fix: restore automatic startup of local ADB server

tests/unit/test_adb_startup_scripts.py

@@ -0,0 +1,75 @@
+"""Run just the ADB startup functions with fake commands; never touch host ADB."""
+
+import os
+from pathlib import Path
+import shutil
+import subprocess
+
+import pytest
+
+ROOT = Path(__file__).resolve().parents[2]
+
+
+@pytest.mark.skipif(not shutil.which("powershell.exe"), reason="Windows PowerShell required")
+@pytest.mark.parametrize("script_name", ["start.ps1", "install_deps.ps1"])
+@pytest.mark.parametrize("outcome", ["success", "failure", "exception"])
+def test_adb_startup_reports_failure_and_preserves_server_environment(
+    tmp_path, script_name, outcome
+):
+    harness = tmp_path / "adb-startup.ps1"
+    harness.write_text(
+        """
+$ErrorActionPreference = 'Stop'
+[Console]::OutputEncoding = New-Object System.Text.UTF8Encoding($false)
+$tokens = $null
+$parseErrors = $null
+$ast = [System.Management.Automation.Language.Parser]::ParseFile(
+    $env:ADB_TEST_SCRIPT, [ref]$tokens, [ref]$parseErrors)
+if ($parseErrors.Count) { throw ($parseErrors | Out-String) }
+$function = $ast.Find({ param($node)
+    $node -is [System.Management.Automation.Language.FunctionDefinitionAst] -and
+    $node.Name -eq 'Start-LocalAdbServer'
+}, $true)
+Invoke-Expression $function.Extent.Text
+function Test-CommandExists { return $true }
+function adb {
+    Write-Host ('ADB_ARGS=' + ($args -join '|'))
+    if ($env:ADB_TEST_OUTCOME -eq 'exception') { throw 'fixture launch error' }
+    Write-Error 'fixture stderr' -ErrorAction Continue
+    $global:LASTEXITCODE = $(if ($env:ADB_TEST_OUTCOME -eq 'failure') { 7 } else { 0 })
+}
+Start-LocalAdbServer
+if ($env:ADB_SERVER_SOCKET -ne 'tcp:remote.example:5040') { throw 'Socket was changed' }
+if ($env:ANDROID_ADB_SERVER_ADDRESS -ne 'remote.example') { throw 'Host was changed' }
+if ($env:ANDROID_ADB_SERVER_PORT -ne '5040') { throw 'Port was changed' }
+if ($ErrorActionPreference -ne 'Stop') { throw 'Error preference was changed' }
+Write-Host 'HARNESS_OK'
+""",
+        encoding="utf-8-sig",
+    )
+    result = subprocess.run(
+        ["powershell.exe", "-NoProfile", "-ExecutionPolicy", "Bypass", "-File", str(harness)],
+        env={
+            **os.environ,
+            "ADB_TEST_SCRIPT": str(ROOT / "scripts" / script_name),
+            "ADB_TEST_OUTCOME": outcome,
+            "ADB_SERVER_SOCKET": "tcp:remote.example:5040",
+            "ANDROID_ADB_SERVER_ADDRESS": "remote.example",
+            "ANDROID_ADB_SERVER_PORT": "5040",
+        },
+        capture_output=True,
+        encoding="utf-8",
+        errors="replace",
+        timeout=15,
+    )
+    assert result.returncode == 0, result.stdout + result.stderr
+    assert "ADB_ARGS=-H|localhost|-P|5037|start-server" in result.stdout
+    assert "HARNESS_OK" in result.stdout
+    if outcome == "success":
+        assert "[警告]" not in result.stdout
+    elif outcome == "failure":
+        assert "退出码 7" in result.stdout
+        assert "fixture stderr" in result.stdout
+    else:
+        assert "启动异常" in result.stdout
+        assert "fixture launch error" in result.stdout