object <- as.Date("1985-06-18")

test_that("Encoding Date Objects", {
  expect_equal(toJSON(object), "[\"1985-06-18\"]")
  expect_equal(toJSON(object, Date = "ISO8601"), "[\"1985-06-18\"]")
  expect_equal(toJSON(object, Date = "epoch"), "[5647]")
  expect_error(toJSON(object, Date = "adsfdsfds"), "should be one of")
})

test_that("Encoding Date Objects in a list", {
  expect_equal(toJSON(list(foo = object)), "{\"foo\":[\"1985-06-18\"]}")
  expect_equal(toJSON(list(foo = object), Date = "ISO8601"), "{\"foo\":[\"1985-06-18\"]}")
  expect_equal(toJSON(list(foo = object), Date = "epoch"), "{\"foo\":[5647]}")
  expect_error(toJSON(list(foo = object), Date = "adsfdsfds"), "should be one of")
})

test_that("Encoding Date Objects in a Data frame", {
  expect_equal(toJSON(data.frame(foo = object)), "[{\"foo\":\"1985-06-18\"}]")
  expect_equal(toJSON(data.frame(foo = object), Date = "ISO8601"), "[{\"foo\":\"1985-06-18\"}]")
  expect_equal(toJSON(data.frame(foo = object), Date = "epoch"), "[{\"foo\":5647}]")
  expect_error(toJSON(data.frame(foo = object), Date = "adsfdsfds"), "should be one of")
})