PowerShell/test/powershell/Modules/Microsoft.PowerShell.Utility/Out-String.Tests.ps1

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PowerShell

# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
Describe "Out-String DRT Unit Tests" -Tags "CI" {
It "check display of properties with names containing wildcard characters" {
$results = New-Object psobject | Add-Member -PassThru noteproperty 'name with square brackets: [0]' 'myvalue' | Out-String
$results.Length | Should -BeGreaterThan 1
$results | Should -BeOfType System.String
$results.Contains("myvalue") | Should -BeTrue
$results.Contains("name with square brackets: [0]") | Should -BeTrue
}
}
Describe "Out-String" -Tags "CI" {
BeforeAll {
$nl = [Environment]::NewLine
}
It "Should accumulate the strings and returns them as a single string" {
$testArray = "a", " b"
$testArray | Out-String | Should -BeExactly "a$nl b$nl"
,$($testArray | Out-String) | Should -BeOfType System.String
}
It "Should be able to return an array of strings using the stream switch" {
$testInput = "a", "b"
,$($testInput | Out-String) | Should -BeOfType System.String
,$($testInput | Out-String -Stream) | Should -BeOfType System.Array
}
It "Should send all objects through a pipeline when not using the stream switch" {
$testInput = "a", "b"
$streamoutputlength = $($testInput | Out-String -Stream).Length
$nonstreamoutputlength = $($testInput | Out-String).Length
$nonstreamoutputlength | Should -BeGreaterThan $streamoutputlength
}
It "Should send a single object through a pipeline when the stream switch is used" {
$testInput = "a", "b"
$streamoutputlength = $($testInput | Out-String -Stream).Length
$nonstreamoutputlength = $($testInput | Out-String).Length
$streamoutputlength | Should -BeLessThan $nonstreamoutputlength
}
It "Should not print a newline when the nonewline switch is used" {
$testArray = "a", "b"
$testArray | Out-String -NoNewLine | Should -BeExactly "ab"
}
It "Should preserve embedded newline when the nonewline switch is used" {
$testArray = "a$nl", "b"
$testArray | Out-String -NoNewLine | Should -BeExactly "a${nl}b"
}
It "Should throw error when NoNewLine and Stream are used together" {
$testArray = "a", "b"
{ $testArray | Out-String -NoNewLine -Stream } | Should -Throw -ErrorId "AmbiguousParameterSet,Microsoft.PowerShell.Commands.OutStringCommand"
}
}