test: refactor: rename wait_for_up to wait_for_ssh_up

To indicate that we're really waiting until sshd is up and accepting
connections, as a proxy for the actual boot process.

Suggested during code review in #4798.

Signed-off-by: Patrick Roy <roypat@amazon.co.uk>

tests/framework/microvm.py

@@ -654,7 +654,7 @@ def spawn(
         if "no-api" not in self.jailer.extra_args:
             self._wait_create()
         if "config-file" in self.jailer.extra_args and self.iface:
-            self.wait_for_up()
+            self.wait_for_ssh_up()
         if self.log_file and log_level in ("Trace", "Debug", "Info"):
             self.check_log_message("Running Firecracker")
 
@@ -879,7 +879,7 @@ def start(self):
         assert self.state == "Running"
 
         if self.iface:
-            self.wait_for_up()
+            self.wait_for_ssh_up()
 
     def pause(self):
         """Pauses the microVM"""
@@ -963,7 +963,7 @@ def restore_from_snapshot(
         )
         # This is not a "wait for boot", but rather a "VM still works after restoration"
         if snapshot.net_ifaces and resume:
-            self.wait_for_up()
+            self.wait_for_ssh_up()
         return jailed_snapshot
 
     def enable_entropy_device(self):
@@ -1003,7 +1003,7 @@ def thread_backtraces(self):
                 )
         return "\n".join(backtraces)
 
-    def wait_for_up(self, timeout=10):
+    def wait_for_ssh_up(self, timeout=10):
         """Wait for guest running inside the microVM to come up and respond.
 
         :param timeout: seconds to wait.

tests/integration_tests/functional/test_pause_resume.py

@@ -50,15 +50,15 @@ def test_pause_resume(uvm_nano):
 
     # Verify guest is no longer active.
     with pytest.raises(AssertionError):
-        microvm.wait_for_up()
+        microvm.wait_for_ssh_up()
 
     # Verify emulation was indeed paused and no events from either
     # guest or host side were handled.
     verify_net_emulation_paused(microvm.flush_metrics())
 
     # Verify guest is no longer active.
     with pytest.raises(AssertionError):
-        microvm.wait_for_up()
+        microvm.wait_for_ssh_up()
 
     # Pausing the microVM when it is already `Paused` is allowed
     # (microVM remains in `Paused` state).