Change native execution tests to use df instead of stty (PowerShell#3685)

JamesWTruher · mirichmo · commit 563806c15d7b · 2017-05-02T18:45:35.000-07:00
when automating test execution, some environments don't have a tty which causes
the tests to fail. df is just as good a test as stty as it is also guaranteed to be
present. This change also allows the tests to be run on OSX
diff --git a/test/powershell/Language/Scripting/NativeExecution/NativeLinuxCommands.Tests.ps1 b/test/powershell/Language/Scripting/NativeExecution/NativeLinuxCommands.Tests.ps1
@@ -1,9 +1,6 @@
 if ( $IsWindows ) {
     $PesterSkipOrPending = @{ Skip = $true }
 }
-elseif ( $IsOSX ) {
-    $PesterSkipOrPending = @{ Pending = $true }
-}
 else {
     $PesterSkipOrPending = @{}
 }
@@ -27,15 +24,15 @@ Describe "NativeLinuxCommands" -tags "CI" {
     }
 
     It "Should not redirect standard input if native command is the first command in pipeline (1)" @PesterSkipOrPending {
-        stty | ForEach-Object -Begin { $out = @() } -Process { $out += $_ }
+        df | ForEach-Object -Begin { $out = @() } -Process { $out += $_ }
         $out.Length -gt 0 | Should Be $true
-        $out[0] -like "speed * baud; line =*" | Should Be $true
+        $out[0] -like "Filesystem*Available*" | Should Be $true
     }
 
     It "Should not redirect standard input if native command is the first command in pipeline (2)" @PesterSkipOrPending {
-        $out = stty
+        $out = df
         $out.Length -gt 0 | Should Be $true
-        $out[0] -like "speed * baud; line =*" | Should Be $true
+        $out[0] -like "Filesystem*Available*" | Should Be $true
     }
 }
 

Original file line number	Diff line number	Diff line change
`@@ -1,9 +1,6 @@`
`1`	`1`	`if ( $IsWindows ) {`
`2`	`2`	`$PesterSkipOrPending = @{ Skip = $true }`
`3`	`3`	`}`
`4`		`-elseif ( $IsOSX ) {`
`5`		`- $PesterSkipOrPending = @{ Pending = $true }`
`6`		`-}`
`7`	`4`	`else {`
`8`	`5`	`$PesterSkipOrPending = @{}`
`9`	`6`	`}`
`@@ -27,15 +24,15 @@ Describe "NativeLinuxCommands" -tags "CI" {`
`27`	`24`	`}`
`28`	`25`
`29`	`26`	`It "Should not redirect standard input if native command is the first command in pipeline (1)" @PesterSkipOrPending {`
`30`		`- stty \| ForEach-Object -Begin { $out = @() } -Process { $out += $_ }`
	`27`	`+ df \| ForEach-Object -Begin { $out = @() } -Process { $out += $_ }`
`31`	`28`	`$out.Length -gt 0 \| Should Be $true`
`32`		`- $out[0] -like "speed * baud; line =*" \| Should Be $true`
	`29`	`+ $out[0] -like "FilesystemAvailable" \| Should Be $true`
`33`	`30`	`}`
`34`	`31`
`35`	`32`	`It "Should not redirect standard input if native command is the first command in pipeline (2)" @PesterSkipOrPending {`
`36`		`- $out = stty`
	`33`	`+ $out = df`
`37`	`34`	`$out.Length -gt 0 \| Should Be $true`
`38`		`- $out[0] -like "speed * baud; line =*" \| Should Be $true`
	`35`	`+ $out[0] -like "FilesystemAvailable" \| Should Be $true`
`39`	`36`	`}`
`40`	`37`	`}`
`41`	`38`