# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
Describe "PSVersionTable" -Tags "CI" {

    BeforeAll {
        $sma = Get-Item (Join-Path $PSHOME "System.Management.Automation.dll")
        $formattedVersion = $sma.VersionInfo.ProductVersion

        $mainVersionPattern = "(\d+\.\d+\.\d+)(-.+)?"
        $fullVersionPattern = "^(\d+\.\d+\.\d+)(-.+)?-(\d+)-g(.+)$"

        $expectedPSVersion = ($formattedVersion -split " ")[0]
        $expectedVersionPattern = "^$mainVersionPattern$"

        if ($formattedVersion.Contains(" Commits: "))
        {
            $rawGitCommitId = $formattedVersion.Replace(" Commits: ", "-").Replace(" SHA: ", "-g")
            $expectedGitCommitIdPattern = $fullVersionPattern
            $unexpectectGitCommitIdPattern = "qwerty"
        } else {
            $rawGitCommitId = ($formattedVersion -split " SHA: ")[0]
            $expectedGitCommitIdPattern = "^$mainVersionPattern$"
            $unexpectectGitCommitIdPattern = $fullVersionPattern
        }

        $powerShellVersions = "1.0", "2.0", "3.0", "4.0", "5.0", "5.1", "6.0", "6.1", "6.2", "7.0", "7.1", "7.2"
        $powerShellCompatibleVersions = $PSVersionTable.PSCompatibleVersions |
            ForEach-Object {$_.ToString(2).SubString(0,3)}
    }

    It "Should have version table entries" {
       $PSVersionTable.Count | Should -Be 9
    }

    It "Should have the right version table entries" {
       $PSVersionTable.ContainsKey("PSVersion")                 | Should -BeTrue
       $PSVersionTable.ContainsKey("PSEdition")                 | Should -BeTrue
       $PSVersionTable.ContainsKey("WSManStackVersion")         | Should -BeTrue
       $PSVersionTable.ContainsKey("SerializationVersion")      | Should -BeTrue
       $PSVersionTable.ContainsKey("PSCompatibleVersions")      | Should -BeTrue
       $PSVersionTable.ContainsKey("PSRemotingProtocolVersion") | Should -BeTrue
       $PSVersionTable.ContainsKey("GitCommitId")               | Should -BeTrue
       $PSVersionTable.ContainsKey("Platform")                  | Should -BeTrue
       $PSVersionTable.ContainsKey("OS")                        | Should -BeTrue

    }

    It "PSVersion property" {
       $PSVersionTable.PSVersion | Should -BeOfType System.Management.Automation.SemanticVersion
       $PSVersionTable.PSVersion | Should -BeExactly $expectedPSVersion
       $PSVersionTable.PSVersion | Should -Match $expectedVersionPattern
       $PSVersionTable.PSVersion.Major | Should -Be 7
    }

    It "GitCommitId property" {
       $PSVersionTable.GitCommitId | Should -BeOfType System.String
       $PSVersionTable.GitCommitId | Should -Match $expectedGitCommitIdPattern
       $PSVersionTable.GitCommitId | Should -Not -Match $unexpectectGitCommitIdPattern
       $PSVersionTable.GitCommitId | Should -BeExactly $rawGitCommitId
    }

    It "Should have the correct platform info" {
       $platform = [String][System.Environment]::OSVersion.Platform
       [String]$PSVersionTable["Platform"] | Should -Be $platform
    }

    It "Should have the correct OS info" {
       if ($IsCoreCLR)
       {
           $OSDescription = [String][System.Runtime.InteropServices.RuntimeInformation]::OSDescription
           [String]$PSVersionTable["OS"] | Should -Be $OSDescription
       }
       else
       {
           $OSDescription = [String][System.Environment]::OSVersion
           [String]$PSVersionTable["OS"] | Should -Be $OSDescription
       }
    }

    It "Verify `$PSVersionTable.PSEdition" {
        if ($IsCoreCLR) {
            $edition = "Core"
        }
        else
        {
            $edition = "Desktop"
        }
        $PSVersionTable["PSEdition"] | Should -Be $edition
    }

    It "Verify `$PSVersionTable is ordered and 'PSVersion' is on first place" {
        $PSVersionName = "PSVersion"
        $keys1 = ($PSVersionTable | Format-Table -HideTableHeaders -Property Name | Out-String) -split [System.Environment]::NewLine | Where-Object {$_} | ForEach-Object {$_.Trim()}

        $keys1[0] | Should -Be "PSVersion"
        $keys1[1] | Should -Be "PSEdition"

        $keys1last = $keys1[2..($keys1.length-1)]
        $keys1sortedlast = $keys1last | Sort-Object

        Compare-Object -ReferenceObject $keys1last -DifferenceObject $keys1sortedlast -SyncWindow 0 | Should -Be $null
    }

    It "Verify `$PSVersionTable can be formatted correctly when it has non-string key" {
        try {
            $key = Get-Item $PSScriptRoot
            $PSVersionTable.Add($key, "TEST")
            { $PSVersionTable | Format-Table } | Should -Not -Throw
        } finally {
            $PSVersionTable.Remove($key)
        }
    }

    It "Verify `$PSVersionTable can be formatted correctly when 'PSVersion' is removed" {
        try {
            $VersionValue = $PSVersionTable["PSVersion"]
            $PSVersionTable.Remove("PSVersion")

            $keys1 = ($PSVersionTable | Format-Table -HideTableHeaders -Property Name | Out-String) -split [System.Environment]::NewLine | Where-Object {$_} | ForEach-Object {$_.Trim()}
            $keys1[0] | Should -Be "PSEdition"
            $keys1.Length | Should -Be $PSVersionTable.Count

            $keys1last = $keys1[1..($keys1.length-1)]
            $keys1sortedlast = $keys1last | Sort-Object
            Compare-Object -ReferenceObject $keys1last -DifferenceObject $keys1sortedlast -SyncWindow 0 | Should -Be $null
        } finally {
            $PSVersionTable.Add("PSVersion", $VersionValue)
        }
    }

    It "Verify `$PSVersionTable can be formatted correctly when 'PSEdition' is removed" {
        try {
            $EditionValue = $PSVersionTable["PSEdition"]
            $PSVersionTable.Remove("PSEdition")

            $keys1 = ($PSVersionTable | Format-Table -HideTableHeaders -Property Name | Out-String) -split [System.Environment]::NewLine | Where-Object {$_} | ForEach-Object {$_.Trim()}
            $keys1[0] | Should -Be "PSVersion"
            $keys1.Length | Should -Be $PSVersionTable.Count

            $keys1last = $keys1[1..($keys1.length-1)]
            $keys1sortedlast = $keys1last | Sort-Object
            Compare-Object -ReferenceObject $keys1last -DifferenceObject $keys1sortedlast -SyncWindow 0 | Should -Be $null
        } finally {
            $PSVersionTable.Add("PSEdition", $EditionValue)
        }
    }

    It "Verify `$PSVersionTable can be formatted correctly when both 'PSEdition' and 'PSVersion' are removed" {
        try {
            $VersionValue = $PSVersionTable["PSVersion"]
            $EditionValue = $PSVersionTable["PSEdition"]
            $PSVersionTable.Remove("PSVersion")
            $PSVersionTable.Remove("PSEdition")

            $keys1 = ($PSVersionTable | Format-Table -HideTableHeaders -Property Name | Out-String) -split [System.Environment]::NewLine | Where-Object {$_} | ForEach-Object {$_.Trim()}
            $keys1.Length | Should -Be $PSVersionTable.Count

            $keys1sortedlast = $keys1 | Sort-Object
            Compare-Object -ReferenceObject $keys1 -DifferenceObject $keys1sortedlast -SyncWindow 0 | Should -Be $null
        } finally {
            $PSVersionTable.Add("PSVersion", $VersionValue)
            $PSVersionTable.Add("PSEdition", $EditionValue)
        }
    }

    It "Verify PSCompatibleVersions has an entry for all known versions of PowerShell" {
        foreach ($version in $powerShellVersions) {
            $version | Should -BeIn $powerShellCompatibleVersions
        }
    }

    It "Verify PSCompatibleVersions has no unknown PowerShell entries" {
        foreach ($version in $powerShellCompatibleVersions) {
            $version | Should -BeIn $powerShellVersions
        }
    }
}