Improve unittest

test/back2back_test.py

@@ -273,19 +273,22 @@ def test_sub_second_timestamp_resolution(self):
         self.bus2.recv(0)
         self.bus2.recv(0)
 
-    def test_perodic_tasks_do_not_exceed_duration(self):
-        duration, period = 2.0, 0.6
-        messages = []
-
-        self.bus2.send_periodic(can.Message(), period, duration)
-        while True:
-            msg = self.bus1.recv(period + 0.1)
-            if msg is None:
-                break
-            messages.append(msg)
-
-        delta_t = messages[-1].timestamp - messages[0].timestamp
-        assert delta_t <= duration
+    def test_send_periodic_duration(self):
+        """
+        Verify that send_periodic only transmits for the specified duration.
+
+        Regression test for #1713.
+        """
+        for params in [(0.01, 0.003), (0.1, 0.011), (1, 0.4)]:
+            duration, period = params
+            messages = []
+
+            self.bus2.send_periodic(can.Message(), period, duration)
+            while (msg := self.bus1.recv(period * 1.25)) is not None:
+                messages.append(msg)
+
+            delta_t = messages[-1].timestamp - messages[0].timestamp
+            assert delta_t <= duration
 
 
 @unittest.skipUnless(TEST_INTERFACE_SOCKETCAN, "skip testing of socketcan")