Add test for measure_time

tests/utils/test_measure_time.py

@@ -0,0 +1,34 @@
+from unittest.mock import MagicMock
+
+import time_machine
+
+from freqtrade.util import MeasureTime
+
+
+def test_measure_time():
+
+    callback = MagicMock()
+    with time_machine.travel("2021-09-01 05:00:00 +00:00", tick=False) as t:
+
+        measure = MeasureTime(callback, 5, ttl=60)
+        with measure:
+            pass
+
+        assert callback.call_count == 0
+
+        with measure:
+            t.shift(10)
+
+        assert callback.call_count == 1
+        callback.reset_mock()
+        with measure:
+            t.shift(10)
+        assert callback.call_count == 0
+
+        callback.reset_mock()
+        # Shift past the ttl
+        t.shift(45)
+
+        with measure:
+            t.shift(10)
+        assert callback.call_count == 1