PowerShell/test/powershell/New-Variable.Tests.ps1

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PowerShell

Describe "New-Variable DRT Unit Tests" -Tags DRT{
It "New-Variable variable with description should works"{
New-Variable foo bar -description "my description"
$var1=Get-Variable -Name foo
$var1.Name|Should Be "foo"
$var1.Value|Should Be "bar"
$var1.Options|Should Be "None"
$var1.Description|Should Be "my description"
}
It "New-Variable variable with option should works"{
New-Variable foo bar -option Constant
$var1=Get-Variable -Name foo
$var1.Name|Should Be "foo"
$var1.Value|Should Be "bar"
$var1.Options|Should Be "Constant"
$var1.Description|Should Be ""
}
It "New-Variable variable twice should throw Exception"{
New-Variable foo bogus
try {
New-Variable foo bar -EA Stop
Throw "Execution OK"
}
catch {
$_.CategoryInfo| Should Match "SessionStateException"
$_.FullyQualifiedErrorId | Should Be "VariableAlreadyExists,Microsoft.PowerShell.Commands.NewVariableCommand"
}
New-Variable foo bar -Force -PassThru
$var1=Get-Variable -Name foo
$var1.Name|Should Be "foo"
$var1.Value|Should Be "bar"
$var1.Options|Should Be "None"
$var1.Description|Should Be ""
}
It "New-Variable ReadOnly variable twice should throw Exception"{
New-Variable foo bogus -option ReadOnly
try {
New-Variable foo bar -EA Stop
Throw "Execution OK"
}
catch {
$_.CategoryInfo| Should Match "SessionStateException"
$_.FullyQualifiedErrorId | Should Be "VariableAlreadyExists,Microsoft.PowerShell.Commands.NewVariableCommand"
}
New-Variable foo bar -Force -PassThru
$var1=Get-Variable -Name foo
$var1.Name|Should Be "foo"
$var1.Value|Should Be "bar"
$var1.Options|Should Be "None"
$var1.Description|Should Be ""
}
}
Describe "New-Variable" {
It "Should create a new variable with no parameters" {
{ New-Variable var1 } | Should Not Throw
}
It "Should be able to set variable name using the Name parameter" {
{ New-Variable -Name var1 } | Should Not Throw
}
It "Should be able to assign a value to a variable using the value switch" {
New-Variable var1 -Value 4
$var1 | Should Be 4
}
It "Should be able to assign a value to a new variable without using the value switch" {
New-Variable var1 "test"
$var1 | Should Be "test"
}
It "Should assign a description to a new variable using the description switch" {
New-Variable var1 100 -Description "Test Description"
(Get-Variable var1).Description | Should Be "Test Description"
}
It "Should be able to be called with the nv alias" {
nv var1
$var1 | Should BeNullOrEmpty
nv var2 2
$var2 | Should Be 2
}
It "Should not be able to set the name of a new variable to that of an old variable within same scope when the Force switch is missing" {
New-Variable var1
(New-Variable var1 -ErrorAction SilentlyContinue) | Should Throw
}
It "Should change the value of an already existing variable using the Force switch" {
New-Variable var1 -Value 1
$var1 | Should Be 1
New-Variable var1 -Value 2 -Force
$var1 | Should Be 2
$var1 | Should Not Be 1
}
It "Should be able to set the value of a variable by piped input" {
$in = "value"
$in | New-Variable -Name var1
$var1 | Should Be $in
}
It "Should be able to pipe object properties to output using the PassThru switch" {
$in = Set-Variable -Name testVar -Value "test" -Description "test description" -PassThru
$in.Description | Should Be "test description"
}
It "Should be able to set the value using the value switch" {
New-Variable -Name var1 -Value 2
$var1 | Should Be 2
}
Context "Option tests" {
It "Should be able to use the options switch without error" {
{ New-Variable -Name var1 -Value 2 -Option Unspecified } | Should Not Throw
}
It "Should default to none as the value for options" {
(new-variable -name var2 -value 4 -passthru).Options | should be "None"
}
It "Should be able to set ReadOnly option" {
{ New-Variable -Name var1 -Value 2 -Option ReadOnly } | Should Not Throw
}
It "Should not be able to change variable created using the ReadOnly option when the Force switch is not used" {
New-Variable -Name var1 -Value 1 -Option ReadOnly
Set-Variable -Name var1 -Value 2 -ErrorAction SilentlyContinue
$var1 | Should Not Be 2
}
It "Should be able to set a new variable to constant" {
{ New-Variable -Name var1 -Option Constant } | Should Not Throw
}
It "Should not be able to change an existing variable to constant" {
New-Variable -Name var1 -Value 1 -PassThru
Set-Variable -Name var1 -Option Constant -ErrorAction SilentlyContinue
(Get-Variable var1).Options | should be "None"
}
It "Should not be able to delete a constant variable" {
New-Variable -Name var1 -Value 2 -Option Constant
Remove-Variable -Name var1 -ErrorAction SilentlyContinue
$var1 | Should Be 2
}
It "Should not be able to change a constant variable" {
New-Variable -Name var1 -Value 1 -Option Constant
Set-Variable -Name var1 -Value 2 -ErrorAction SilentlyContinue
$var1 | Should Not Be 2
}
It "Should be able to create a variable as private without error" {
{ New-Variable -Name var1 -Option Private } | Should Not Throw
}
It "Should be able to see the value of a private variable when within scope" {
New-Variable -Name var1 -Value 100 -Option Private
$var1 | Should Be 100
}
It "Should not be able to see the value of a private variable when out of scope" {
{New-Variable -Name var1 -Value 1 -Option Private}| Should Not Throw
$var1 | Should BeNullOrEmpty
}
It "Should be able to use the AllScope switch without error" {
{ New-Variable -Name var1 -Option AllScope } | Should Not Throw
}
It "Should be able to see variable created using the AllScope switch in a child scope" {
New-Variable -Name var1 -Value 1 -Option AllScope
&{ $var1 = 2 }
$var1 | Should Be 2
}
}
Context "Scope Tests" {
BeforeAll {
if ( get-variable -scope global -name globalVar1 -ea SilentlyContinue )
{
Remove-Variable -scope global -name globalVar1
}
if ( get-variable -scope script -name scriptvar -ea SilentlyContinue )
{
remove-variable -scope script -name scriptvar
}
# no check for local scope variable as that scope is created with test invocation
}
AfterAll {
if ( get-variable -scope global -name globalVar1 )
{
Remove-Variable -scope global -name globalVar1
}
if ( get-variable -scope script -name scriptvar )
{
remove-variable -scope script -name scriptvar
}
}
It "Should be able to create a global scope variable using the global switch" {
new-variable -Scope global -name globalvar1 -value 1
get-variable -Scope global -name globalVar1 -ValueOnly | Should be 1
}
It "Should be able to create a local scope variable using the local switch" {
Get-Variable -scope local -name localvar -ValueOnly -ea silentlycontinue | should BeNullOrEmpty
New-Variable -Scope local -Name localVar -value 10
get-variable -scope local -name localvar -ValueOnly | Should be 10
}
It "Should be able to create a script scope variable using the script switch" {
new-variable -scope script -name scriptvar -value 100
get-variable -scope script -name scriptvar -ValueOnly | should be 100
}
}
}