feat: add timer for metrics purposes

tests/ahriman/models/test_metrics_timer.py

@@ -0,0 +1,42 @@
+import pytest
+import time
+
+from ahriman.core.exceptions import InitializeError
+from ahriman.models.metrics_timer import MetricsTimer
+
+
+def test_elapsed() -> None:
+    """
+    must return elapsed time
+    """
+    with MetricsTimer() as timer:
+        value1 = timer.elapsed
+        time.sleep(0.1)
+        value2 = timer.elapsed
+        assert value2 > value1
+
+
+def test_elapsed_exception() -> None:
+    """
+    must raise InitializeError if timer wasn't started in the context manager
+    """
+    timer = MetricsTimer()
+    with pytest.raises(InitializeError):
+        assert timer.elapsed
+
+
+def test_enter() -> None:
+    """
+    must start timer with context manager
+    """
+    with MetricsTimer() as timer:
+        assert timer.start_time > 0
+
+
+def test_exit_with_exception() -> None:
+    """
+    must exit from context manager if an exception is raised
+    """
+    with pytest.raises(ValueError):
+        with MetricsTimer():
+            raise ValueError()

tests/ahriman/models/test_waiter.py

@@ -1,5 +1,4 @@
 import pytest
-import time
 
 from ahriman.models.waiter import Waiter, WaiterResult, WaiterTaskFinished, WaiterTimedOut
 
@@ -37,17 +36,17 @@ def test_is_timed_out() -> None:
     """
     must correctly check if timer runs out
     """
-    assert Waiter(-1).is_timed_out()
-    assert Waiter(1, start_time=time.monotonic() - 10.0).is_timed_out()
-    assert not Waiter(1, start_time=time.monotonic() + 10.0).is_timed_out()
+    assert Waiter(-1).is_timed_out(0.0)
+    assert Waiter(1).is_timed_out(42.0)
+    assert not Waiter(1).is_timed_out(0.42)
 
 
 def test_is_timed_out_infinite() -> None:
     """
     must treat 0 wait timeout as infinite
     """
-    assert not Waiter(0).is_timed_out()
-    assert not Waiter(0, start_time=time.monotonic() - 10.0).is_timed_out()
+    assert not Waiter(0).is_timed_out(0.0)
+    assert not Waiter(0).is_timed_out(-1.0)
 
 
 def test_wait() -> None: