tests/testthat/test-packages.R

In grapes: Make Binary Operators

# library(testthat); devtools::load_all()

context("packages")

test_that("grow() loads from a package", {
  expect_error(1 %knit_params% 2)
  expect_error(knit_params(1, 2))
  expect_error(ls("package:knitr"))
  grow(knit_params, from = "knitr")
  expect_equal(1 %knit_params% 2, knit_params(1, 2))
  out = ls("package:knitr")
  expect_true(length(out) > 0)
  detach("package:knitr")
})

test_that("grow() can load everything from a package", {
  expect_error(1 %knit_params% 2)
  expect_equal(bunch(), character(0))
  grow(from = "knitr")
  expect_equal(1 %knit_params% 2, knit_params(1, 2))
  expect_true(length(bunch()) > 2)
  envir = as.environment("package:knitr")
  expect_equal(intersect(bunch(), functions()), character(0))
  expect_equal(intersect(bunch(), functions("knitr")), character(0))
  expect_equal(intersect(bunch("knitr"), functions()), character(0))
  expect_equal(intersect(bunch("knitr"), functions("knitr")), character(0))
  for(op in bunch())
    expect_true(is.function(environment()[[op]]))
  for(f in functions("knitr"))
    expect_true(is.function(envir[[f]]))
  detach("package:knitr")
})