context("Retrieving FIPS codes")

test_that("all FIPS codes returned when no state specified", {
  expect_equal(fips(),
               c("02", "01", "05", "04", "06", "08", "09", "11",
                 "10", "12", "13", "15", "19", "16", "17", "18",
                 "20", "21", "22", "25", "24", "23", "26", "27",
                 "29", "28", "30", "31", "37", "33", "38", "34",
                 "35", "32", "36", "39", "40", "41", "42", "44",
                 "45", "46", "47", "48", "49", "51", "50", "53",
                 "55", "54", "56"))
})

test_that("returns correct FIPS code for state", {
  expect_equal(fips(state = "nj"), "34")
  expect_equal(fips(state = "NJ"), "34")
  expect_equal(fips(state = "New Jersey"), "34")
  expect_equal(fips(state = "new jersey"), "34")
})

test_that("multiple states return appropriate FIPS codes", {
  expect_equal(fips(c("CA", "NJ", "AL", "XX", "SD")), c("06", "34", "01", NA, "46"))
  expect_equal(fips(c("CA", "New jersey", "AL", "XX", "sOutH dAkoTA")), c("06", "34", "01", NA, "46"))
})

test_that("returns correct FIPS code for county", {
  expect_equal(fips(state = "NJ", county = "mercer"), "34021")
  expect_equal(fips(state = "NJ", county = "mercer county"), "34021")
  expect_equal(fips(state = "NJ", county = "Mercer County"), "34021")
  expect_equal(fips(state = "new jersey", county = "mercer"), "34021")
  expect_equal(fips(state = "New Jersey", county = "Mercer County"), "34021")
})

test_that("multiple counties in same state return appropriate FIPS codes", {
  expect_equal(fips(state = "NJ", county = c("Bergen", "Hudson")), c("34003", "34017"))
  expect_equal(fips(state = "NJ", county = c("Hudson", "Bergen")), c("34017", "34003"))
  expect_equal(fips(state = "NJ", county = c("Bergen County", "Hudson")), c("34003", "34017"))
  expect_equal(fips(state = "NJ", county = c("bergen", "hudson county")), c("34003", "34017"))
})

test_that("returns correct FIPS if it starts with a 0", {
  expect_equal(fips(state = "AL"), "01")
  expect_equal(fips(state = "CA"), "06")
  expect_equal(fips(state = "AL", county = "autauga"), "01001")
  expect_equal(fips(state = "AL", county = "baldwin"), "01003")
  expect_equal(fips(state = "AL", county = "barbour"), "01005")
})

test_that("NA is returned for invalid state", {
  expect_true(is.na(fips(state = "Puerto Rico")))
})

test_that("error occurs for missing state", {
  expect_error(fips(county = "Mercer County"))
})

test_that("error occurs for county with list of states", {
  expect_error(fips(state = c("CA", "NJ"), county = "Mercer"))
})

test_that("error occurs for invalid counties", {
  expect_error(fips(state = "CA", county = "Fake County"))
  expect_error(fips(state = "CA", county = c("Fake County 1", "Fake County 2")))
})

# This is to ensure that the Shannon County -> Oglala Lakota County
# change that occurred in South Dakota (May 1, 2015) is properly reflected.
test_that("Oglala Lakota County is correctly in the data", {
  expect_error(fips(state = "SD", county = "Shannon County"))
  expect_equal(fips(state = "SD", county = "Oglala Lakota County"), "46102")
})

# This is to ensure that the Wade Hampton Census Area -> Kusilvak Census Area
# change that occured in Alaska (July 1, 2015) is properly reflected.
test_that("Kusilvak Census Area is correctly in the data", {
  expect_error(fips(state = "AK", county = "Wade Hampton Census Area"))
  expect_equal(fips(state = "AK", county = "Kusilvak Census Area"), "02158")
})