It 'Should complete command [vcpkg <_>^] contain [<_>]' -ForEach @(
+            'help'
+            'install'
+            'version'
+            'integrate'
+        ) {
+            'vcpkg {0}^' -f $_ | Complete-InputCaret | Should -Contain $_
+        }
+    }
+
+    Context 'Complete full command exact match tests' {
+        It 'Should exact match command completions [vcpkg <_>^] be [<_>]' -ForEach @(
+            'help'
+            'install'
+            'version'
+            'integrate'
+        ) {
+            'vcpkg {0}^' -f $_ | Complete-InputCaret | Should -Be $_
+        }
+    }
+
+    Context 'Complete part command contain tests' {
+        It 'Should complete command [vcpkg <command>^] contain [<expected>]' -ForEach @(
+            @{command = 'he'; expected = 'help' }
+            @{command = 'in'; expected = 'install' }
+            @{command = 've'; expected = 'version' }
+            @{command = 'in'; expected = 'integrate' }
+        ) {
+            'vcpkg {0}^' -f $command | Complete-InputCaret | Should -Contain $expected
+        }
+    }
+
+    Context 'Complete space tests' {
+        It 'Should complete command for blank space [vcpkg ^] contain [<_>]' -ForEach @(
+            'help'
+            'install'
+            'version'
+            'integrate'
+        ) {
+            'vcpkg ^' | Complete-InputCaret | Should -Contain $_
+        }
+
+        It 'Should exact match command completions for blank space [vcpkg ^]' {
+            $completions = 'vcpkg ^' | Complete-InputCaret
+            $expected = $VcpkgPredefined.CommandList
+            Compare-Object $completions $expected | Should -BeNullOrEmpty
+        }
+    }
+}
+
+Describe 'Complete command tests' {
+    Context 'Complete common option tests' -Skip {
+        It 'Should complete common option for blank space [vcpkg ^] contain [--host-triplet]' {
+            'vcpkg ^' | Complete-InputCaret | Should -Contain '--host-triplet'
+        }
+
+        It 'Should complete common option for blank space [vcpkg ^] contain [--host-triplet=]' {
+            'vcpkg ^' | Complete-InputCaret | Should -Contain '--host-triplet='
+        }
+
+        It 'Should complete common option for blank space [vcpkg ^] contain [--vcpkg-root]' {
+            'vcpkg ^' | Complete-InputCaret | Should -Contain '--vcpkg-root'
+        }
+
+        It 'Should complete common option for blank space [vcpkg ^] contain [--vcpkg-root=]' {
+            'vcpkg ^' | Complete-InputCaret | Should -Contain '--vcpkg-root='
+        }
+    }
+
+    Context 'Complete common option argument tests' -Skip {
+        It 'Should complete common option arguments for [vcpkg --triplet^] contain [--triplet=]' {
+            'vcpkg --triplet^' -f $argument | Complete-InputCaret | Should -Contain '--triplet=x64-windows'
+        }
+
+        It 'Should complete common option arguments for [vcpkg --triplet=^] contain [--triplet=x64-windows]' {
+            'vcpkg --triplet=^' -f $argument | Complete-InputCaret | Should -Contain '--triplet=x64-windows'
+        }
+
+        It 'Should complete common option arguments for [vcpkg --triplet=x64^] contain [--triplet=x64-windows]' {
+            'vcpkg --triplet=x64^' -f $argument | Complete-InputCaret | Should -Contain '--triplet=x64-windows'
+        }
+    }
+
+    # Skip due to https://github.com/PowerShell/PowerShell/issues/2912
+    Context 'Complete command option list tests conditionally - CoreOnly' -Tag CoreOnly {
+        It 'Should complete option flags with single minus [vcpkg <command> -^] contain [<expected>]' -ForEach @(
+            @{ command = 'install'  ; expected = '--editable' }
+            @{ command = 'remove'   ; expected = '--dry-run' }
+        ) {
+            'vcpkg {0} -^' -f $command | Complete-InputCaret | Should -Contain $expected
+        }
+
+        It 'Should complete option flags with double minus [vcpkg <command> --^] contain [<expected>]' -ForEach @(
+            @{ command = 'install'  ; expected = '--editable' }
+            @{ command = 'remove'   ; expected = '--dry-run' }
+        ) {
+            'vcpkg {0} --^' -f $command | Complete-InputCaret | Should -Contain $expected
+        }
+
+        It 'Should exact match command options for double minus [vcpkg <_> --^]' -ForEach @(
+            'install'
+            'remove'
+        ) {
+            $completions = 'vcpkg {0} --^' -f $_ | Complete-InputCaret
+            $expected = $VcpkgPredefined.CommandOptionList[$_]
+            Compare-Object $completions $expected | Should -BeNullOrEmpty
+        }
+    }
+
+    Context 'Complete command argument tests conditionally' {
+        It 'Should complete install with port name [<caretCmd>] contain [<expected>]' -ForEach @(
+            @{ caretCmd = 'vcpkg install vcpkg-^' ; expected = 'vcpkg-cmake' }
+        ) {
+            $caretCmd | Complete-InputCaret | Should -Contain $expected
+        }
+
+        It 'Should complete install port with triplet [<caretCmd>] contain [<expected>]' -ForEach @(
+            @{ caretCmd = 'vcpkg install vcpkg-cmake:^' ; expected = 'vcpkg-cmake:x64-windows' }
+        ) {
+            $caretCmd | Complete-InputCaret | Should -Contain $expected
+        }
+
+        It 'Should complete integrate with subcommand [vcpkg integrate inst^] be [install]' {
+            'vcpkg integrate inst^' | Complete-InputCaret | Should -Be 'install'
+        }
+
+        It 'Should complete integrate with subcommand [vcpkg integrate ^] contain [powershell] - WindowsOnly' -Tag WindowsOnly {
+            'vcpkg integrate ^' | Complete-InputCaret | Should -Contain 'powershell'
+        }
+
+        It 'Should complete integrate with subcommand [vcpkg integrate ^] contain [bash] - NonWindowsOnly' -Tag NonWindowsOnly {
+            'vcpkg integrate ^' | Complete-InputCaret | Should -Contain 'bash'
+        }
+
+        It 'Should exact match command subcommands [vcpkg integrate ^] - WindowsOnly' -Tag WindowsOnly {
+            $expected = @('install', 'remove', 'powershell', 'project')
+            $completions = 'vcpkg integrate ^' | Complete-InputCaret
+            Compare-Object $completions $expected | Should -BeNullOrEmpty
+        }
+
+        It 'Should exact match command subcommands [vcpkg integrate ^] - NonWindowsOnly' -Tag NonWindowsOnly {
+            $expected = @('install', 'remove', 'bash', 'x-fish', 'zsh')
+            $completions = 'vcpkg integrate ^' | Complete-InputCaret
+            Compare-Object $completions $expected | Should -BeNullOrEmpty
+        }
+    }
+}
+
+Describe 'Complete variants tests' {
+    BeforeAll {
+        Set-Variable vcpkgWithExt ($vcpkgExe.FullName)
+        Set-Variable vcpkgNoExt ([System.IO.Path]::GetFileNameWithoutExtension($vcpkgExe.FullName))
+    }
+
+    Context 'Complete basic variant command tests' {
+        It 'Should exact match command completions with call operator absolute exe word be [version]' {
+            "& $vcpkgWithExt ver^" | Complete-InputCaret | Should -Be 'version'
+        }
+
+        It 'Should exact match command completions [<caretCmd>] <comment> be [version]' -ForEach @(
+            @{ caretCmd = 'vcpkg ver^'          ; comment = 'with word' }
+            @{ caretCmd = '& vcpkg ver^'        ; comment = 'with & word' }
+        ) {
+            $caretCmd | Complete-InputCaret | Should -Be 'version'
+        }
+
+        It 'Should exact match command completions for exe path [<caretCmd>] <comment> be [version]' -ForEach @(
+            @{ caretCmd = './vcpkg ver^'        ; comment = 'with dot slash word' }
+            @{ caretCmd = '& ./vcpkg ver^'      ; comment = 'with & dot slash word' }
+        ) {
+            Set-Location $vcpkgExe.Directory
+            $caretCmd | Complete-InputCaret | Should -Be 'version'
+        }
+    }
+
+    Context 'Complete variant command tests conditionally - WindowsOnly' -Tag WindowsOnly {
+        It 'Should exact match command completions with call operator no-ext absolute exe word be [version]' {
+            "& $vcpkgNoExt ver^" | Complete-InputCaret | Should -Be 'version'
+        }
+
+        It 'Should exact match command completions [<caretCmd>] <comment> be [version]' -ForEach @(
+            @{ caretCmd = '& vcpkg.exe ver^'    ; comment = 'with & extension word' }
+            @{ caretCmd = 'vcpkg.exe ver^'      ; comment = 'with extension word' }
+        ) {
+            $caretCmd | Complete-InputCaret | Should -Be 'version'
+        }
+
+        It 'Should exact match command completions for exe path [<caretCmd>] <comment> be [version]' -ForEach @(
+            @{ caretCmd = '.\vcpkg ver^'        ; comment = 'with dot backslash word' }
+            @{ caretCmd = '& .\vcpkg ver^'      ; comment = 'with & dot backslash word' }
+            @{ caretCmd = './vcpkg.exe ver^'    ; comment = 'with dot slash extension word' }
+            @{ caretCmd = '.\vcpkg.exe ver^'    ; comment = 'with dot backslash extension word' }
+            @{ caretCmd = '& ./vcpkg.exe ver^'  ; comment = 'with & dot slash extension word' }
+            @{ caretCmd = '& .\vcpkg.exe ver^'  ; comment = 'with & dot backslash extension word' }
+        ) {
+            Set-Location $vcpkgExe.Directory
+            $caretCmd | Complete-InputCaret | Should -Be 'version'
+        }
+    }
+
+    Context 'Complete command with spaces tests' {
+        It 'Should complete command [<caretCmd>] <comment> contain [version]' -ForEach @(
+            @{ caretCmd = 'vcpkg      ^'        ; comment = 'many spaces' }
+            @{ caretCmd = 'vcpkg      ver^'     ; comment = 'middle many spaces' }
+            @{ caretCmd = '      vcpkg ver^'    ; comment = 'with leading spaces' }
+            @{ caretCmd = '   &   vcpkg ver^'   ; comment = 'with leading spaces and call operator' }
+        ) {
+            $caretCmd | Complete-InputCaret | Should -Contain 'version'
+        }
+    }
+
+    Context 'Complete command quotation tests' {
+        It "Should fallback to default completion with quoted full word [vcpkg 'install'^]" {
+            "vcpkg 'install'^" | Complete-InputCaret | Should -Be $null
+        }
+
+        It "Should prevent completion for quoted space [vcpkg ' '^]" {
+            "vcpkg ' '^" | Complete-InputCaret | Should -Be $null
+        }
+    }
+}
+
+Describe 'Complete position tests' {
+    Context 'Complete command intermediate tests' {
+        It 'Should exact match command completions [<caretCmd>] <comment> be [version]' -ForEach @(
+            @{ caretCmd = 'vcpkg version^'; comment = 'end of word' }
+            @{ caretCmd = 'vcpkg ver^sion'; comment = 'middle of word' }
+        ) {
+            $caretCmd | Complete-InputCaret | Should -Be 'version'
+        }
+
+        It 'Should exact match command completions [<_>]' -ForEach @(
+            'vcpkg ^version'
+            'vcpkg ^ '
+            'vcpkg   ^   '
+            '   vcpkg   ^   '
+            '   &   vcpkg   ^   '
+            'vcpkg   ^   version   '
+        ) {
+            $completions = $_ | Complete-InputCaret
+            $expected = $VcpkgPredefined.CommandList
+            Compare-Object $completions $expected | Should -BeNullOrEmpty
+        }
+    }
+
+    Context 'Complete complex tests' {
+        It 'Should complete complex command line [<caretCmd>] be [<expected>]' -ForEach (
+            @{ caretCmd = 'echo powershell | % { vcpkg int^egr $_ }; echo $?'; expected = 'integrate' }
+        ) {
+            $caretCmd | Complete-InputCaret | Should -Be $expected
+        }
+    }
+}
+
+Describe 'Impossible command tests' {
+    Context 'Complete non-exist command tests conditionally' {
+        It 'Should prevent completion for non-exist command [vcpkg zzzzzzzz^]' {
+            'vcpkg zzzzzzzz^' | Complete-InputCaret | Should -Be $null
+        }
+
+        It 'Should prevent completion for non-exist command [vcpkg ---^]' {
+            'vcpkg ---^' | Complete-InputCaret | Should -Be $null
+        }
+
+        It 'Should fallback to default for non-exist command with trailing spaces [vcpkg zzzzzzzz ^] - WindowsOnly' -Tag WindowsOnly {
+            'vcpkg zzzzzzzz ^' | Complete-InputCaret | Should -BeLike '.\*'
+        }
+
+        It 'Should fallback to default for non-exist command with trailing spaces [vcpkg zzzzzzzz ^] - NonWindowsOnly' -Tag NonWindowsOnly {
+            'vcpkg zzzzzzzz ^' | Complete-InputCaret | Should -BeLike './*'
+        }
+    }
+
+    Context 'Complete error command tests' {
+        It 'Should prevent error from error command [vcpkg --triplet^]' {
+            { $ErrorActionPreference = 'Stop'; 'vcpkg --triplet^' | Complete-InputCaret } | Should -Not -Throw
+        }
+
+        It 'Should prevent completion for error command [vcpkg --triplet^]' {
+            'vcpkg --triplet^' | Complete-InputCaret | Should -Be $null
+        }
+    }
+}
diff --git a/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-vcpkg.ps1 b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-vcpkg.ps1
new file mode 100644
index 0000000000..50a350ca9b
--- /dev/null
+++ b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-vcpkg.ps1
@@ -0,0 +1,37 @@
+Set-StrictMode -Version Latest
+
+[string]$poshVcpkgModulePath = "$PSScriptRoot/../../scripts/posh-vcpkg.psd1"
+[System.IO.FileInfo]$vcpkgExe = $VcpkgItem
+
+[string]$TestSpecsDir = "$PSScriptRoot/../e2e-specs"
+
+$containerPosh = New-PesterContainer -Path @(
+    "$TestSpecsDir/autocomplete-posh-vcpkg.Tests.ps1"
+) -Data @(
+    @{ 
+        poshVcpkgModulePath = $poshVcpkgModulePath
+        vcpkgExe            = $vcpkgExe
+    }
+)
+
+if (-not (Test-Path variable:IsWindows)) { Set-Variable IsWindows $true }
+
+$configuration = [PesterConfiguration]@{
+    Run    = @{
+        Container = @(
+            $containerPosh
+        )
+    }
+    Output = @{
+        Verbosity = 'Detailed'
+    }
+    Filter = @{
+        ExcludeTag = @{
+            NonWindowsOnly = -not $IsWindows
+            WindowsOnly    = $IsWindows
+            CoreOnly       = 'Core' -eq $PSEdition
+        }.GetEnumerator().Where{ -not $_.Value }.ForEach{ $_.Name }
+    }
+}
+
+Invoke-Pester -Configuration $configuration
diff --git a/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z-fail-linux.ps1 b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z-fail-linux.ps1
new file mode 100644
index 0000000000..c48ccdeb6f
--- /dev/null
+++ b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z-fail-linux.ps1
@@ -0,0 +1,11 @@
+
+Write-Host 'Fail for Linux.'
+
+if ($IsLinux) {
+    BeforeAll {
+        Import-Module $PSScriptRoot/posh-vcpkg
+    }
+    Describe 'Module posh-vcpkg tests' {
+        It 'Expect fail with BeforeAll' {}
+    }
+}
diff --git a/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z-fail-win.ps1 b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z-fail-win.ps1
new file mode 100644
index 0000000000..2c79bfeac4
--- /dev/null
+++ b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z-fail-win.ps1
@@ -0,0 +1,14 @@
+
+Write-Host 'Fail for Windows.'
+
+if ($IsWindows) {
+    BeforeAll {
+        Import-Module $PSScriptRoot/../../scripts/posh-vcpkg.psd1
+    }
+    Describe 'Module posh-vcpkg tests' {
+        It 'Expect pass' {}
+        It 'Expect fail with InvalidResult' {
+            Should -Be 'fail'
+        }
+    }
+}
\ No newline at end of file