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Version: v6

InModuleScope

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Contributions are welcome in Pester-repo.

SYNOPSIS​

Allows you to execute parts of a test script within the scope of a PowerShell script or manifest module.

SYNTAX​

InModuleScope [-ModuleName] <string> [-ScriptBlock] <scriptblock> [[-Parameters] <hashtable>]
 [[-ArgumentList] <Object[]>]

DESCRIPTION​

By injecting some test code into the scope of a PowerShell script or manifest module, you can use non-exported functions, aliases and variables inside that module, to perform unit tests on its internal implementation.

InModuleScope may be used anywhere inside a Pester script, either inside or outside a Describe block.

EXAMPLES​

EXAMPLE 1​

# The script module:
function PublicFunction {
    # Does something
}

function PrivateFunction {
    return $true
}

Export-ModuleMember -Function PublicFunction

# The test script:

BeforeAll {
    Import-Module MyModule
}

Describe 'Testing MyModule' {
    It 'Tests the Private function' {
        InModuleScope MyModule {
            PrivateFunction | Should -Be $true
        }
    }
}

Normally you would not be able to access "PrivateFunction" from the PowerShell session, because the module only exported "PublicFunction". Using InModuleScope allowed this call to "PrivateFunction" to work successfully.

EXAMPLE 2​

# The script module:
function PublicFunction {
    # Does something
}

function PrivateFunction ($MyParam) {
    return $MyParam
}

Export-ModuleMember -Function PublicFunction

# The test script:

Describe 'Testing MyModule' {
    BeforeAll {
        Import-Module MyModule
    }

    It 'passing in parameter' {
        $SomeVar = 123
        InModuleScope 'MyModule' -Parameters @{ MyVar = $SomeVar } {
            $MyVar | Should -Be 123
        }
    }

    It 'accessing whole testcase in module scope' -TestCases @(
        @{ Name = 'Foo'; Bool = $true }
    ) {
        # Passes the whole testcase-dictionary available in $_ to InModuleScope
        InModuleScope 'MyModule' -Parameters $_ {
            $Name | Should -Be 'Foo'
            PrivateFunction -MyParam $Bool | Should -BeTrue
        }
    }
}

This example shows two ways of using -Parameters to pass variables created in a testfile into the module scope where the scriptblock provided to InModuleScope is executed. No variables from the outside are available inside the scriptblock without explicitly passing them in using -Parameters or -ArgumentList.

PARAMETERS​

-ArgumentList​

A optional list of arguments to be passed to the scriptblock.

Type: System.Object[]
DefaultValue: '@()'
SupportsWildcards: false
Aliases: []
ParameterSets:
- Name: (All)
  Position: 3
  IsRequired: false
  ValueFromPipeline: false
  ValueFromPipelineByPropertyName: false
  ValueFromRemainingArguments: false
DontShow: false
AcceptedValues: []
HelpMessage: ''

-ModuleName​

The name of the module into which the test code should be injected. This module must already be loaded into the current PowerShell session.

Type: System.String
DefaultValue: ''
SupportsWildcards: false
Aliases: []
ParameterSets:
- Name: (All)
  Position: 0
  IsRequired: true
  ValueFromPipeline: false
  ValueFromPipelineByPropertyName: false
  ValueFromRemainingArguments: false
DontShow: false
AcceptedValues: []
HelpMessage: ''

-Parameters​

A optional hashtable of parameters to be passed to the scriptblock. Parameters are automatically made available as variables in the scriptblock.

Type: System.Collections.Hashtable
DefaultValue: '@{}'
SupportsWildcards: false
Aliases: []
ParameterSets:
- Name: (All)
  Position: 2
  IsRequired: false
  ValueFromPipeline: false
  ValueFromPipelineByPropertyName: false
  ValueFromRemainingArguments: false
DontShow: false
AcceptedValues: []
HelpMessage: ''

-ScriptBlock​

The code to be executed within the script or manifest module.

Type: System.Management.Automation.ScriptBlock
DefaultValue: ''
SupportsWildcards: false
Aliases: []
ParameterSets:
- Name: (All)
  Position: 1
  IsRequired: true
  ValueFromPipeline: false
  ValueFromPipelineByPropertyName: false
  ValueFromRemainingArguments: false
DontShow: false
AcceptedValues: []
HelpMessage: ''

CommonParameters​

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutBuffer, -OutVariable, -PipelineVariable, -ProgressAction, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters.

INPUTS​

OUTPUTS​

NOTES​

VERSION​

This page was generated using comment-based help in Pester 6.0.0.