tests/testthat/test-curl.R

In httr2: Perform HTTP Requests and Process the Responses

test_that("must be call to curl", {
  expect_snapshot(error = TRUE, curl_translate("echo foo"))
})

test_that("must have cmd argument if non-interactive", {
  expect_snapshot(error = TRUE, curl_translate())
})

test_that("captures key components of call", {
  expect_equal(curl_args("curl http://x.com"), list(`<url>` = "http://x.com"))

  # Quotes are stripped
  expect_equal(curl_args("curl 'http://x.com'"), list(`<url>` = "http://x.com"))
  expect_equal(curl_args('curl "http://x.com"'), list(`<url>` = "http://x.com"))

  # Url can come before or after arguments
  expect_equal(
    curl_args("curl -H 'A: 1' 'http://example.com'"),
    curl_args("curl 'http://example.com' -H 'A: 1'")
  )
  # long name and short name are equivalent
  expect_equal(
    curl_args("curl 'http://example.com' --header 'A: 1'"),
    curl_args("curl 'http://example.com' -H 'A: 1'")
  )

  # can repeat args
  expect_equal(
    curl_args("curl 'http://example.com' -H 'A: 1' -H 'B: 2'")$`--header`,
    c("A: 1", "B: 2")
  )

  # Captures flags
  expect_equal(curl_args("curl 'http://example.com' --verbose")$`--verbose`,  TRUE)
})

test_that("can handle line breaks", {
  expect_equal(
    curl_args("curl 'http://example.com' \\\n -H 'A: 1' \\\n -H 'B: 2'")$`--header`,
    c("A: 1", "B: 2")
  )
})

test_that("headers are parsed", {
  expect_equal(
    curl_normalize("curl http://x.com -H 'A: 1'")$headers,
    as_headers("A: 1")
  )
})

test_that("user-agent and referer become headers", {
  expect_equal(
    curl_normalize("curl http://x.com -A test")$headers,
    as_headers(list("user-agent" = "test"))
  )

  expect_equal(
    curl_normalize("curl http://x.com -e test")$headers,
    as_headers(list("referer" = "test"))
  )
})

test_that("common headers can be removed", {
  sec_fetch_headers <- "-H 'Sec-Fetch-Dest: empty' -H 'Sec-Fetch-Mode: cors'"
  sec_ch_ua_headers <- "-H 'sec-ch-ua-mobile: ?0'"
  other_headers <- "-H 'Accept: application/vnd.api+json'"
  cmd <- paste("curl http://x.com -A agent -e ref", sec_fetch_headers, sec_ch_ua_headers, other_headers)
  headers <- curl_normalize(cmd)$headers
  expect_snapshot({
    print(curl_simplify_headers(headers, simplify_headers = TRUE))
    print(curl_simplify_headers(headers, simplify_headers = FALSE))
  })
})

test_that("extract user name and password", {
  expect_equal(
    curl_normalize("curl http://x.com -u name:pass")$auth,
    list(username = "name", password = "pass")
  )
  expect_equal(
    curl_normalize("curl http://x.com -u name")$auth,
    list(username = "name", password = "")
  )
})

test_that("can override default method", {
  expect_equal(curl_normalize("curl http://x.com")$method, NULL)
  expect_equal(curl_normalize("curl http://x.com --get")$method, "GET")
  expect_equal(curl_normalize("curl http://x.com --head")$method, "HEAD")
  expect_equal(curl_normalize("curl http://x.com -X PUT")$method, "PUT")
})

test_that("prefers explicit url", {
  expect_equal(curl_normalize("curl 'http://x.com'")$url, "http://x.com")
  expect_equal(curl_normalize("curl --url 'http://x.com'")$url, "http://x.com")

  # prefers explicit
  expect_equal(
    curl_normalize("curl 'http://x.com' --url 'http://y.com'")$url,
    "http://y.com"
  )
})

test_that("can translate to httr calls", {
  skip_if(getRversion() < "4.1")

  expect_snapshot({
    curl_translate("curl http://x.com")
    curl_translate("curl http://x.com -X DELETE")
    curl_translate("curl http://x.com -H A:1")
    curl_translate("curl http://x.com -H 'A B:1'")
    curl_translate("curl http://x.com -u u:p")
    curl_translate("curl http://x.com --verbose")
  })
})

test_that("can translate query", {
  skip_if(getRversion() < "4.1")

  expect_snapshot({
    curl_translate("curl http://x.com?string=abcde&b=2")
  })
})

test_that("can translate data", {
  skip_if(getRversion() < "4.1")

  expect_snapshot({
    curl_translate("curl http://example.com --data abcdef")
    curl_translate("curl http://example.com --data abcdef -H Content-Type:text/plain")
  })
})

test_that("can evaluate simple calls", {
  request_test() # hack to start server

  resp <- curl_translate_eval(glue("curl {the$test_app$url()}/get -H A:1"))
  body <- resp_body_json(resp)
  expect_equal(body$headers$A, "1")

  resp <- curl_translate_eval(glue("curl {the$test_app$url()}/post --data A=1"))
  body <- resp_body_json(resp)
  expect_equal(body$form$A, "1")

  resp <- curl_translate_eval(glue("curl {the$test_app$url()}/delete -X delete"))
  body <- resp_body_json(resp)
  expect_equal(body$method, "delete")

  resp <- curl_translate_eval(glue("curl {the$test_app$url()}//basic-auth/u/p -u u:p"))
  body <- resp_body_json(resp)
  expect_true(body$authenticated)
})

test_that("can read from clipboard", {
  # need to skip on CI and CRAN as can't read from clipboard there
  skip_on_ci()
  skip_on_cran()
  skip_if_not_installed("clipr")
  skip_if(getRversion() < "4.1")

  # need to set env var so that `read/write_clip()` works in non-interactive mode
  withr::local_envvar(CLIPR_ALLOW = TRUE)

  # suppress warning because the clipboard might contain no readable text
  old_clip <- suppressWarnings(clipr::read_clip())
  withr::defer(clipr::write_clip(old_clip))
  rlang::local_interactive()

  clipr::write_clip("curl 'http://example.com' \\\n -H 'A: 1' \\\n -H 'B: 2'")
  expect_snapshot({
    curl_translate()
    # also writes to clip
    clipr::read_clip()
  })
})

test_that("encode_string2() produces simple strings", {
  # double quotes is standard
  expect_equal(encode_string2("x"), encodeString("x", quote = '"'))
  # use single quotes if double quotes but not single quotes
  expect_equal(encode_string2('x"x'), encodeString('x"x', quote = "'"))

  skip_if_not(getRversion() >= "4.0.0")
  # use raw string if single and double quotes are used
  expect_equal(encode_string2('x"\'x'), 'r"---{x"\'x}---"')

  skip_if(getRversion() < "4.1")
  cmd <- paste0("curl 'http://example.com' \
  -X 'PATCH' \
  -H 'Content-Type: application/json' \
  --data-raw ", '{"data":{"x":1,"y":"a","nested":{"z":[1,2,3]}}}', "\
  --compressed")
  expect_snapshot(curl_translate(cmd))
})