ToshibaAC: More unit tests.

* Add checks for if we handle toggling an IRac state correctly if we receive a IR swing toggle message.

Ref: #1424 (comment)

test/IRac_test.cpp

@@ -2383,3 +2383,59 @@ TEST(TestIRac, Issue1339) {
   to_send.protocol = decode_type_t::HITACHI_AC1;
   ASSERT_TRUE(irac.sendAc(to_send, NULL));
 }
+
+// See if we handle an inbound Swing Toggle IR command correctly.
+// Ref: https://github.com/crankyoldgit/IRremoteESP8266/issues/1424#issuecomment-787998777
+TEST(TestIRac, Issue1424) {
+  IRToshibaAC ac(kGpioUnused);
+  IRac irac(kGpioUnused);
+  IRrecv capture(kGpioUnused);
+
+  ac.begin();
+  irac.next.protocol = decode_type_t::TOSHIBA_AC;  // Set a protocol to use.
+  irac.next.model = 1;  // Some A/Cs have different models. Try just the first.
+  irac.next.mode = stdAc::opmode_t::kFan;  // Run in Fan mode initially.
+  irac.next.celsius = true;  // Use Celsius for temp units. False = Fahrenheit
+  irac.next.degrees = 19;  // 19 degrees.
+  irac.next.fanspeed = stdAc::fanspeed_t::kAuto;  // Start the fan at Auto.
+  irac.next.swingv = stdAc::swingv_t::kOff;  // Don't swing the fan up or down.
+  irac.next.swingh = stdAc::swingh_t::kOff;  // Don't swing the fan left/right.
+  irac.next.light = true;  // Turn off any LED/Lights/Display that we can.
+  irac.next.beep = false;  // Turn off any beep from the A/C if we can.
+  irac.next.econo = false;  // Turn off any economy modes if we can.
+  irac.next.filter = false;  // Turn off any Ion/Mold/Health filters if we can.
+  irac.next.turbo = false;  // Don't use any turbo/powerful/etc modes.
+  irac.next.quiet = false;  // Don't use any quiet/silent/etc modes.
+  irac.next.sleep = -1;  // Don't set any sleep time or modes.
+  irac.next.clean = false;  // Turn off any Cleaning options if we can.
+  irac.next.clock = -1;  // Don't set any current time if we can avoid it.
+  irac.next.power = true;  // Initially start with the unit on.
+
+  // Start with the SwingV being off.
+  stdAc::state_t copy_of_next_pre_send = irac.next;
+  irac.sendAc();
+  // Confirm nothing in the state changed with the send.
+  ASSERT_FALSE(IRac::cmpStates(irac.next, copy_of_next_pre_send));
+
+
+  irac.next.swingv = stdAc::swingv_t::kAuto;  // Turn on the swing.
+  ASSERT_TRUE(IRac::cmpStates(irac.next, copy_of_next_pre_send));
+  copy_of_next_pre_send = irac.next;
+  irac.sendAc();
+  // Confirm it is NOT Off. i.e. On.
+  EXPECT_NE(stdAc::swingv_t::kOff, irac.next.swingv);
+  // Confirm nothing in the state changed with the send.
+  ASSERT_FALSE(IRac::cmpStates(irac.next, copy_of_next_pre_send));
+
+  stdAc::state_t copy_of_next_pre_receive = irac.next;  // aka. Prev.
+  // Simulate receiving a Swing Toggle message.
+  const uint8_t swingToggleState[kToshibaACStateLengthShort] = {
+        0xF2, 0x0D, 0x01, 0xFE, 0x21, 0x04, 0x25};
+  ac.setRaw(swingToggleState, kToshibaACStateLengthShort);
+  // Import the new "state" to IRac.
+  irac.next = ac.toCommon(&copy_of_next_pre_receive);
+  // The toggle should have turned the effective "On" state to "Off".
+  EXPECT_EQ(irac.next.swingv, stdAc::swingv_t::kOff);
+  // Confirm the state really did change.
+  ASSERT_TRUE(IRac::cmpStates(irac.next, copy_of_next_pre_receive));
+}