tests/testthat/test-toJSON-keep-vec-names.R

In jsonlite: A Simple and Robust JSON Parser and Generator for R

context("toJSON keep_vec_names")

test_that("keep_vec_names with named vectors", {
  # Basic types should give messages
  # Length-1 vectors
  expect_message(expect_equal(toJSON2(c(a = 1)), '{"a":1}'))
  expect_message(expect_equal(toJSON2(c(a = "x")), '{"a":"x"}'))
  expect_message(expect_equal(toJSON2(c(a = TRUE)), '{"a":true}'))

  # Longer vectors
  expect_message(expect_equal(toJSON2(c(a = 1, b = 2)), '{"a":1,"b":2}'))
  expect_message(expect_equal(toJSON2(c(a = "x", b = "y")), '{"a":"x","b":"y"}'))
  expect_message(expect_equal(toJSON2(c(a = FALSE, b = TRUE)), '{"a":false,"b":true}'))

  # Some other types
  expect_message(expect_equal(toJSON2(factor(c(a = "x"))), '{"a":"x"}'))
  expect_message(expect_equal(toJSON2(c(a = as.Date("2015-01-01"))), '{"a":"2015-01-01"}'))
  expect_message(expect_equal(toJSON2(c(a = as.POSIXct("2015-01-01 3:00:00"))), '{"a":"2015-01-01 03:00:00"}'))
  expect_message(expect_equal(toJSON2(c(a = as.POSIXlt("2015-01-01 3:00:00"))), '{"a":"2015-01-01 03:00:00"}'))

  # keep_vec_names shouldn't affect unnamed vectors
  expect_equal(toJSON2(1), '1')
  expect_equal(toJSON2(c(1:3)), '[1,2,3]')
})


# Data frames generally don't allow named columns, except in very unusual cases
test_that("keep_vec_names with data frames", {
  expect_equal(toJSON3(data.frame(x = c(a = 1), y = 2)), '{"x":[1],"y":[2]}')
  expect_equal(toJSON3(data.frame(x = c(a = 1, b = 2), y = c(c = 3, d = 4))), '{"x":[1,2],"y":[3,4]}')
})