tests/testthat/test-Httr2Adapter.R

In webmockr: Stubbing and Setting Expectations on 'HTTP' Requests

context("Httr2Adapter")

skip_if_not_installed("httr2")
library("httr2")

aa <- Httr2Adapter$new()

test_that("Httr2Adapter bits are correct", {
  skip_on_cran()

  expect_is(Httr2Adapter, "R6ClassGenerator")

  expect_is(aa, "Httr2Adapter")
  expect_null(aa$build_httr_request) # pulled out of object, so should be NULL
  expect_null(aa$build_httr_response) # pulled out of object, so should be NULL
  expect_is(aa$disable, "function")
  expect_is(aa$enable, "function")
  expect_is(aa$handle_request, "function")
  expect_is(aa$remove_stubs, "function")
  expect_is(aa$name, "character")

  expect_equal(aa$name, "Httr2Adapter")
})


test_that("Httr2Adapter behaves correctly", {
  skip_on_cran()

  expect_message(aa$enable(), "Httr2Adapter enabled!")
  expect_message(aa$disable(), "Httr2Adapter disabled!")
})


test_that("build_httr_request/response fail well", {
  skip_on_cran()

  expect_error(build_httr_request(), "argument \"x\" is missing")
  expect_error(build_httr_response(), "argument \"req\" is missing")
})

test_that("Httr2Adapter: works when vcr is loaded but no cassette is inserted", {
  skip_on_cran()
  skip_if_not_installed("vcr")

  webmockr::enable(adapter = "httr2")
  on.exit({
    webmockr::disable(adapter = "httr2")
    unloadNamespace("vcr")
  })

  stub_request("get", hb("/get"))
  library("vcr")

  # works when no cassette is loaded
  expect_silent((x <- request(hb("/get")) %>% req_perform()))
  expect_s3_class(x, "httr2_response")

  # # works when empty cassette is loaded
  vcr::vcr_configure(dir = tempdir())
  vcr::insert_cassette("empty")
  expect_silent((x <- request(hb("/get")) %>% req_perform()))
  vcr::eject_cassette("empty")
  expect_s3_class(x, "httr2_response")
})


context("Httr2Adapter: date slot")
test_that("Httr2Adapter date slot works", {
  skip_on_cran()
  skip_if_not_installed("vcr")
  library("vcr")

  path <- file.path(tempdir(), "foobar")
  vcr::vcr_configure(dir = path)
  vcr::use_cassette("test-date", request(hb("/get")) %>% req_perform())
  # list.files(path)
  # readLines(file.path(path, "test-date.yml"))
  vcr::insert_cassette("test-date")

  x <- request(hb("/get")) %>% req_perform()

  # $headers$date is a different format
  expect_is(x$headers$date, "character")
  expect_error(format(x$headers$date, "%Y-%m-%d %H:%M"), "invalid 'trim'")

  vcr::eject_cassette("test-date")

  # cleanup
  unlink(path, recursive = TRUE)
})


# library(httr2)
# z <- request(hb("/get")) %>% req_perform()
# httr2_obj <- z$request
# save(httr2_obj, file = "tests/testthat/httr2_obj.rda", version = 2)

context("Httr2Adapter: works with real data")
test_that("Httr2Adapter works", {
  skip_on_cran()
  skip_if_not_installed("vcr")

  load("httr2_obj.rda")
  # load("tests/testthat/httr2_obj.rda")
  res <- Httr2Adapter$new()

  # with vcr message
  library("vcr")
  expect_error(
    res$handle_request(httr2_obj),
    "There is currently no cassette in use"
  )

  # with webmockr message
  # unload vcr
  unloadNamespace("vcr")
  expect_error(
    res$handle_request(httr2_obj),
    "Real HTTP connections are disabled"
  )

  invisible(stub_request("get", hb("/get")))

  aa <- res$handle_request(httr2_obj)

  expect_is(res, "Httr2Adapter")
  expect_is(aa, "httr2_response")
  expect_null(aa$request$method)
  expect_equal(aa$url, hb("/get"))

  # no response headers
  expect_equal(length(aa$headers), 0)

  # with headers
  # clear registry
  stub_registry_clear()

  # stub with headers
  x <- stub_request("get", hb("/get"))
  x <- to_return(x, headers = list("User-Agent" = "foo-bar"))

  aa <- res$handle_request(httr2_obj)

  expect_is(res, "Httr2Adapter")
  expect_is(aa, "httr2_response")
  expect_null(aa$request$method)
  expect_equal(aa$url, hb("/get"))

  # has headers and all_headers
  expect_equal(length(aa$headers), 1)
  expect_s3_class(aa$headers, "httr2_headers")
  expect_named(aa$headers, "user-agent")

  # stub with redirect headers
  my_url <- "https://doi.org/10.1007/978-3-642-40455-9_52-1"
  x <- stub_request("get", my_url)
  x <- to_return(x,
    status = 302, headers =
      list(
        status = 302,
        location = "http://link.springer.com/10.1007/978-3-642-40455-9_52-1"
      )
  )

  httr2_obj$url <- my_url
  res <- Httr2Adapter$new()
  aa <- res$handle_request(httr2_obj)

  expect_null(aa$request$method)
  expect_equal(aa$url, my_url)
  expect_equal(aa$status_code, 302)

  # has headers and all_headers
  expect_equal(length(aa$headers), 2)
  expect_s3_class(aa$headers, "httr2_headers")
  expect_equal(sort(names(aa$headers)), c("location", "status"))
})

test_that("Httr2Adapter works with req_auth_basic", {
  skip_on_cran()

  unloadNamespace("vcr")
  httr_mock()
  # httr_mock(FALSE)
  # webmockr_allow_net_connect()
  stub_registry_clear()
  # stub_registry()
  # request_registry()
  z <- stub_request("get", uri = hb("/basic-auth/foo/bar")) %>%
    to_return(
      body = list(foo = "bar"),
      headers = list("Content-Type" = "application/json")
    )

  # mocked httr2 requests with auth work
  x <- request(hb("/basic-auth/foo/bar")) %>%
    req_auth_basic("foo", "bar") %>%
    req_perform()
  expect_is(x, "httr2_response")
  expect_equal(
    jsonlite::fromJSON(rawToChar(x$body)),
    list(authenticated = TRUE, user = "foo")
  )
  expect_s3_class(x$headers, "httr2_headers")
  expect_equal(x$status_code, 200)

  # Httr2Adapter works on requests with auth
  # x <- request(hb("/basic-auth/foo/bar")) %>%
  #   req_auth_basic("foo", "bar") %>%
  #   req_perform()
  # httr2_obj_auth <- x$request
  # save(httr2_obj_auth, file = "tests/testthat/httr2_obj_auth.rda", version = 2)
  # load("tests/testthat/httr2_obj_auth.rda")
  load("httr2_obj_auth.rda")
  zz <- Httr2Adapter$new()
  z <- zz$handle_request(httr2_obj_auth)
  expect_is(z, "httr2_response")
  expect_equal(
    jsonlite::fromJSON(rawToChar(z$body)),
    list(foo = "bar")
  )
  expect_s3_class(z$headers, "httr2_headers")
  expect_equal(z$status_code, 200)
})

test_that("httr2 works with webmockr_allow_net_connect", {
  skip_on_cran()

  unloadNamespace("vcr")

  enable()
  stub_registry_clear()
  z <- stub_request("get", uri = hb("/get")) %>%
    wi_th(query = list(stuff = "things")) %>%
    to_return(body = "yum=cheese")
  req <- request(hb("/get")) %>% req_url_query(stuff = "things")
  x <- req_perform(req)
  expect_true(resp_body_string(x) == "yum=cheese")

  # disable net connect - now real requests can't be made
  webmockr_disable_net_connect()
  stub_registry_clear()
  expect_error(
    req_perform(req),
    "Real HTTP connections are disabled"
  )

  # allow net connect - stub still exists though - so not a real request
  webmockr_allow_net_connect()
  z <- stub_request("get", uri = hb("/get")) %>%
    wi_th(query = list(stuff = "things")) %>%
    to_return(body = "yum=cheese")
  req <- request(hb("/get")) %>% req_url_query(stuff = "things")
  z <- req_perform(req)
  expect_true(resp_body_string(z) == "yum=cheese")

  # allow net connect - stub now gone - so real request should happen
  stub_registry_clear()
  req <- request(hb("/get")) %>% req_url_query(stuff = "things")
  httr2::local_mocked_responses(NULL)
  w <- req_perform(req)
  expect_false(resp_body_string(w) == "yum=cheese")
})

test_that("httr2 requests with bodies work", {
  skip_on_cran()

  enable()
  stub_registry_clear()
  z <- stub_request("post", uri = hb("/post")) %>%
    to_return(body = "asdffsdsdf")
  req <- request(hb("/post")) %>%
    req_body_json(list(stuff = "things"))
  x <- req_perform(req)
  expect_true(httr2::resp_body_string(x) == "asdffsdsdf")

  # now with allow net connect
  stub_registry_clear()
  httr2_mock(FALSE)
  webmockr_allow_net_connect()
  req <- request(hb("/post")) %>%
    req_body_json(list(stuff = "things"))
  x <- req_perform(req)
  expect_identical(httr2::resp_body_json(x)$json, list(stuff = "things"))

  webmockr_disable_net_connect()
})

disable()

test_that("httr2 requests with nested list bodies work", {
  skip_on_cran()

  enable()
  # httr_mock()
  stub_registry_clear()
  body <- list(id = " ", method = "x", params = list(pwd = "p", user = "a"))
  z <- stub_request("post", uri = hb("/post")) %>%
    wi_th(body = body) %>%
    to_return(body = "asdffsdsdf")
  x <- request(hb("/post")) %>%
    req_body_json(body) %>%
    req_perform()
  expect_true(rawToChar(x$body) == "asdffsdsdf")

  # now with allow net connect
  stub_registry_clear()
  webmockr_allow_net_connect()
  response_real <- request(hb("/post")) %>%
    req_body_json(body) %>%
    req_perform()
  expect_equal(
    jsonlite::fromJSON(rawToChar(response_real$body))$json,
    body
  )

  webmockr_disable_net_connect()
})