ci: sync from octopus@0.15.0

Reviewed-on: http://octopus.51zxtx.com:3000/fourbroad/octopus-release/pulls/1

tests/test.ps1

@@ -0,0 +1,75 @@
+#Requires -Version 5.1
+<#
+.SYNOPSIS
+    Regression tests for install.ps1.
+
+.BUG
+    `irm <url> | iex` closed the terminal window. Cause: the script used
+    `exit`, which under Invoke-Expression terminates the entire PowerShell
+    host process (there is no script scope to exit). Fix: use `return`
+    (success) / `throw` (errors) so the host survives.
+
+.NOTES
+    Host-process termination cannot be observed from inside the dying process,
+    so these tests combine a source-verification guard with a behavioral test
+    run in a child process (`exit` cannot be caught by try/catch and kills the
+    child; `throw` is catchable).
+#>
+[CmdletBinding()]
+param()
+
+Set-StrictMode -Version Latest
+$ErrorActionPreference = "Stop"
+
+$repoRoot      = Split-Path -Parent $PSScriptRoot
+$installScript = Join-Path $repoRoot "install.ps1"
+$failures      = [System.Collections.Generic.List[string]]::new()
+
+function Assert-True([bool]$Cond, [string]$Message) {
+    if (-not $Cond) { $failures.Add($Message) | Out-Null }
+}
+
+# --- Test 1 (source verification): no host-terminating `exit` ---
+$content   = Get-Content -Path $installScript -Raw
+$exitCount = ([regex]::Matches($content, '(?m)^\s*exit\b')).Count
+Assert-True ($exitCount -eq 0) "install.ps1 must not use bare 'exit' (found $exitCount); 'irm | iex' would kill the host. Use return/throw."
+
+# --- Test 2: parses cleanly ---
+$parseOk = $true
+try { [void][scriptblock]::Create($content) } catch { $parseOk = $false }
+Assert-True $parseOk "install.ps1 must parse without syntax errors."
+
+# --- Test 3 (behavioral): iex must NOT kill the host ---
+# Force the version lookup to fail fast against an unreachable address so the
+# script reaches its early-exit/throw path offline. `exit` terminates the child
+# (RESULT never emitted); `throw` is caught and RESULT is emitted.
+$inner = @'
+$ErrorActionPreference = "Stop"
+$env:OCTOPUS_DOWNLOAD_BASE = "http://127.0.0.1:1"
+$r = "nothing"
+try {
+    Invoke-Expression (Get-Content -Raw "__INSTALL__")
+    $r = "completed"
+} catch {
+    $r = "caught-throw"
+}
+Write-Output ("RESULT=$r")
+'@.Replace("__INSTALL__", $installScript)
+
+$tmp = Join-Path $env:TEMP ("octopus_iex_test_" + $PID + ".ps1")
+Set-Content -Path $tmp -Value $inner -Encoding UTF8
+try {
+    $childOut = (& powershell -NoProfile -File $tmp 2>&1 | Out-String)
+} finally {
+    Remove-Item $tmp -ErrorAction SilentlyContinue
+}
+Assert-True ($childOut -match 'RESULT=') "iex must not terminate the host (try/catch must observe a RESULT). Child output:`n$childOut"
+
+# --- Report ---
+if ($failures.Count -gt 0) {
+    Write-Host ("FAIL: " + $failures.Count + " test(s)") -ForegroundColor Red
+    foreach ($f in $failures) { Write-Host ("  - " + $f) -ForegroundColor Red }
+    exit 1
+}
+Write-Host "PASS: all regression tests passed." -ForegroundColor Green
+exit 0