Add smoketest for login --token fix

Verifies that `spacetime login --token <token>` exits immediately
after saving the token, without falling through to the interactive
web login flow. Without the fix, this test would hang or fail in CI.

Author: clockwork-labs-bot

crates/smoketests/tests/smoketests/login.rs

@@ -0,0 +1,27 @@
+use spacetimedb_smoketests::Smoketest;
+
+/// Test that `spacetime login --token <token>` exits immediately after saving
+/// the token, without falling through to the interactive web login flow.
+///
+/// Without the fix in PR #4579, the command would fall through to the web
+/// login flow, which tries to open a browser and fails in CI.
+#[test]
+fn test_login_with_token_does_not_fallthrough() {
+    let test = Smoketest::builder()
+        .autopublish(false)
+        .build();
+
+    // A dummy token that won't decode to a valid identity.
+    let output = test.spacetime_cmd(&["login", "--token", "test-dummy-token"]);
+    let stdout = String::from_utf8_lossy(&output.stdout);
+    let stderr = String::from_utf8_lossy(&output.stderr);
+
+    assert!(
+        output.status.success(),
+        "Expected `spacetime login --token` to succeed, but it failed.\nstdout: {stdout}\nstderr: {stderr}"
+    );
+    assert!(
+        stdout.contains("Token saved."),
+        "Expected 'Token saved.' in output, got: {stdout}"
+    );
+}

crates/smoketests/tests/smoketests/mod.rs

@@ -18,6 +18,7 @@ mod domains;
 mod fail_initial_publish;
 mod filtering;
 mod http_egress;
+mod login;
 mod logs_level_filter;
 mod module_nested_op;
 mod modules;