Adds test to verify that speed replies from the listener protocol cor…

…rectly

clear the estopActive_ in the throttle client cache.

src/openlcb/TractionThrottle.cxxtest

@@ -533,6 +533,23 @@ TEST_F(ThrottleClientTest, ListenerCallback)
     // send another speed command to verify that E-Stop gets cleared
     throttle_.set_speed(v);
     EXPECT_FALSE(throttle_.get_emergencystop());
+
+    // Go back to estop.
+    EXPECT_CALL(l, update(-1));
+    EXPECT_FALSE(throttle_.get_emergencystop());
+    send_packet(":X195EB330N077102;"); // E-Stop
+    wait();
+    Mock::VerifyAndClear(&l);
+    EXPECT_TRUE(throttle_.get_emergencystop());
+
+    // Speed replies will also clear estop.
+    EXPECT_CALL(l, update(-1));
+    send_packet(":X195EB330N07710045D0;"); // speed 13 mph
+    wait();
+    Mock::VerifyAndClear(&l);
+    EXPECT_NEAR(13, throttle_.get_speed().mph(), 0.1);
+    EXPECT_EQ(Velocity::FORWARD, throttle_.get_speed().direction());
+    EXPECT_FALSE(throttle_.get_emergencystop());
 }
 
 } // namespace openlcb