rabbitmq-cli: Deleting a non-existing user or vhost is fine

This patch adapts several testcases to this behavior change. The goal is
to avoid transactions where there is no need for one.

deps/rabbitmq_cli/test/ctl/clear_permissions_command_test.exs

@@ -55,10 +55,9 @@ defmodule ClearPermissionsTest do
     assert @command.validate(["too", "many"], %{}) == {:validation_failure, :too_many_args}
   end
 
-  @tag user: "fake_user"
-  test "run: can't clear permissions for non-existing user", context do
-    assert @command.run([context[:user]], context[:opts]) ==
-             {:error, {:no_such_user, context[:user]}}
+  @tag user: "fake_user", vhost: @default_vhost
+  test "run: clearing permissions for non-existing user still succeeds", context do
+    assert @command.run([context[:user]], context[:opts]) == :ok
   end
 
   @tag user: @user, vhost: @default_vhost
@@ -85,9 +84,8 @@ defmodule ClearPermissionsTest do
   end
 
   @tag user: @user, vhost: "bad_vhost"
-  test "run: on an invalid vhost, return no_such_vhost error", context do
-    assert @command.run([context[:user]], context[:opts]) ==
-             {:error, {:no_such_vhost, context[:vhost]}}
+  test "run: clearing permissions on a non-existent vhost still succeeds", context do
+    assert @command.run([context[:user]], context[:opts]) == :ok
   end
 
   @tag user: @user, vhost: @specific_vhost

deps/rabbitmq_cli/test/ctl/clear_topic_permissions_command_test.exs

@@ -58,16 +58,14 @@ defmodule ClearTopicPermissionsTest do
              {:validation_failure, :too_many_args}
   end
 
-  @tag user: "fake_user"
-  test "run: can't clear topic permissions for non-existing user", context do
-    assert @command.run([context[:user]], context[:opts]) ==
-             {:error, {:no_such_user, context[:user]}}
+  @tag user: "fake_user", vhost: @specific_vhost
+  test "run: clearing topic permissions for non-existing user still succeeds", context do
+    assert @command.run([context[:user]], context[:opts]) == :ok
   end
 
   @tag user: @user, vhost: "bad_vhost"
-  test "run: on an invalid vhost, return no_such_vhost error", context do
-    assert @command.run([context[:user]], context[:opts]) ==
-             {:error, {:no_such_vhost, context[:vhost]}}
+  test "run: clearing topic permissions on an invalid vhost still succeeds", context do
+    assert @command.run([context[:user]], context[:opts]) == :ok
   end
 
   @tag user: @user, vhost: @specific_vhost

deps/rabbitmq_cli/test/ctl/delete_user_command_test.exs

@@ -45,8 +45,8 @@ defmodule DeleteUserCommandTest do
   end
 
   @tag user: @user
-  test "run: An invalid username returns an error", context do
-    assert @command.run(["no_one"], context[:opts]) == {:error, {:no_such_user, "no_one"}}
+  test "run: deleting a non-existing user still succeeds", context do
+    assert @command.run(["no_one"], context[:opts]) == :ok
   end
 
   @tag user: @user

deps/rabbitmq_cli/test/rabbitmqctl_test.exs

@@ -164,8 +164,8 @@ defmodule RabbitMQCtlTest do
   end
 
   test "a command that fails with an error exits with a reasonable error code" do
-    command = ["delete_user", "voldemort"]
-    capture_io(:stderr, fn -> error_check(command, exit_nouser()) end)
+    command = ["set_vhost_tags", "voldemort", "mytag"]
+    capture_io(:stderr, fn -> error_check(command, exit_dataerr()) end)
   end
 
   test "a mcommand with an unsupported option as the first command-line arg fails gracefully" do