File size: 5,692 Bytes
8c763fb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 | # Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.
Describe "Using of ternary operator" -Tags CI {
BeforeAll {
$testCases = @(
## Condition: variable and constant expressions
@{ Script = { $true ? 1 : 2 }; ExpectedValue = 1 }
@{ Script = { $true? ?1 :2 }; ExpectedValue = 2 }
@{ Script = { ${true}?1:2 }; ExpectedValue = 1 }
@{ Script = { 1 ? 1kb : 0xf }; ExpectedValue = 1kb }
@{ Script = { 0 ?1kb:0xf }; ExpectedValue = 15 }
@{ Script = { 's' ?1kb:0xf }; ExpectedValue = 1kb }
@{ Script = { $null ?1kb:0xf }; ExpectedValue = 15 }
@{ Script = { '' ?1kb:0xf }; ExpectedValue = 15 }
## Condition: other primary expressions
@{ Script = { 1,2,3,4 ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { @(1,2,3,4) ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { @{name = 'name'} ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { @{name = 'name'}.name ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { @{name = 'name'}.Contains('name') ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { (Test-Path Env:\NonExist) ? 'true' : 'false' }; ExpectedValue = 'false' }
@{ Script = { (Test-Path Env:\PSModulePath) ? 'true' : 'false' }; ExpectedValue = 'true' }
@{ Script = { $($p = Get-Process -Id $PID; $p.Id -eq $PID) ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { ($a = 1) ? 2 : 3 }; ExpectedValue = 2 }
@{ Script = { $($a = 1) ? 2 : 3 }; ExpectedValue = 3 }
@{ Script = { (Write-Warning -Message warning -WarningAction SilentlyContinue) ? 1 : 2 }; ExpectedValue = 2 }
@{ Script = { (Write-Error -Message error -ErrorAction SilentlyContinue) ? 1 : 2 }; ExpectedValue = 2 }
## Condition: unary and binary expression expressions
@{ Script = { -not $IsCoreCLR ? 'Desktop' : 'Core' }; ExpectedValue = 'Core' }
@{ Script = { $PSEdition -eq 'Core' ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { $IsCoreCLR -and (Get-Process -Id $PID).Id -eq $PID ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { $IsCoreCLR -and 'pwsh' -match 'p.*h' ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
@{ Script = { 1,2,3 -contains 2 ? 'Core' : 'Desktop' }; ExpectedValue = 'Core' }
## Nested ternary expressions
@{ Script = { $IsCoreCLR ? $false ? 'nested-if-true' : 'nested-if-false' : 'if-false' }; ExpectedValue = 'nested-if-false' }
@{ Script = { $IsCoreCLR ? $false ? 'nested-if-true' : $true ? 'nested-nested-if-true' : 'nested-nested-if-false' : 'if-false' }; ExpectedValue = 'nested-nested-if-true' }
## Binary operator has higher precedence order than ternary
@{ Script = { !$IsCoreCLR ? 'Core' : 'Desktop' -EQ 'Core' }; ExpectedValue = !$IsCoreCLR ? 'Core' : ('Desktop' -eq 'Core') }
@{ Script = { ($IsCoreCLR ? 'Core' : 'Desktop') -eq 'Core' }; ExpectedValue = $true }
)
}
AfterAll {
if ($skipTest) {
$global:PSDefaultParameterValues = $originalDefaultParameterValues
}
}
It "Ternary expression '<Script>' should generate correct results" -TestCases $testCases {
param($Script, $ExpectedValue)
& $Script | Should -BeExactly $ExpectedValue
}
It "Ternary expression which generates a terminating error should halt appropriately" {
{ (Write-Error -Message error -ErrorAction Stop) ? 1 : 2 } | Should -Throw -ErrorId Microsoft.PowerShell.Commands.WriteErrorException
}
It "Use ternary operator in parameter default values" {
function testFunc {
param($psExec = $IsCoreCLR ? 'pwsh' : 'powershell.exe')
$psExec
}
testFunc | Should -BeExactly 'pwsh'
}
It "Use ternary operator with assignments" {
$IsCoreCLR ? ([string]$var = 'string') : 'blah' > $null
$var = [System.IO.FileInfo]::new('abc')
$var | Should -BeOfType string
$var | Should -BeExactly 'abc'
}
It "Use ternary operator in pipeline" {
$result = $IsCoreCLR ? 'Core' : 'Desktop' | ForEach-Object { $_ + '-Pipe' }
$result | Should -BeExactly 'Core-Pipe'
}
It "Return script block from ternary expression" {
$result = ${IsCoreCLR}?{'Core'}:{'Desktop'}
$result | Should -BeOfType scriptblock
& $result | Should -BeExactly 'Core'
}
It "Tab completion for variables assigned with ternary expression should work as expected" {
## Type inference for the ternary expression should aggregate the inferred values from both branches
$text1 = '$var1 = $IsCoreCLR ? (Get-Item $PSHOME) : (Get-Process -Id $PID); $var1.Full'
$result = TabExpansion2 -inputScript $text1 -cursorColumn $text1.Length
$result.CompletionMatches[0].CompletionText | Should -BeExactly FullName
$text2 = '$var1 = $IsCoreCLR ? (Get-Item $PSHOME) : (Get-Process -Id $PID); $var1.Proce'
$result = TabExpansion2 -inputScript $text2 -cursorColumn $text2.Length
$result.CompletionMatches[0].CompletionText | Should -BeExactly ProcessName
$text3 = '$IsCoreCLR ? ($var2 = Get-Item $PSHOME) : "blah"; $var2.Full'
$result = TabExpansion2 -inputScript $text3 -cursorColumn $text3.Length
$result.CompletionMatches[0].CompletionText | Should -BeExactly FullName
}
}
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