regular_date <- as.Date("2010-01-01")
text_date <- "Second of February, two thousand and twenty-two"
range <- as_messydate("2014-01-01..2014-01-03")
approximate <- as_messydate(c("~1999", "1999-10~", "1999-10-~11"))
unspecified <- as_messydate("2008-XX-03")
set <- as_messydate("{2012-01-01,2012-01-12}")
negative <- as_messydate("20 BC")
unspecified_range <- as_messydate("2010..2010-12")
negative_incomplete_range <- as_messydate("200 BC:199 BC")
negative_incomplete_set <- as_messydate("{-200, -199}")

test_that("Expand dates works properly for date ranges and unspecified dates", {
  expect_equal(expand(regular_date), expand(as_messydate(regular_date)))
  expect_length(expand(text_date), 1)
  expect_equal(as.character(expand(range)),
               "c(\"2014-01-01\", \"2014-01-02\", \"2014-01-03\")")
  expect_equal(as.character(expand(approximate)[[1]][1]), "1999-01-01")
  expect_equal(as.character(expand(approximate, approx_range = 3)[[2]][1]), "1996-07-01")
  expect_equal(as.character(expand(approximate, approx_range = 3)[[3]][1]), "1999-10-08")
  expect_equal(as.character(expand(unspecified)[[1]][1]), "2008-01-03")
  expect_equal(as.character(expand(set)[[1]][1]), "2012-01-01")
  expect_length(expand(range), 1)
  expect_length(expand(unspecified), 1)
  expect_equal(lengths(expand(negative)), 366)
  expect_equal(as.character(expand(unspecified_range)[[1]][1]), "2010-01-01")
  expect_equal(lengths(expand(unspecified_range)), 365)
  expect_equal(lengths(expand(negative_incomplete_range)), 730)
  expect_equal(lengths(expand(negative_incomplete_set)), 730)
})

ly <- as_messydate("~2000-01-01")
lym <- as_messydate("2000-~02-01")
test_that("Expand aproxximate works properly for leap years", {
  expect_equal(lengths(expand(ly, approx_range = 1)), 732)
  expect_equal(lengths(expand(lym, approx_range = 1)), 61)
})