ModuleFast.tests.ps1

using namespace System.Management.Automation
using namespace Microsoft.PowerShell.Commands
using namespace System.Collections.Generic
using namespace System.Diagnostics.CodeAnalysis
using namespace NuGet.Versioning
using namespace ModuleFast

$env:MODULEFASTDEBUG = $true
Import-Module $PSScriptRoot/ModuleFast.psd1 -Force

BeforeAll {
  if ($env:MFURI) {
    $PSDefaultParameterValues['*-ModuleFast*:Source'] = $env:MFURI
  }
}

# ModuleFastSpec is a public C# class — no InModuleScope needed
Describe 'ModuleFastSpec' {
  Context 'Constructors' {
    It 'Getters' {
      $spec = [ModuleFastSpec]'Test'
      'Name', 'Guid', 'Min', 'Max', 'Required' | ForEach-Object {
        $spec.PSObject.Properties.name | Should -Contain $PSItem
      }
    }

    It 'Name' {
      $spec = [ModuleFastSpec]'Test'
      $spec.Name | Should -Be 'Test'
      $spec.Guid | Should -Be ([Guid]::Empty)
      $spec.Min | Should -BeNull
      $spec.Max | Should -BeNull
      $spec.Required | Should -BeNull
    }

    It 'Has non-settable properties' {
      $spec = [ModuleFastSpec]'Test'
      { $spec.Min = '1' } | Should -Throw
      { $spec.Max = '1' } | Should -Throw
      { $spec.Required = '1' } | Should -Throw
      { $spec.Name = 'fake' } | Should -Throw
      { $spec.Guid = New-Guid } | Should -Throw
    }

    It 'ModuleSpecification' {
      $in = [ModuleSpecification]@{
        ModuleName    = 'Test'
        ModuleVersion = '2.1.5'
      }
      $spec = [ModuleFastSpec]$in
      $spec.Name | Should -Be 'Test'
      $spec.Guid | Should -Be ([Guid]::Empty)
      $spec.Min | Should -Be '2.1.5'
      $spec.Max | Should -BeNull
      $spec.Required | Should -BeNull
    }
  }

  Context 'ModuleSpecification Conversion' {
    It 'Name' {
      $spec = [ModuleSpecification][ModuleFastSpec]'Test'
      $spec.Name | Should -Be 'Test'
      $spec.Version | Should -Be '0.0'
      $spec.RequiredVersion | Should -BeNull
      $spec.MaximumVersion | Should -BeNull
    }
    It 'RequiredVersion' {
      $spec = [ModuleSpecification][ModuleFastSpec]::new('Test', '1.2.3')
      $spec.Name | Should -Be 'Test'
      $spec.RequiredVersion | Should -Be '1.2.3.0'
      $spec.Version | Should -BeNull
      $spec.MaximumVersion | Should -BeNull
    }
  }
}

Describe 'Install-ModuleFast -Plan' -Tag 'E2E' {
  BeforeAll {
    $SCRIPT:__existingPSModulePath = $env:PSModulePath
    $env:PSModulePath = $testDrive

    $SCRIPT:__existingProgressPreference = $ProgressPreference
    $ProgressPreference = 'SilentlyContinue'


  }
  AfterAll {
    $env:PSModulePath = $SCRIPT:__existingPSModulePath
    $ProgressPreference = $SCRIPT:__existingProgressPreference
  }

  Context 'Parameter Binding' {
    #This is used for testcases
    $SCRIPT:moduleName = 'Az.Accounts'

    Context 'ModuleFastSpec' {
      $moduleSpecTestCases = (
        @{
          Test  = 'Name';
          Spec  = $SCRIPT:moduleName;
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3'
          }
        },
        @{
          Test  = 'ModuleSpecification Name';
          Spec  = [ModuleSpecification]::new($SCRIPT:moduleName);
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3'
          }
        },
        @{
          Test  = 'ModuleSpecification MinimumVersion';
          Spec  = [ModuleSpecification]::new(@{ ModuleName = $SCRIPT:moduleName; ModuleVersion = '0.0.0' })
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3'
          }
        },
        @{
          Test  = 'ModuleSpecification RequiredVersion';
          Spec  = [ModuleSpecification]::new(@{ ModuleName = $SCRIPT:moduleName; RequiredVersion = '2.7.3' })
          Check = {
            $actual.ModuleVersion | Should -Be '2.7.3'
          }
        },
        @{
          Test  = 'ModuleSpecification MaximumVersion';
          Spec  = [ModuleSpecification]::new(@{ ModuleName = $SCRIPT:moduleName; MaximumVersion = '2.7.3' })
          Check = {
            $actual.ModuleVersion | Should -Be '2.7.3'
          }
        }
      )

      It 'Gets Module with Parameter: <Test>' {
        $actual = Install-ModuleFast $Spec -Plan
        $actual | Should -HaveCount 1
        $ModuleName | Should -Be $actual.Name
        $actual.ModuleVersion | Should -Not -BeNullOrEmpty
        if ($Check) { . $Check }
      } -TestCases $moduleSpecTestCases

      It 'Gets Module with Pipeline: <Test>' {
        $actual = $Spec | Install-ModuleFast -Plan
        $actual | Should -HaveCount 1
        $ModuleName | Should -Be $actual.Name
        $actual.ModuleVersion | Should -Not -BeNullOrEmpty
        if ($Check) { . $Check }
      } -TestCases $moduleSpecTestCases
    }

    Context 'StrictSemVer Parameter' {
      It 'StrictSemVer matches prereleases with exclusive upper bound' {
        $actual = Install-ModuleFast 'PrereleaseTest!<0.0.2' -StrictSemVer -Plan
        $actual | Should -HaveCount 1
        $actual.ModuleVersion.IsPrerelease | Should -Be $true
        $actual.ModuleVersion.Patch | Should -Be 2
      }
      It 'StrictSemVer not specified does not match prereleases with exclusive upper bound' {
        $actual = Install-ModuleFast 'PrereleaseTest!<0.0.2' -Plan
        $actual | Should -HaveCount 1
        $actual.ModuleVersion.IsPrerelease | Should -Be $false
        $actual.ModuleVersion.Patch | Should -Be 1
      }
    }

    Context 'ModuleFastSpec String' {
      $stringTestCases = (
        @{
          Spec  = 'Az.Accounts'
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3'
          }
        },
        @{
          Spec  = 'Az.Accounts=2.7.3'
          Check = {
            $actual.ModuleVersion | Should -Be '2.7.3'
          }
        },
        @{
          Spec  = 'Az.Accounts>2.7.3'
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3'
          }
        },
        @{
          Spec  = 'Az.Accounts<2.7.3'
          Check = {
            $actual.ModuleVersion | Should -BeLessThan '2.7.3'
          }
        },
        @{
          Spec  = 'Az.Accounts<=2.7.3'
          Check = {
            $actual.ModuleVersion | Should -Be '2.7.3'
          }
        },
        @{
          Spec  = 'Az.Accounts>=2.7.3'
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3'
          }
        },
        @{
          Spec  = 'Az.Accounts:2.7.3'
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3' -Because 'With NuGet syntax, a bare version is a minimum version, not a requiredversion'
          }
        },
        @{
          Spec  = 'Az.Accounts:[2.7.3]'
          Check = {
            $actual.ModuleVersion | Should -Be '2.7.3'
          }
        },
        @{
          Spec  = 'Az.Accounts:(,2.7.3)'
          Check = {
            $actual.ModuleVersion | Should -BeLessThan '2.7.3'
          }
        },
        @{
          Spec  = '@{ModuleName = ''Az.Accounts''; ModuleVersion = ''2.7.3''}'
          Check = {
            $actual.ModuleVersion | Should -BeGreaterThan '2.7.3'
          }
        },
        @{
          Spec  = '@{ModuleName = ''Az.Accounts''; RequiredVersion = ''2.7.3''}'
          Check = {
            $actual.ModuleVersion | Should -Be '2.7.3'
          }
        },
        @{
          Spec       = 'PrereleaseTest'
          Check      = {
            $actual.Name | Should -Be 'PrereleaseTest'
            $actual.ModuleVersion | Should -Be '0.0.1'
          }
          ModuleName = 'PrereleaseTest'
        },
        @{
          Spec       = 'PrereleaseTest!'
          Check      = {
            $actual.Name | Should -Be 'PrereleaseTest'
            $actual.ModuleVersion | Should -Be '0.0.2-prerelease'
          }
          ModuleName = 'PrereleaseTest'
        },
        @{
          Spec       = '!PrereleaseTest'
          Check      = {
            $actual.Name | Should -Be 'PrereleaseTest'
            $actual.ModuleVersion | Should -Be '0.0.2-prerelease'
          }
          ModuleName = 'PrereleaseTest'
        },
        @{
          Spec       = 'PrereleaseTest!<=0.0.1'
          Check      = {
            $actual.Name | Should -Be 'PrereleaseTest'
            $actual.ModuleVersion | Should -Be '0.0.1'
          }
          ModuleName = 'PrereleaseTest'
        },
        @{
          Spec       = 'PrereleaseTest>=0.0.1-prerelease'
          Check      = {
            $actual.Name | Should -Be 'PrereleaseTest'
            $actual.ModuleVersion | Should -Be '0.0.2-prerelease'
          }
          ModuleName = 'PrereleaseTest'
        },
        @{
          Spec       = 'PrereleaseTest:*'
          ModuleName = 'PrereleaseTest'
        },
        @{
          Spec       = 'ImportExcel<2'
          ModuleName = 'ImportExcel'
          Check      = {
            $actual.ModuleVersion | Should -Be '1.99.0' #Nuget changes this to 1.99
          }
        },
        # Special cases where the upper bound is specified as exclusive, ignore prereleases
        @{
          Spec       = 'PrereleaseTest!<0.0.2'
          ModuleName = 'PrereleaseTest'
          Check      = {
            $actual.ModuleVersion | Should -Be '0.0.1'
          }
        },
        @{
          Spec       = 'PrereleaseTest!<=0.0.2'
          ModuleName = 'PrereleaseTest'
          Check      = {
            $actual.ModuleVersion | Should -Be '0.0.2-prerelease'
          }
        },
        @{
          # Test lexical matching. This should not match the 'prerelease' version because r is after p
          Spec       = 'PrereleaseTest!:(0.0.2-rIsAfterP,0.0.2)'
          ModuleName = 'PrereleaseTest'
          Check      = {
            [string]$actual | Should -Match 'a matching module was not found'
          }
        },
        @{
          Spec       = 'PrereleaseTest!<0.0.2-prerelease'
          ModuleName = 'PrereleaseTest'
          Check      = {
            [string]$actual.ModuleVersion | Should -Be '0.0.2-newerversion'
          }
        },
        @{
          Spec       = 'PrereleaseTest!:(0.0.2-alpha,0.0.2)'
          ModuleName = 'PrereleaseTest'
          Check      = {
            [string]$actual.ModuleVersion | Should -Be '0.0.2-prerelease'
          }
        },
        @{
          Spec       = 'PrereleaseTest!:(0.0.2-alpha,0.0.2-prerelease)'
          ModuleName = 'PrereleaseTest'
          Check      = {
            [string]$actual.ModuleVersion | Should -Be '0.0.2-newerversion'
          }
        },
        #End special cases
        @{
          Spec       = 'PnP.PowerShell:2.2.*'
          ModuleName = 'PnP.PowerShell'
          Check      = {
            $actual.ModuleVersion | Should -Be '2.2.0'
          }
        },
        @{
          Spec       = 'ConnectWiseManageAPI=0.4.15.0'
          ModuleName = 'ConnectWiseManageAPI'
          Check      = {
            $actual.ModuleVersion | Should -Be '0.4.15' #Install module version is 0.4.15.0 but nuget truncates this
          }
        }
      )

      It 'Fails if hashtable-style string parameter is not a modulespec' {
        { Install-ModuleFast '@{ModuleName = ''Az.Accounts''; ModuleVersion = ''2.7.3''; InvalidParameter = ''ThisShouldNotBeValid''}' -Plan -ErrorAction Stop }
        | Should -Throw '*not valid ModuleSpecification syntax*'
      }

      It 'Gets Module with String Parameter: <Spec>' {
        try {
          $actual = Install-ModuleFast $Spec -Plan
          $actual | Should -HaveCount 1
          $ModuleName | Should -Be $actual.Name
          $actual.ModuleVersion | Should -Not -BeNullOrEmpty
        } catch {
          $actual = $PSItem
        }
        if ($Check) { . $Check }

      } -TestCases $stringTestCases

      It 'Gets Module with String Pipeline: <Spec>' {
        try {
          $actual = $Spec | Install-ModuleFast -Plan
          $actual | Should -HaveCount 1
          $ModuleName | Should -Be $actual.Name
          $actual.ModuleVersion | Should -Not -BeNullOrEmpty
        } catch {
          $actual = $PSItem
        }
        if ($Check) { . $Check }
      } -TestCases $stringTestCases
    }

    Context 'ModuleFastSpec Combinations' {
      It 'Strings as Parameter' {
        $actual = Install-ModuleFast 'Az.Accounts', 'Az.Compute', 'ImportExcel' -Plan
        $actual | Should -HaveCount 3
        $actual | ForEach-Object {
          $PSItem.Name | Should -BeIn 'Az.Accounts', 'Az.Compute', 'ImportExcel'
          $PSItem.ModuleVersion | Should -BeGreaterThan '1.0'
        }
      }
      It 'Strings as Pipeline' {
        $actual = 'Az.Accounts', 'Az.Compute', 'ImportExcel' | Install-ModuleFast -Plan
        $actual | Should -HaveCount 3
        $actual | ForEach-Object {
          $PSItem.Name | Should -BeIn 'Az.Accounts', 'Az.Compute', 'ImportExcel'
          $PSItem.ModuleVersion | Should -BeGreaterThan '1.0'
        }
      }
      It 'Plan output is sorted alphabetically by module name' {
        $actual = Install-ModuleFast 'Az.Compute', 'Az.Accounts' -Plan
        $actual | Should -HaveCount 2
        ($actual | Select-Object -ExpandProperty Name) | Should -Be @('Az.Accounts', 'Az.Compute')
      }
      It 'ModuleSpecs as Parameter' {
        $actual = Install-ModuleFast 'Az.Accounts', '@{ModuleName = "Az.Compute"; ModuleVersion = "1.0.0" }', ([ModuleSpecification]::new('ImportExcel')) -Plan
        $actual | Should -HaveCount 3
        $actual | ForEach-Object {
          $PSItem.Name | Should -BeIn 'Az.Accounts', 'Az.Compute', 'ImportExcel'
          $PSItem.ModuleVersion | Should -BeGreaterThan '1.0'
        }
      }
      It 'ModuleSpecs as Pipeline' {
        $actual = 'Az.Accounts>1', '@{ModuleName = "Az.Compute"; ModuleVersion = "1.0.0" }', ([ModuleSpecification]::new('ImportExcel')) | Install-ModuleFast -Plan
        $actual | Should -HaveCount 3
        $actual | ForEach-Object {
          $PSItem.Name | Should -BeIn 'Az.Accounts', 'Az.Compute', 'ImportExcel'
          $PSItem.ModuleVersion | Should -BeGreaterThan '1.0'
        }
      }

      It 'Prerelease does not affect non-prerelease' {
        #The prerelease flag on az.accounts should not trigger prerelease on PrereleaseTest
        $actual = 'Az.Accounts!', 'PrereleaseTest' | Install-ModuleFast -Plan
        $actual | Should -HaveCount 2
        $actual | Where-Object Name -EQ 'PrereleaseTest' | ForEach-Object {
          $PSItem.ModuleVersion | Should -Be '0.0.1'
        }
      }
      It '-Prerelease overrides even if prerelease is not specified' {
        #The prerelease flag on az.accounts should not trigger prerelease on PrereleaseTest
        $actual = 'Az.Accounts!', 'PrereleaseTest' | Install-ModuleFast -Prerelease -Plan
        $actual | Should -HaveCount 2
        $actual | Where-Object Name -EQ 'PrereleaseTest' | ForEach-Object {
          $PSItem.ModuleVersion | Should -Be '0.0.2-prerelease'
        }
      }
    }
  }

  It 'Errors on Unsupported Object instead of Stringifying' {
    { Install-ModuleFast [Tuple]::Create('Az.Accounts') -Plan -ErrorAction Stop }
    | Should -Throw '*Cannot bind parameter*'
  }
  It 'Gets Module with 1 dependency' {
    Install-ModuleFast 'Az.Compute' -Plan | Should -HaveCount 2
  }
  It 'Gets all dependencies for a Module with lots of dependencies (Az)' {
    Install-ModuleFast @{ModuleName = 'Az'; RequiredVersion = '11.1.0' } -Plan | Should -HaveCount 86
  }
  It 'Gets Module with 4 section version number and a 4 section version number dependency (VMware.VimAutomation.Common)' {
    Install-ModuleFast 'VMware.VimAutomation.Common' -Plan | Should -HaveCount 2
  }
  It 'Gets multiple modules' {
    Install-ModuleFast @{ModuleName = 'Az'; RequiredVersion = '11.1.0' }, @{ModuleName = 'VMWare.PowerCli'; RequiredVersion = '13.2.0.22746353' } -Plan
    | Should -HaveCount 122
  }

  It 'Casts to ModuleSpecification' {
    $actual = (Install-ModuleFast 'Az.Accounts' -Plan) -as [Microsoft.PowerShell.Commands.ModuleSpecification]
    $actual | Should -BeOfType [Microsoft.PowerShell.Commands.ModuleSpecification]
    $actual.Name | Should -Be 'Az.Accounts'
    $actual.RequiredVersion | Should -BeGreaterThan '2.7.3'
  }

  It 'Filters Prerelease Modules by Default' {
    $actual = Install-ModuleFast 'PrereleaseTest' -Plan
    $actual.ModuleVersion | Should -Be '0.0.1'
  }
  It 'Shows Prerelease Modules if Prerelease is specified' {
    $actual = Install-ModuleFast 'PrereleaseTest' -Prerelease -Plan
    $actual.ModuleVersion | Should -Be '0.0.2-prerelease'
  }
  It 'Detects Prerelease even if Prerelease not specified' {
    $actual = Install-ModuleFast 'PrereleaseTest=0.0.2-prerelease' -Plan
    $actual.ModuleVersion | Should -Be '0.0.2-prerelease'
  }

}

Describe 'Install-ModuleFast' -Tag 'E2E' {
  BeforeAll {
    $SCRIPT:__existingPSModulePath = $env:PSModulePath
    filter Limit-ModulePath {
      param(
        [string]$path,

        [Parameter(ValueFromPipeline)]
        [Management.Automation.PSModuleInfo]$InputObject
      )
      if ($PSItem.Path.StartsWith($path)) {
        return $PSItem
      }
    }
  }
  BeforeEach {
    #Remove all PSModulePath to not affect existing environment
    $installTempPath = Join-Path $testdrive $(New-Guid)
    New-Item -ItemType Directory -Path $installTempPath -ErrorAction stop
    $env:PSModulePath = $installTempPath

    [SuppressMessageAttribute(
      <#Category#>'PSUseDeclaredVarsMoreThanAssignments',
      <#CheckId#>$null,
      Justification = 'PSScriptAnalyzer doesnt see the connection between beforeeach and Describe/It'
    )]
    $imfParams = @{
      Destination          = $installTempPath
      NoProfileUpdate      = $true
      NoPSModulePathUpdate = $true
      # Confirm              = $false
    }
  }
  AfterAll {
    $env:PSModulePath = $SCRIPT:__existingPSModulePath
  }
  It 'Installs Module' {
    #HACK: The testdrive mount is not available in the threadjob runspaces so we need to translate it
    Install-ModuleFast @imfParams 'Az.Accounts'
    Get-Item $installTempPath\Az.Accounts\*\Az.Accounts.psd1 | Should -Not -BeNullOrEmpty
  }
  It '4 section version numbers (VMware.PowerCLI)' {
    $actual = Install-ModuleFast @imfParams 'VMware.VimAutomation.Common=13.2.0.22643733' -PassThru
    Get-Item $installTempPath\VMware*\*\*.psd1 | ForEach-Object {
      $moduleFolderVersion = $_ | Split-Path | Split-Path -Leaf
      Import-PowerShellDataFile -Path $_.FullName | Select-Object -ExpandProperty ModuleVersion | Should -Be $moduleFolderVersion
    }
    Get-Module VMWare* -ListAvailable
		| Limit-ModulePath $installTempPath
		| Should -HaveCount 2
  }
  It '4 section version numbers with repeated zeroes' {
    $actual = Install-ModuleFast @imfParams 'xDSCResourceDesigner=1.13.0.0' -PassThru
    $resolvedPath = Resolve-Path $actual.Location.LocalPath
    Split-Path $resolvedPath -Leaf | Should -Be '1.13.0.0'
    Get-Module xDSCResourceDesigner -ListAvailable
		| Limit-ModulePath $installTempPath
		| Should -HaveCount 1
  }
  It '4 section version numbers with single trailing zero' {
    $actual = Install-ModuleFast @imfParams 'ConnectWiseManageApi=0.4.15.0' -PassThru
    # Path should exist in the new location
    $resolvedPath = $actual.Location.LocalPath
    Split-Path $resolvedPath -Leaf | Should -Be '0.4.15.0'
  }
  It 'lots of dependencies (Az)' {
    Install-ModuleFast @imfParams 'Az=11.1.0'
    (Get-Module Az* -ListAvailable).count | Should -BeGreaterThan 10
  }
  It 'specific requiredVersion' {
    Install-ModuleFast @imfParams @{ModuleName = 'Az.Accounts'; RequiredVersion = '2.7.4' }
    Get-Module Az.Accounts -ListAvailable
		| Limit-ModulePath $installTempPath
		| Select-Object -ExpandProperty Version
		| Should -Be '2.7.4'
  }
  It 'specific requiredVersion when newer version is present' {
    Install-ModuleFast @imfParams 'Az.Accounts'
    Install-ModuleFast @imfParams @{ModuleName = 'Az.Accounts'; RequiredVersion = '2.7.4' }
    $installedVersions = Get-Module Az.Accounts -ListAvailable
		| Limit-ModulePath $installTempPath
		| Select-Object -ExpandProperty Version

    $installedVersions | Should -HaveCount 2
    $installedVersions | Should -Contain '2.7.4'
  }
  It 'Installs when Maximumversion is lower than currently installed' {
    Install-ModuleFast @imfParams 'Az.Accounts'
    Install-ModuleFast @imfParams @{ModuleName = 'Az.Accounts'; MaximumVersion = '2.7.3' }
    Get-Module Az.Accounts -ListAvailable
		| Limit-ModulePath $installTempPath
		| Select-Object -ExpandProperty Version
		| Should -Contain '2.7.3'
  }
  It 'Only installs once when Update is specified and latest has not changed' {
    Install-ModuleFast @imfParams 'Az.Accounts' -Update
    $debugpreference = 'continue'
    Install-ModuleFast @imfParams 'Az.Accounts' -Update *>&1
    | Select-String 'best remote candidate matches what is locally installed'
    | Should -BeLike '*best remote candidate matches what is locally installed*'
    $debugpreference = 'silentlycontinue'
  }
  It 'Only installs once when Update is specified and latest has not changed for multiple modules' {
    Install-ModuleFast @imfParams 'Az.Compute', 'Az.CosmosDB' -Update
    Install-ModuleFast @imfParams 'Az.Compute', 'Az.CosmosDB' -Update -Plan
    | Should -BeNullOrEmpty
  }

  It 'Updates if multiple local versions installed' {
    Install-ModuleFast @imfParams 'Plaster=1.1.1'
    Install-ModuleFast @imfParams 'Plaster=1.1.3'
    $actual = Install-ModuleFast @imfParams 'Plaster' -Update -PassThru
    $actual.ModuleVersion | Should -BeGreaterThan '1.1.3'
  }

  It 'Updates only dependent module that requires update' {
    Install-ModuleFast @imfParams @{ModuleName = 'Az.Accounts'; RequiredVersion = '2.10.2' }
    Install-ModuleFast @imfParams	@{ModuleName = 'Az.Compute'; RequiredVersion = '5.0.0' }
    Get-Module Az.Accounts -ListAvailable
		| Limit-ModulePath $installTempPath
		| Select-Object -ExpandProperty Version
		| Sort-Object -Descending
		| Select-Object -First 1
		| Should -Be '2.10.2'

    Install-ModuleFast @imfParams 'Az.Compute', 'Az.Accounts' #Should not update
    Get-Module Az.Accounts -ListAvailable
		| Limit-ModulePath $installTempPath
		| Select-Object -ExpandProperty Version
		| Sort-Object -Descending
		| Select-Object -First 1
		| Should -Be '2.10.2'

    Install-ModuleFast @imfParams 'Az.Compute' -Update #Should disregard local install and update latest Az.Accounts
    Get-Module Az.Accounts -ListAvailable
		| Limit-ModulePath $installTempPath
		| Select-Object -ExpandProperty Version
		| Sort-Object -Descending
		| Select-Object -First 1
		| Should -BeGreaterThan ([version]'2.10.2')

    Get-Module Az.Compute -ListAvailable
		| Limit-ModulePath $installTempPath
		| Select-Object -ExpandProperty Version
		| Sort-Object -Descending
		| Select-Object -First 1
		| Should -BeGreaterThan ([version]'5.0.0')
  }

  It 'Detects module in other psmodulePath' {
    $installPath2 = Join-Path $testdrive $(New-Guid)
    New-Item -ItemType Directory $installPath2 | Out-Null
    $env:PSModulePath = "$installPath2"
    Install-ModuleFast @imfParams -Destination $installPath2 'PreReleaseTest'
    Install-ModuleFast @imfParams 'PreReleaseTest' -PassThru | Should -BeNullOrEmpty
  }

  It 'Only considers destination modules if -DestinationOnly is specified' {
    $installPath2 = Join-Path $testdrive $(New-Guid)
    New-Item -ItemType Directory $installPath2 | Out-Null
    $env:PSModulePath = "$installPath2"
    Install-ModuleFast @imfParams -Destination $installPath2 'PreReleaseTest'
    Install-ModuleFast @imfParams 'PreReleaseTest' -DestinationOnly -PassThru | Should -HaveCount 1
    Install-ModuleFast @imfParams 'PreReleaseTest' -DestinationOnly -PassThru | Should -BeNullOrEmpty
  }

  #TODO: Possibly mock this so we don't touch the testing system documents directory
  It 'Destination CurrentUser installs to $HOME\Documents\PowerShell\Modules' {
    if (-not $profile) {
      Set-ItResult -Skipped -Because 'This test is not supported when $profile is not set'
    }
    $winConfigPath = Join-Path (Split-Path ($profile.CurrentUserAllHosts)) 'powershell.config.json'
    if (-not $IsWindows -or (Test-Path $winConfigPath)) {
      Set-ItResult -Skipped -Because 'This test is not supported on non-Windows or when powershell.config.json is present'
    }

    try {
      Remove-Item $HOME\Documents\PowerShell\Modules\PrereleaseTest -Recurse -Force -ErrorAction SilentlyContinue
      Install-ModuleFast @imfParams 'PrereleaseTest' -Destination CurrentUser
      Resolve-Path $HOME\Documents\PowerShell\Modules\PrereleaseTest -EA Stop
    } finally {
      Remove-Item $HOME\Documents\PowerShell\Modules\PrereleaseTest -Recurse -Force -ErrorAction SilentlyContinue
    }
  }

  It '-DestinationOnly works on modules with dependencies' {
    Install-ModuleFast @imfParams 'Az.Compute' -DestinationOnly -PassThru | Should -HaveCount 2
  }

  It 'Errors trying to install prerelease over regular module' {
    Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1'
    { Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1-prerelease' }
    | Should -Throw '*is newer than the requested version*'
  }
  It 'Errors trying to install older prerelease over regular module' {
    Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1'
    { Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1-prerelease' }
    | Should -Throw '*is newer than the requested version*'
  }
  It 'Installs regular module over prerelease module with warning' {
    Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1-prerelease'
    Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1' -WarningVariable actual *>&1 | Out-Null
    $actual | Should -BeLike '*is newer than existing version*'
  }
  It 'Installs newer prerelease with warning' {
    Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1-aprerelease'
    Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1-bprerelease' -WarningVariable actual *>&1 | Out-Null
    $actual | Should -BeLike '*is newer than existing version*'
  }
  It 'Doesnt install prerelease if same-version Prerelease already installed' {
    Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1-prerelease'
    $plan = Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1-prerelease' -Plan
    $plan | Should -BeNullOrEmpty
  }

  It 'Installs from <Name> SpecFile' {
    $SCRIPT:Mocks = Resolve-Path "$PSScriptRoot/Test/Mocks"
    $specFilePath = Join-Path $Mocks $File
    $modulesToInstall = Install-ModuleFast @imfParams -Path $specFilePath -Plan
    #TODO: Verify individual modules and versions
    $modulesToInstall | Should -Not -BeNullOrEmpty
    if ($modules) {
      foreach ($module in $modules) {
        $module | Should -BeIn $modulesToInstall
        $modulesToInstall.Remove($module)
      }
      #All modules should be removed at this point
      $modulesToInstall | Should -BeNullOrEmpty
    }
  } -TestCases @(
    @{
      Name = 'PowerShell Data File'
      File = 'ModuleFast.requires.psd1'
    },
    @{
      Name = 'JSON'
      File = 'ModuleFast.requires.json'
    },
    @{
      Name = 'JSONArray'
      File = 'ModuleFastArray.requires.json'
    },
    @{
      Name = 'ScriptRequires'
      File = 'RequiresScript.ps1'
    },
    @{
      Name = 'ScriptModule'
      File = 'RequiresModule.psm1'
    },
    @{
      Name = 'DynamicManifest'
      File = 'Dynamic.psd1'
    },
    @{
      Name = 'ModuleBuilder'
      File = 'ModuleBuilder-RequiredModules.psd1'
    },
    @{
      Name = 'PSDepend-Implicit'
      File = 'PSDepend.psd1'
    }
  )

  It 'Fails if PSDepend File has PSDependOptions DependencyType set' {
    $SCRIPT:Mocks = Resolve-Path "$PSScriptRoot/Test/Mocks"
    $specFilePath = Join-Path $Mocks 'PSDepend-NotSupported.psd1'
    { Install-ModuleFast @imfParams -Path $specFilePath -Plan }
    | Should -Throw '*DependencyType*'
  }

  It 'Fails for script if #Requires is not Present' {
    $scriptPath = Join-Path $testDrive 'norequires.ps1'
    {
      'There is no requires here!'
    } | Out-File $scriptPath

    { Install-ModuleFast @imfParams -Path $scriptPath }
    | Should -Throw 'The script does not have a #Requires*'
  }
  It 'Fails for module if #Requires is not Present' {
    $scriptPath = Join-Path $testDrive 'norequires.psm1'
    {
      'There is no requires here!'
    } | Out-File $scriptPath

    { Install-ModuleFast @imfParams -Path $scriptPath }
    | Should -Throw 'The script does not have a #Requires*'
  }
  It 'Fails if Module Manifest and RequiredModules is missing' {
    $scriptPath = Join-Path $testDrive 'testmanifestnorequires.psd1'
    "@{
      'ModuleVersion'   = '1.0.0'
    }" | Out-File $scriptPath
    { Install-ModuleFast @imfParams -Path $scriptPath }
    | Should -Throw 'The manifest does not have a RequiredMOdules key*'
  }
  It 'Resolves Module Manifest RequiredModules' {
    $scriptPath = Join-Path $testDrive 'testmanifest.psd1'
    "@{
      'ModuleVersion'   = '1.0.0'
      'RequiredModules' = @(
        'PreReleaseTest'
        @{
          ModuleName = 'Az.Accounts'
          ModuleVersion = '2.7.0'
        }
      )
    }" | Out-File $scriptPath
    $modules = Install-ModuleFast @imfParams -Path $scriptPath -Plan
    $modules.count | Should -Be 2
  }
  It 'Resolves GUID with version range' {
    $scriptPath = Join-Path $testDrive 'testscript.ps1'
    "#requires -Module @{ModuleName='PreReleaseTest';Guid='7c279caf-00bc-40ae-a1ed-184ad07be1b0';ModuleVersion='0.0.1';MaximumVersion='0.0.2'}" | Out-File $scriptPath
    $actual = Install-ModuleFast @imfParams -WarningAction SilentlyContinue -Path $scriptPath -PassThru
    $actual.Name | Should -Be 'PrereleaseTest'
    $actual.ModuleVersion | Should -Be '0.0.1'
  }
  It 'Errors if GUID spec is different than installed module' {
    { Install-ModuleFast @imfParams -WarningAction SilentlyContinue -Specification "@{ModuleName='PreReleaseTest';Guid='3cb1a381-5d96-4b56-843e-dd97cf4c6545';ModuleVersion='0.0.1';MaximumVersion='0.0.2'}" -PassThru }
    | Should -Throw '*Expected 3cb1a381-5d96-4b56-843e-dd97cf4c6545 but found 7c279caf-00bc-40ae-a1ed-184ad07be1b0*'
  }

  It 'Writes a CI File' {
    Set-Location $testDrive
    Install-ModuleFast @imfParams -CI -Specification 'PreReleaseTest'
    Get-Item 'requires.lock.json' | Should -Not -BeNullOrEmpty
    #TODO: CI Content
  }

  It 'Installs from CI File and Installs CI Pinned Version' {
    Set-Location $testDrive
    Install-ModuleFast @imfParams -CI -Specification 'PreReleaseTest=0.0.1-prerelease'
    Get-Item 'requires.lock.json' | Should -Not -BeNullOrEmpty

    Remove-Item $imfParams.Destination -Recurse -Force
    New-Item -ItemType Directory -Path $imfParams.Destination -ErrorAction stop
    Install-ModuleFast @imfParams -CI
    $PreReleaseManifest = "$($imfParams.Destination)\PrereleaseTest\0.0.1\PrereleaseTest.psd1"
    Resolve-Path $PreReleaseManifest

    (Import-PowerShellDataFile $PreReleaseManifest).PrivateData.PSData.Prerelease
    | Should -Be 'prerelease' -Because 'CI lock file should have 0.1 prerelease even if 0.2 is available'
    #TODO: CI Content
  }

  It 'Handles an incomplete installation' {
    $incompleteItemPath = "$installTempPath\PrereleaseTest\0.0.1\.incomplete"
    Install-ModuleFast @imfParams -Specification 'PreReleaseTest=0.0.1'
    New-Item -ItemType File -Path $incompleteItemPath
    Install-ModuleFast @imfParams -Specification 'PreReleaseTest=0.0.1' -Update -WarningVariable actual 3>$null
    $actual | Should -BeLike '*incomplete installation detected*'
    Test-Path $incompleteItemPath | Should -BeFalse
  }
  It 'PassThru has proper matching output' {
    $actual = Install-ModuleFast @imfParams -Specification 'PrereleaseTest=0.0.1', 'ImportExcel=7.8.6', 'PendingReboot=0.9.0.6' -PassThru
    ($actual | Where-Object Name -EQ 'ImportExcel').ModuleVersion | Should -Be '7.8.6'
    ($actual | Where-Object Name -EQ 'PrereleaseTest').ModuleVersion | Should -Be '0.0.1'
    ($actual | Where-Object Name -EQ 'PendingReboot').ModuleVersion | Should -Be '0.9.0.6'
  }
  It 'PassThru only reports on installed modules' {
    Install-ModuleFast @imfParams -Specification 'Pester=5.4.0', 'Pester=5.4.1' -PassThru | Should -HaveCount 2
    Install-ModuleFast @imfParams -Specification 'Pester=5.4.0', 'Pester=5.4.1' -PassThru | Should -HaveCount 0
  }

  Describe 'GitHub Packages' {
    It 'Gets Specific Module' {
      if (-not (Get-Command Get-Secret -ea 0)) {
        Set-ItResult -Skipped -Because 'SecretManagement Not Present'
        return
      }
      $credential = [PSCredential]::new('Pester', (Get-Secret -Name 'ReadOnlyPackagesGithubPAT'))
      if (-not $credential) {
        Set-ItResult -Skipped -Because 'No ReadOnlyPackagesGithubPAT Credential'
        return
      }
      $actual = Install-ModuleFast @imfParams -Specification 'PrereleaseTest=0.0.1' -Source 'https://nuget.pkg.github.com/justingrote/index.json' -Credential $credential -Plan
      $actual.Name | Should -Be 'PrereleaseTest'
      $actual.ModuleVersion | Should -Be '0.0.1'
    }
  }

  Describe 'Plan Parameter' {
    It 'Does not install if Plan is specified' {
      Install-ModuleFast @imfParams -Specification 'PrereleaseTest' -Plan | Should -Match 'PreReleaseTest'
      Test-Path $installTempPath\PrereleaseTest | Should -BeFalse
    }
  }

  Describe 'LocalModuleFinder' {
    It 'Skips and deletes .incomplete folders' {
      # Install a module, then mark it incomplete and try to re-install
      Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1'
      $moduleDir = Get-ChildItem $installTempPath\PrereleaseTest -Directory | Select-Object -First 1
      New-Item -Path (Join-Path $moduleDir.FullName '.incomplete') -ItemType File | Out-Null

      # Should ignore the incomplete install and re-download
      $plan = Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1' -Plan
      $plan | Should -Not -BeNullOrEmpty
      # The incomplete folder should have been deleted
      Test-Path $moduleDir.FullName | Should -BeFalse
    }

    It 'Detects module with 3-part version folder' {
      Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1'
      # The folder should be 3-part (0.0.1) not 4-part
      $versionFolder = Get-ChildItem $installTempPath\PrereleaseTest -Directory | Select-Object -First 1
      $versionFolder.Name | Should -Be '0.0.1'
      # Second install should detect it and produce no plan
      $plan = Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1' -Plan
      $plan | Should -BeNullOrEmpty
    }

    It 'Handles missing manifest gracefully' {
      Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1'
      $moduleDir = Get-ChildItem $installTempPath\PrereleaseTest -Directory | Select-Object -First 1
      # Remove the manifest to simulate corruption
      Remove-Item (Join-Path $moduleDir.FullName '*.psd1')
      # Should produce a plan since the local module is unreadable
      $plan = Install-ModuleFast @imfParams 'PrereleaseTest=0.0.1' -Plan
      $plan | Should -Not -BeNullOrEmpty
    }
  }

  Describe 'Duplicate Specification Warning' {
    It 'Warns when same module is specified twice' {
      $actual = Install-ModuleFast @imfParams 'PrereleaseTest', 'PrereleaseTest' -Plan -WarningVariable warnings 3>$null
      $warnings | Should -BeLike '*specified twice*'
    }
  }

  Describe 'Prerelease Parameter' {
    It 'Installs prerelease when -Prerelease is specified globally' {
      $actual = Install-ModuleFast @imfParams 'PrereleaseTest' -Prerelease -PassThru
      $actual | Should -HaveCount 1
      $actual.ModuleVersion | Should -Be '0.0.2-prerelease'
    }
  }

  Describe 'StrictSemVer Parameter' {
    It 'StrictSemVer includes prereleases within exclusive upper bound' {
      $actual = Install-ModuleFast @imfParams 'PrereleaseTest!<0.0.2' -StrictSemVer -Plan
      $actual | Should -HaveCount 1
      $actual.ModuleVersion.IsPrerelease | Should -Be $true
    }
    It 'Without StrictSemVer excludes prereleases from exclusive upper bound' {
      $actual = Install-ModuleFast @imfParams 'PrereleaseTest!<0.0.2' -Plan
      $actual | Should -HaveCount 1
      $actual.ModuleVersion.IsPrerelease | Should -Be $false
    }
  }

  Describe 'ModuleFastInfo Pipeline' {
    It 'Installs modules from piped Install-ModuleFast -Plan output' {
      $plan = Install-ModuleFast 'PrereleaseTest=0.0.1' -Plan
      $actual = $plan | Install-ModuleFast @imfParams -PassThru
      $actual | Should -HaveCount 1
      $actual.Name | Should -Be 'PrereleaseTest'
      Get-Item $installTempPath\PrereleaseTest\*\PrereleaseTest.psd1 | Should -Not -BeNullOrEmpty
    }
  }

  Describe 'Auto-Detect Spec Files' {
    It 'Detects spec files in current directory when no args given' {
      $specDir = Join-Path $testDrive 'autodetect'
      New-Item -ItemType Directory $specDir | Out-Null
      "@{ 'PrereleaseTest' = 'latest' }" | Out-File (Join-Path $specDir 'ModuleFast.requires.psd1')
      Push-Location $specDir
      try {
        $actual = Install-ModuleFast @imfParams -Plan
        $actual | Should -Not -BeNullOrEmpty
        $actual.Name | Should -Contain 'PrereleaseTest'
      } finally {
        Pop-Location
      }
    }
  }

  Describe 'Directory Path' {
    It 'Installs from directory containing spec files' {
      $SCRIPT:Mocks = Resolve-Path "$PSScriptRoot/Test/Mocks"
      $actual = Install-ModuleFast @imfParams -Path $Mocks -Plan
      $actual | Should -Not -BeNullOrEmpty
    }
  }
}

Describe 'Clear-ModuleFastCache' {
  It 'Runs without error' {
    { Clear-ModuleFastCache } | Should -Not -Throw
  }
  It 'Clears cached entries so subsequent plans re-fetch' {
    # Prime the cache
    Install-ModuleFast 'PrereleaseTest=0.0.1' -Plan | Out-Null
    Clear-ModuleFastCache
    # Should still return a valid plan after cache flush
    $actual = Install-ModuleFast 'PrereleaseTest=0.0.1' -Plan
    $actual | Should -HaveCount 1
  }
}

Describe 'ModuleFastSpec' {
  Context 'Hashtable Constructor' {
    It 'Creates from hashtable' {
      $spec = [ModuleFastSpec]@{ ModuleName = 'Test'; ModuleVersion = '1.0.0' }
      $spec.Name | Should -Be 'Test'
      $spec.Min | Should -Be '1.0.0'
    }
    It 'Creates from hashtable with RequiredVersion' {
      $spec = [ModuleFastSpec]@{ ModuleName = 'Test'; RequiredVersion = '2.0.0' }
      $spec.Name | Should -Be 'Test'
      $spec.Required | Should -Be '2.0.0'
    }
    It 'Creates from hashtable with Guid' {
      $guid = [Guid]::NewGuid()
      $spec = [ModuleFastSpec]@{ ModuleName = 'Test'; Guid = $guid; ModuleVersion = '1.0.0' }
      $spec.Name | Should -Be 'Test'
      $spec.Guid | Should -Be $guid
    }
  }

  Context 'SatisfiedBy' {
    It 'Exact version satisfies required version spec' {
      $spec = [ModuleFastSpec]'Test=1.0.0'
      $spec.SatisfiedBy([NuGet.Versioning.NuGetVersion]::Parse('1.0.0')) | Should -Be $true
      $spec.SatisfiedBy([NuGet.Versioning.NuGetVersion]::Parse('2.0.0')) | Should -Be $false
    }
    It 'Higher version satisfies minimum version spec' {
      $spec = [ModuleFastSpec]'Test>=1.0.0'
      $spec.SatisfiedBy([NuGet.Versioning.NuGetVersion]::Parse('1.0.0')) | Should -Be $true
      $spec.SatisfiedBy([NuGet.Versioning.NuGetVersion]::Parse('2.0.0')) | Should -Be $true
      $spec.SatisfiedBy([NuGet.Versioning.NuGetVersion]::Parse('0.9.0')) | Should -Be $false
    }
    It 'Version range upper exclusive excludes prereleases by default' {
      $spec = [ModuleFastSpec]'Test:(,2.0.0)'
      $spec.SatisfiedBy([NuGet.Versioning.NuGetVersion]::Parse('2.0.0-alpha')) | Should -Be $false
    }
    It 'Version range upper exclusive includes prereleases with StrictSemVer' {
      $spec = [ModuleFastSpec]'Test:(,2.0.0)'
      $spec.SatisfiedBy([NuGet.Versioning.NuGetVersion]::Parse('2.0.0-alpha'), $true) | Should -Be $true
    }
    It 'System.Version overload works' {
      $spec = [ModuleFastSpec]'Test>=1.0.0'
      $spec.SatisfiedBy([Version]'2.0.0.0') | Should -Be $true
      $spec.SatisfiedBy([Version]'0.5.0.0') | Should -Be $false
    }
  }

  Context 'Overlap' {
    It 'Overlapping ranges return true' {
      $a = [ModuleFastSpec]'Test>=1.0.0'
      $b = [ModuleFastSpec]'Test<=2.0.0'
      $a.Overlap($b) | Should -Be $true
    }
    It 'Non-overlapping ranges return false' {
      $a = [ModuleFastSpec]'Test:(,1.0.0)'
      $b = [ModuleFastSpec]'Test>2.0.0'
      $a.Overlap($b) | Should -Be $false
    }
  }

  Context 'Equality and Comparison' {
    It 'Equal specs are equal' {
      $a = [ModuleFastSpec]'Test=1.0.0'
      $b = [ModuleFastSpec]'Test=1.0.0'
      $a.Equals($b) | Should -Be $true
      $a.GetHashCode() | Should -Be $b.GetHashCode()
    }
    It 'Different specs are not equal' {
      $a = [ModuleFastSpec]'Test=1.0.0'
      $b = [ModuleFastSpec]'Test=2.0.0'
      $a.Equals($b) | Should -Be $false
    }
    It 'Name-only spec is not equal to versioned spec' {
      $a = [ModuleFastSpec]'Test'
      $b = [ModuleFastSpec]'Test=1.0.0'
      $a.Equals($b) | Should -Be $false
    }
  }

  Context 'ToString' {
    It 'Name only' {
      ([ModuleFastSpec]'Test').ToString() | Should -Be 'Test'
    }
    It 'Required version' {
      ([ModuleFastSpec]'Test=1.0.0').ToString() | Should -Be 'Test(1.0.0)'
    }
    It 'With Guid' {
      $guid = '7c279caf-00bc-40ae-a1ed-184ad07be1b0'
      $spec = [ModuleFastSpec]::new(
        [ModuleSpecification]@{ ModuleName = 'Test'; Guid = $guid; ModuleVersion = '1.0.0' }
      )
      $spec.ToString() | Should -BeLike "*$guid*"
    }
  }

  Context 'PreRelease property' {
    It 'Returns false for stable version' {
      ([ModuleFastSpec]'Test=1.0.0').PreRelease | Should -Be $false
    }
    It 'Returns true for prerelease version' {
      ([ModuleFastSpec]'Test=1.0.0-beta').PreRelease | Should -Be $true
    }
    It 'Returns true for bang-prefixed name' {
      ([ModuleFastSpec]'!Test').PreRelease | Should -Be $true
    }
    It 'Returns true for bang-suffixed name' {
      ([ModuleFastSpec]'Test!').PreRelease | Should -Be $true
    }
  }

  Context 'Error Cases' {
    It 'Throws on empty name' {
      { [ModuleFastSpec]'' } | Should -Throw
    }
    It 'Throws on null name' {
      { [ModuleFastSpec]::new($null) } | Should -Throw
    }
    It 'Throws on invalid hashtable string' {
      { [ModuleFastSpec]'@{ModuleName="Test"; BadKey="Bad"}' } | Should -Throw '*not valid ModuleSpecification syntax*'
    }
  }
}

Describe 'ModuleFastInfo' {
  It 'Properties are set correctly' {
    $info = [ModuleFastInfo]::new('TestModule', '1.2.3', 'https://example.com/package')
    $info.Name | Should -Be 'TestModule'
    $info.ModuleVersion | Should -Be '1.2.3'
    $info.Location | Should -Be 'https://example.com/package'
    $info.IsLocal | Should -Be $false
  }
  It 'IsLocal is true for file URIs' {
    $tempFile = Join-Path $TestDrive 'test.nupkg'
    New-Item $tempFile -ItemType File -Force | Out-Null
    $info = [ModuleFastInfo]::new('TestModule', '1.0.0', "file:///$tempFile")
    $info.IsLocal | Should -Be $true
  }
  It 'PreRelease is true for prerelease version' {
    $info = [ModuleFastInfo]::new('TestModule', '1.0.0-beta', 'https://example.com/package')
    $info.PreRelease | Should -Be $true
  }
  It 'PreRelease is false for stable version' {
    $info = [ModuleFastInfo]::new('TestModule', '1.0.0', 'https://example.com/package')
    $info.PreRelease | Should -Be $false
  }
  It 'ToString formats correctly' {
    $info = [ModuleFastInfo]::new('TestModule', '1.2.3', 'https://example.com/package')
    $info.ToString() | Should -Be 'TestModule(1.2.3)'
  }
  It 'Casts to ModuleSpecification' {
    $info = [ModuleFastInfo]::new('TestModule', '1.2.3', 'https://example.com/package')
    $ms = [ModuleSpecification]$info
    $ms.Name | Should -Be 'TestModule'
    $ms.RequiredVersion | Should -Be '1.2.3.0'
  }
  It 'Equal instances have same hash code' {
    $a = [ModuleFastInfo]::new('Test', '1.0.0', 'https://example.com/a')
    $b = [ModuleFastInfo]::new('Test', '1.0.0', 'https://example.com/a')
    $a.Equals($b) | Should -Be $true
    $a.GetHashCode() | Should -Be $b.GetHashCode()
  }
  It 'Different instances are not equal' {
    $a = [ModuleFastInfo]::new('Test', '1.0.0', 'https://example.com/a')
    $b = [ModuleFastInfo]::new('Test', '2.0.0', 'https://example.com/b')
    $a.Equals($b) | Should -Be $false
  }
  It 'Formats as a table with name version and location' {
    $info = [ModuleFastInfo]::new('TestModule', '1.2.3', 'https://example.com/package')
    $rendered = $info | Format-Table | Out-String -Width 200

    $rendered | Should -Match 'Name\s+ModuleVersion\s+Location'
    $rendered | Should -Match 'TestModule\s+1\.2\.3\s+https://example\.com/package'
    $rendered | Should -Not -Match 'RequiredModules|Guid|IsLocal|PreRelease'
  }
}

Describe 'Install-ModuleFast -Plan' -Tag 'E2E' {
  BeforeAll {
    $SCRIPT:__existingPSModulePath2 = $env:PSModulePath
    $env:PSModulePath = $testDrive
  }
  AfterAll {
    $env:PSModulePath = $SCRIPT:__existingPSModulePath2
  }

  Context 'Destination Parameter' {
    It 'Uses -Destination to check for already installed modules' {
      $destDir = Join-Path $testDrive $(New-Guid)
      New-Item -ItemType Directory $destDir | Out-Null
      # First plan should include the module
      $plan1 = Install-ModuleFast 'PrereleaseTest=0.0.1' -Destination $destDir -NoPSModulePathUpdate -NoProfileUpdate -Plan
      $plan1 | Should -HaveCount 1
      # Install the module there
      Install-ModuleFast 'PrereleaseTest=0.0.1' -Destination $destDir -NoPSModulePathUpdate -NoProfileUpdate
      # Second plan should find it installed
      $plan2 = Install-ModuleFast 'PrereleaseTest=0.0.1' -Destination $destDir -NoPSModulePathUpdate -NoProfileUpdate -Plan
      $plan2 | Should -BeNullOrEmpty
    }
  }

  Context 'Update Parameter' {
    It 'Returns plan when -Update is specified even if locally satisfied' {
      $destDir = Join-Path $testDrive $(New-Guid)
      New-Item -ItemType Directory $destDir | Out-Null
      $env:PSModulePath = $destDir
      Install-ModuleFast 'PrereleaseTest=0.0.1' -Destination $destDir -NoPSModulePathUpdate -NoProfileUpdate
      # Without update, should be satisfied
      $plan = Install-ModuleFast 'PrereleaseTest' -Destination $destDir -NoPSModulePathUpdate -NoProfileUpdate -Plan
      $plan | Should -BeNullOrEmpty
      # With update, should check for newer
      $plan = Install-ModuleFast 'PrereleaseTest' -Destination $destDir -NoPSModulePathUpdate -NoProfileUpdate -Update -Plan
      $plan | Should -BeNullOrEmpty -Because 'PrereleaseTest 0.0.1 is already the latest stable version'
    }
  }
}