What is the expected error code returned if the IoTHub device is disabled while still connected?

Question

I would like to know what is the expected error code returned if the IoTHub device is disabled while still connected in the IoTHub. I tested it with the scenario below:

Scenario A:

1. Device is connected to iothub.
2. Disable the device in azure iot explorer.
3. Device was disconnected.

Actual result: Error code received was IOTHUB_CLIENT_CONNECTION_NO_NETWORK

I expect that the error code should be IOTHUB_CLIENT_CONNECTION_DEVICE_DISABLED

Scenario B:

1. Disable the device first in iothub.
2. Device will attempt the connection. Actual result: error code received was IOTHUB_CLIENT_CONNECTION_DEVICE_DISABLED

Scenario B is expected. How about scenario A?

Thank you very much for your support!

Answer 1

Foo["value"] is the same as writing string | number. It has no relation to the parameter o.

As a workaround, you can use this pattern:

export function foo<Foo extends Any>(o: Foo): Foo["value"] {
  switch (o.type) {
    case "string":
      let v1 = o.value;
      v1 = "42";
      return v1;
    case "number":
      let v2 = o.value;
      v2 = "42"; // Type 'string' is not assignable to type 'number'.(2322)
      return v2;
  }
}

The idea is that let v2 = o.value pins v2 to have type number due to type narrowing. Then you get the error. Unfortunately you need a variable for each case, if you use let v = o.value before the switch v will have type string | number.