r/tests/testthat/test-dplyr-funcs.R

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skip_on_cran()

test_that("register_binding()/unregister_binding() works", {
  fake_registry <- new.env(parent = emptyenv())
  fun1 <- function() NULL
  fun2 <- function() "Hello"

  expect_null(register_binding("some.pkg::some_fun", fun1, fake_registry))
  expect_identical(fake_registry$some_fun, fun1)
  expect_identical(fake_registry$`some.pkg::some_fun`, fun1)

  expect_identical(unregister_binding("some.pkg::some_fun", fake_registry), fun1)
  expect_false("some.pkg::some_fun" %in% names(fake_registry))
  expect_false("some_fun" %in% names(fake_registry))

  expect_null(register_binding("somePkg::some_fun", fun1, fake_registry))
  expect_identical(fake_registry$some_fun, fun1)

  expect_warning(
    register_binding("some.pkg2::some_fun", fun2, fake_registry),
    "A \"some_fun\" binding already exists in the registry and will be overwritten."
  )

  # No warning when an identical function is re-registered
  expect_silent(register_binding("some.pkg2::some_fun", fun2, fake_registry))
})

test_that("register_binding_agg() works", {
  fake_registry <- new.env(parent = emptyenv())
  fun1 <- function() NULL

  expect_null(register_binding_agg("somePkg::some_fun", fun1, fake_registry))
  expect_identical(fake_registry$some_fun, fun1)
  expect_identical(fake_registry$`somePkg::some_fun`, fun1)
})