Does code return a reference to the expected object?

expect_reference() compares the underlying memory addresses of two symbols. It is for expert use only.

expect_reference(
  object,
  expected,
  info = NULL,
  label = NULL,
  expected.label = NULL
)

Arguments

object	Computation and value to compare it to. Both arguments supports limited unquoting to make it easier to generate readable failures within a function or for loop. See quasi_label for more details.
expected	Computation and value to compare it to. Both arguments supports limited unquoting to make it easier to generate readable failures within a function or for loop. See quasi_label for more details.
info	Extra information to be included in the message. This argument is soft-deprecated and should not be used in new code. Instead see alternatives in quasi_label.
label	Used to customise failure messages. For expert use only.
expected.label	Used to customise failure messages. For expert use only.

3rd edition

expect_reference() is deprecated in the third edition. If you know what you're doing, and you really need this behaviour, just use is_reference() directly: expect_true(rlang::is_reference(x, y)).

See also

Other expectations: comparison-expectations, equality-expectations, expect_error(), expect_length(), expect_match(), expect_named(), expect_null(), expect_output(), expect_silent(), inheritance-expectations, logical-expectations