How to use ^ operator in testing assert function

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,
1 
my_topic = "my_topic" <> user.id

    assert_receive %Phoenix.Socket.Broadcast{
        topic: ^my_topic,
        event: "update",
        payload: %{id: ^user.id, status: "ongoing"}
      }

I got an error

invalid argument for unary operator ^, expected an existing variable, got: ^user.id

How can I insert value to assert function in test?

1 Like
2

You can only use ^ with variables. First bind the expression to a variable and then match it:

var = user.id
assert ^var = value
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