Fix broken studio e2e tests

components/studio/bin/hab-studio.ps1

@@ -507,9 +507,12 @@ function Update-SslCertFile {
       $studio_ssl_cert_file = (Join-Path $env:HAB_CACHE_SSL_PATH $cert_filename)
       if (Test-Path $studio_ssl_cert_file) {
         $env:SSL_CERT_FILE = $studio_ssl_cert_file
+      } else {
+        $env:SSL_CERT_FILE = $null
       }
     } catch {
       Write-HabInfo "Unable to set SSL_CERT_FILE from '$env:SSL_CERT_FILE'"
+      $env:SSL_CERT_FILE = $null
     }
   }
 }

test/end-to-end/test_studio_with_ssl_cert_file_envvar_set.ps1

@@ -18,10 +18,12 @@ if($IsLinux) {
     $sslCertFileCheck = "test -f `$SSL_CERT_FILE"
     $sslCertFilePrint = "echo `$SSL_CERT_FILE"
     $sslCacheCertFileCheck = "test -f '/hab/cache/ssl/$e2e_certname'"
+    $sslCertFileNotSetCheck = "test ! -v SSL_CERT_FILE"
 } else {
     $sslCertFileCheck = "exit (!(Test-Path `$env:SSL_CERT_FILE))"
     $sslCertFilePrint = "`$env:SSL_CERT_FILE.Replace('\','/')"
     $sslCacheCertFileCheck = "exit (!(Test-Path '/hab/cache/ssl/$e2e_certname'))"
+    $sslCertFIleNotSetCheck = "exit `$(!!(`$env:SSL_CERT_FILE))"
 }
 
 Context "SSL_CERT_FILE is passed into the studio" {
@@ -88,9 +90,19 @@ Context "SSL_CERT_FILE is passed into the studio" {
     Describe "SSL_CERT_FILE is a directory" {
         $env:SSL_CERT_FILE = (Join-Path $tempdir "cert-as-directory")
         New-Item -ItemType Directory -Force -Path $env:SSL_CERT_FILE
+
+        It "Should not set SSL_CERT_FILE" {
+            Invoke-StudioRun $sslCertFileNotSetCheck
+            $LASTEXITCODE | Should -Be 0
+        }
 
         It "Should not copy the directory into the studio" {
-            Invoke-StudioRun $sslCertFileCheck
+            if($isLinux) {
+              Invoke-StudioRun "test -e /hab/cache/ssl/cert-as-directory"
+            } else { 
+              Invoke-StudioRun $sslCertFileCheck
+            }
+
             $LASTEXITCODE | Should -Be 1
         }
 
@@ -107,10 +119,19 @@ Context "SSL_CERT_FILE is passed into the studio" {
         }
 
         It "Should not copy the file into the studio" {
-            Invoke-StudioRun $sslCertFileCheck
+            if($isLinux) {
+              Invoke-StudioRun "test -e /hab/cache/ssl/non-existant-file"
+            } else { 
+              Invoke-StudioRun $sslCertFileCheck
+            }
             $LASTEXITCODE | Should -Be 1
         }
 
+        It "Should not set SSL_CERT_FILE" {
+            Invoke-StudioRun $sslCertFileNotSetCheck
+            $LASTEXITCODE | Should -Be 0
+        }
+
         It "Can still search packages on builder" {
             $result = Invoke-StudioRun "hab pkg search core/nginx"
             $result | Should -Contain "core/nginx"
@@ -130,10 +151,9 @@ Context "SSL_CERT_FILE isn't set" {
     }
 
     Describe "Studio is auto-installed on first run" {
-
         It "Should not set SSL_CERT_FILE in the studio" {
-            $result = hab studio run '$env:SSL_CERT_FILE -eq $null'
-            $result[-1]| Should -be "True"
+            Invoke-StudioRun $sslCertFileNotSetCheck
+            $LASTEXITCODE | Should -Be 0
         }
     }
 }