CLI: add a test for 'ctl remove_classic_queue_mirroring_from_policies'

deps/rabbitmq_cli/lib/rabbitmq/cli/ctl/commands/remove_classic_queue_mirroring_from_policies_command.ex

@@ -39,5 +39,5 @@ defmodule RabbitMQ.CLI.Ctl.Commands.RemoveClassicQueueMirroringFromPoliciesComma
     do: "Removes all classic queue mirroring policies and operator policies"
 
   def banner([], %{}),
-    do: "Will remove all classic queue mirroring policies and operator policies"
+    do: "Will remove all regular policies and operator policies that enable classic queue mirroring"
 end

deps/rabbitmq_cli/test/ctl/remove_classic_queue_mirroring_from_policies_command_test.exs

@@ -0,0 +1,59 @@
+## This Source Code Form is subject to the terms of the Mozilla Public
+## License, v. 2.0. If a copy of the MPL was not distributed with this
+## file, You can obtain one at https://mozilla.org/MPL/2.0/.
+##
+## Copyright (c) 2016-2020 VMware, Inc. or its affiliates.  All rights reserved.
+
+defmodule RemoveClassicQueueMirroringFromPoliciesCommandTest do
+  use ExUnit.Case, async: false
+  import TestHelper
+
+  @command RabbitMQ.CLI.Ctl.Commands.RemoveClassicQueueMirroringFromPoliciesCommand
+
+  @vhost "/"
+
+  setup_all do
+    RabbitMQ.CLI.Core.Distribution.start()
+
+    start_rabbitmq_app()
+
+    on_exit([], fn ->
+      start_rabbitmq_app()
+    end)
+
+    :ok
+  end
+
+  setup do
+    {:ok,
+     opts: %{
+       node: get_rabbit_hostname(),
+       vhost: @vhost
+     }}
+  end
+
+  test "validate: specifying no arguments succeeds", context do
+    assert @command.validate([], context[:opts]) == :ok
+  end
+
+  test "validate: specifying a position argument is reported as an error", context do
+    assert @command.validate(["q1"], context[:opts]) ==
+             {:validation_failure, :too_many_args}
+  end
+
+  test "validate: specifying three queue names is reported as an error", context do
+    assert @command.validate(["q1", "q2", "q3"], context[:opts]) ==
+             {:validation_failure, :too_many_args}
+  end
+
+  test "run: request to a non-existent RabbitMQ node returns a nodedown" do
+    opts = %{node: :jake@thedog, vhost: @vhost, timeout: 200}
+    assert match?({:badrpc, _}, @command.run([], opts))
+  end
+
+  test "banner", context do
+    s = @command.banner([], context[:opts])
+
+    assert s =~ ~r/Will remove/
+  end
+end