PowerShell/test/powershell/Modules/Microsoft.PowerShell.Utility/Get-Unique.Tests.ps1

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# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
Describe "Get-Unique DRT Unit Tests" -Tags "CI" {
It "Command get-unique works with AsString switch" {
$inputArray = "aa","aa","Aa","ba","BA","BA"
$results = $inputArray | Get-Unique -AsString
$results.Length | Should -Be 4
$results[0] | Should -BeExactly "aa"
$results[1] | Should -BeExactly "Aa"
$results[2] | Should -BeExactly "ba"
$results[3] | Should -BeExactly "BA"
$results[0] | Should -BeOfType System.String
$results[1] | Should -BeOfType System.String
$results[2] | Should -BeOfType System.String
$results[3] | Should -BeOfType System.String
}
}
Describe "Get-Unique" -Tags "CI" {
BeforeAll {
$sortedList1 = 1,2,2,3,3,4,5
$expectedOutput1 = 1,2,3,4,5
$collection = "a", "b", "b", "d"
$expectedOutput2 = "a", "b", "d"
}
It "Should be able to use the Get-Unique cmdlet without error with inputObject switch" {
{ Get-Unique -InputObject $sortedList1 } | Should -Not -Throw
}
It "Should output an array" {
$result = Get-Unique -InputObject $sortedList1
$result | Should -Not -BeNullOrEmpty
,$result | Should -BeOfType System.Array
}
It "Should output an array of unchanged items when the InputObject switch is used" {
$actual = Get-Unique -InputObject $sortedList1
$(Compare-Object $actual $sortedList1 -SyncWindow 0).Length | Should -Be 0
}
It "Should accept piped input" {
{ $actualOutput = $sortedList1 | Get-Unique } | Should -Not -Throw
}
It "Should have the expected output when piped input is used" {
$actualOutput = $sortedList1 | Get-Unique
$(Compare-Object $actualOutput $expectedOutput1 -SyncWindow 0).Length | Should -Be 0
}
It "Should be able to input a collection in the inputObject switch" {
$actual = Get-Unique -InputObject $collection
$(Compare-Object $actual $collection -SyncWindow 0).Length | Should -Be 0
}
It "Should get the unique items when piped collection input is used" {
$actual = $collection | Get-Unique
$(Compare-Object $actual $expectedOutput2 -SyncWindow 0).Length | Should -Be 0
}
}