test: update IP pool test to use Windows VMX and clarify test purpose

tests/python/test_commands_job.py

@@ -580,13 +580,22 @@ def test_inject_guestinfo_ip_omits_empty_gateway(tmp_path: Path) -> None:
 
 
 def test_job_with_ip_pool_uses_preassigned_ip(
-    monkeypatch: pytest.MonkeyPatch, tmp_path: Path, template_vmx: Path
+    monkeypatch: pytest.MonkeyPatch, tmp_path: Path
 ) -> None:
-    """When ip_pool is configured the job skips _wait_for_ip and uses the pool IP."""
+    """When ip_pool is configured the job skips _wait_for_ip and uses the pool IP.
+
+    IP pool is Windows-only (guestinfo injection has no effect on Linux VMware
+    Tools), so this test uses a Windows VMX.
+    """
     from ci_orchestrator.config import Config, IpPoolConfig
     from ci_orchestrator.ip_pool import IpSlotPool
 
-    backend = _FakeBackend(running_after=1)
+    # Windows VMX — pool guard requires guest_os != "linux".
+    win_vmx = tmp_path / "templates" / "WinBuild2025.vmx"
+    win_vmx.parent.mkdir(parents=True)
+    win_vmx.write_text('guestOS = "windows10srv-64"\n', encoding="utf-8")
+
+    backend = _FakeBackend(running_after=1, clone_guest_os="windows10srv-64")
     calls = _patch_common(monkeypatch, backend)
 
     pool_addresses = ["192.168.79.201"]
@@ -614,7 +623,7 @@ def test_job_with_ip_pool_uses_preassigned_ip(
     base_artifact = tmp_path / "artifacts"
 
     result = CliRunner().invoke(
-        cli, _common_args(template_vmx, clone_base=base_clone, artifact_base=base_artifact)
+        cli, _common_args(win_vmx, clone_base=base_clone, artifact_base=base_artifact)
     )
     assert result.exit_code == 0, result.output
 
@@ -629,11 +638,8 @@ def test_job_with_ip_pool_uses_preassigned_ip(
     released = IpSlotPool(pool_addresses, "255.255.255.0", "", lease_file)._read_leases()
     assert released["192.168.79.201"] is None
 
-    # Build was invoked with the pool IP.
-    assert calls["linux_build"][0]["ip_address"] == "192.168.79.201"
-
-    # VMX injection confirmed via log output (clone dir removed after job).
-    assert "pre-assigned" in result.output
+    # Build was invoked with the pool IP via the Windows branch.
+    assert calls["windows_build"][0]["ip_address"] == "192.168.79.201"
 
 
 def test_destroy_clone_releases_pool_ip(tmp_path: Path) -> None: