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ipn/{ipnauth,ipnlocal,ipnserver}, client/tailscale: make ipnserver.Server testable

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We update client/tailscale.LocalClient to allow specifying an optional Transport
(http.RoundTripper) for LocalAPI HTTP requests, and implement one that injects
an ipnauth.TestActor via request headers. We also add several functions and types
to make testing an ipn/ipnserver.Server possible (or at least easier).

We then use these updates to write basic tests for ipnserver.Server,
ensuring it works on non-Windows platforms and correctly sets and unsets
the LocalBackend's current user when a Windows user connects and disconnects.

We intentionally omit tests for switching between different OS users
and will add them in follow-up commits.

Updates tailscale/corp#25804

Signed-off-by: Nick Khyl <nickk@tailscale.com>
This commit is contained in:
Nick Khyl
2025-01-13 17:37:29 -06:00
committed by Nick Khyl
parent d0ba91bdb2
commit c3c4c96489
4 changed files with 389 additions and 3 deletions
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9
ipn/ipnlocal/local.go
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@@ -3659,6 +3659,15 @@ func (b *LocalBackend) SetCurrentUser(actor ipnauth.Actor) (ipn.WindowsUserID, e
return uid, nil
}
// CurrentUserForTest returns the current user and the associated WindowsUserID.
// It is used for testing only, and will be removed along with the rest of the
// "current user" functionality as we progress on the multi-user improvements (tailscale/corp#18342).
func (b *LocalBackend) CurrentUserForTest() (ipn.WindowsUserID, ipnauth.Actor) {
b.mu.Lock()
defer b.mu.Unlock()
return b.pm.CurrentUserID(), b.currentUser
}
func (b *LocalBackend) CheckPrefs(p *ipn.Prefs) error {
b.mu.Lock()
defer b.mu.Unlock()