diff --git a/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-vcpkg.Test.ps1 b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-vcpkg.Test.ps1
new file mode 100644
index 0000000000..e915e705c0
--- /dev/null
+++ b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-vcpkg.Test.ps1
@@ -0,0 +1,180 @@
+BeforeAll {
+    Import-Module $PSScriptRoot/../../scripts/posh-vcpkg.psd1
+}
+
+Describe 'Module posh-vcpkg tests' {
+
+    BeforeAll {
+
+        function Complete-InputCaret {
+            [OutputType([string[]])]
+            param (
+                [Parameter(Mandatory, Position = 0, ValueFromPipeline)]
+                [string]$caretCursorCommand
+            )
+            $positionMatches = [regex]::Matches($caretCursorCommand, '\^')
+            if ($positionMatches.Count -ne 1) {
+                throw 'Invalid caret cursor command, please indicate by only one ^ character'
+            }
+            $command = [string]$caretCursorCommand.Replace('^', '')
+            $cursorPosition = [int]$positionMatches[0].Index
+            $result = [System.Management.Automation.CommandCompletion]::CompleteInput($command, $cursorPosition, $null)
+            # Write-Host ( $result.CompletionMatches | Select-Object -ExpandProperty CompletionText)
+            return $result.CompletionMatches | Select-Object -ExpandProperty CompletionText
+        }
+
+    }
+
+    Context 'Internal function tests' {
+
+        It 'Complete-InputCaret 1 caret string should success' {
+            'aaaa^' | Complete-InputCaret | Should -BeNullOrEmpty
+        }
+
+        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 'Complete command name tests' {
+
+        It 'Should complete command list with blank space [vcpkg ^] - <expected>' -ForEach (
+            @(
+                , 'help'
+                , 'install'
+                , 'list'
+                , 'remove'
+                , 'version'
+            ) | ForEach-Object { @{Expected = $_ } }
+        ) {
+            'vcpkg ^' | Complete-InputCaret | Should -Contain $expected
+        }
+
+    }
+
+
+
+    # Context 'Complete command name tests' {
+
+    #     It -Skip 'Should complete command list with blank space [<caretCmd>]' -TestCases (
+    #         @{ caretCmd = 'vcpkg ^'          ; expectedContain = 'version'; comment = 'without word' },
+    #         @{ caretCmd = 'vcpkg ver^'       ; expectedContain = 'version'; comment = 'with word' },
+    #         @{ caretCmd = 'vcpkg.exe ver^'   ; expectedContain = 'version'; comment = 'with native exe' },
+    #         @{ caretCmd = './vcpkg ver^'     ; expectedContain = 'version'; comment = 'with dot slash' },
+    #         @{ caretCmd = '.\vcpkg ver^'     ; expectedContain = 'version'; comment = 'with dot backslash' }
+    #     ) {
+    #         param($caretCmd, $expectedContain, $comment)
+    #         $caretCmd | Complete-InputCaret | Should -Contain $expectedContain
+    #     }
+
+    #     It -Skip 'Should complete command word [<expectedContain>] with [<caretCmd>] with <comment>' -TestCases (
+    #         @{ caretCmd = 'vcpkg ^'          ; expectedContain = 'version'; comment = 'without word' },
+    #         @{ caretCmd = 'vcpkg ver^'       ; expectedContain = 'version'; comment = 'with word' },
+    #         @{ caretCmd = 'vcpkg.exe ver^'   ; expectedContain = 'version'; comment = 'with native exe' },
+    #         @{ caretCmd = './vcpkg ver^'     ; expectedContain = 'version'; comment = 'with dot slash' },
+    #         @{ caretCmd = '.\vcpkg ver^'     ; expectedContain = 'version'; comment = 'with dot backslash' }
+    #     ) {
+    #         param($caretCmd, $expectedContain, $comment)
+    #         $caretCmd | Complete-InputCaret | Should -Contain $expectedContain
+    #     }
+
+    # }
+
+    # Context -Skip 'Complete command spaces tests' {
+
+    #     It 'Should complete command <comment> [<caretCmd>]' -TestCases (
+    #         @{ comment = 'spaces without argument'; caretCmd = 'vcpkg     ^'; expectedContain = 'version' },
+    #         @{ comment = 'before remaining'; caretCmd = 'vcpkg     ver^'; expectedContain = 'version' },
+    #         # @{ comment = 'with trailing spaces'; caretCmd = 'vcpkg ver     ^'; expectedContain = 'version' },
+    #         @{ comment = 'with leading spaces'; caretCmd = '     vcpkg ver^'; expectedContain = 'version' }
+    #     ) {
+    #         param($caretCmd, $expectedContain, $comment)
+    #         $caretCmd | Complete-InputCaret | Should -Contain $expectedContain
+    #     }
+
+    #     It 'Should complete command with trailing spaces [vcpkg ver     ^]' -Skip {
+    #         'vcpkg ver     ^' | Complete-InputCaret | Should -Contain 'version'
+    #     }
+
+    # }
+
+    # Context -Skip 'Complete command quotation tests' {
+
+    #     It "Should complete command with quoted word [vcpkg 'ver'^]" {
+    #         "vcpkg 'ver'^" | Complete-InputCaret | Should -Contain 'version'
+    #     }
+
+    #     It "Should complete command with quoted space [vcpkg ' '^]" {
+    #         "vcpkg 'ver'^" | Complete-InputCaret | Should -Contain 'version'
+    #     }
+
+    #     It "Should complete command with quoted word [vcpkg 'version'^]" {
+    #         "vcpkg 'ver'^" | Complete-InputCaret | Should -Contain 'version'
+    #     }
+
+    # }
+
+    # Context -Skip 'Complete command intermediate tests' {
+
+    #     It 'Should complete command <comment> [<caretCmd>]' -TestCases (
+    #         @{ comment = 'end of word'; caretCmd = 'vcpkg version^'; expectedContain = 'version' },
+    #         @{ comment = 'middle of word'; caretCmd = 'vcpkg ver^sion'; expectedContain = 'version' },
+    #         @{ comment = 'front of word'; caretCmd = 'vcpkg ^version'; expectedContain = 'version' }
+    #     ) {
+    #         param($caretCmd, $expectedContain, $comment)
+    #         $caretCmd | Complete-InputCaret | Should -Contain $expectedContain
+    #     }
+
+    # }
+
+    # Context -Skip 'Complete subcommand tests' {
+
+    #     It 'Should complete subcommand [<expected>] from [<caretCmd>]' -TestCases (
+    #         @{ caretCmd = 'vcpkg depend^'; expected = 'depend-info' },
+    #         @{ caretCmd = 'vcpkg inst^'; expected = 'install' },
+    #         @{ caretCmd = 'vcpkg int^'; expected = 'integrate' },
+    #         @{ caretCmd = 'vcpkg rem^'; expected = 'remove' }
+    #     ) {
+    #         param($caretCmd, $expected)
+    #         @($caretCmd | Complete-InputCaret)[0] | Should -BeExactly $expected
+    #     }
+
+    #     It 'Should complete subcommand two-level [powershell] from [vcpkg integrate power^]' -Skip {
+    #         'vcpkg integrate power^' | Complete-InputCaret | Should -Contain 'powershell'
+    #     }
+
+    # }
+
+    # Context -Skip 'Complete subcommand argument and options tests' {
+
+    #     It 'Should complete argument [<expected>] from [<caretCmd>]' -TestCases (
+    #         @{ caretCmd = 'vcpkg install vcpkg-cmake^'; expectedContain = 'vcpkg-cmake-get-vars' },
+    #         @{ caretCmd = 'vcpkg install vcpkg-cmake --^'; expectedContain = '--dry-run' }
+    #     ) {
+    #         param($caretCmd, $expected)
+    #         $caretCmd | Complete-InputCaret | Should -Contain $expectedContain
+    #     }
+
+    # }
+
+    # Context -Skip 'Complete complex tests' {
+
+    #     It 'Should complete complex line [<expected>] from [<caretCmd>]' -TestCases (
+    #         @{ caretCmd = 'echo powershell | % { vcpkg ver^ $_ }; echo $?'; expectedContain = 'version' }
+    #     ) {
+    #         param($caretCmd, $expected)
+    #         $caretCmd | Complete-InputCaret | Should -Contain $expectedContain
+    #     }
+
+    # }
+
+}
diff --git a/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z.Spec.ps1 b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z.Spec.ps1
new file mode 100644
index 0000000000..7700a43a67
--- /dev/null
+++ b/azure-pipelines/end-to-end-tests-dir/autocomplete-posh-z.Spec.ps1
@@ -0,0 +1,6 @@
+
+Write-Host "It's spec."
+
+if ($IsLinux -or $IsWindows) {
+    throw 'It is an error for end-to-end-tests.ps1 on Linux or Windows.'
+}