message("\n---- Test st_crs2 ----")
skip_gdal_tests()

testthat::test_that(
  "st_crs2, input EPSG", {
    expect_equal_crs(st_crs2(9), 32609)
    expect_equal_crs(st_crs2("EPSG:32609"), 32609)
    expect_equal_crs(st_crs2("9N"), 32609)
    expect_equal_crs(st_crs2("9S"), 32709)
  }
)

testthat::test_that(
  "st_crs2, input raster file [path]", {
    raster_path <- system.file(
      "extdata/out/S2A2A_20190723_022_Barbellino_BOA_10.tif", 
      package="sen2r"
    )
    expect_equal_crs(st_crs2(raster_path), 32632)
    expect_equal_crs(st_crs2(stars::read_stars(raster_path)), 32632)
    # This test was skipped while raster is reading PROJ.4 instead than WKT,
    # and so the EPSG is being lost (#295).
    # testthat::expect_equal(st_crs2(raster::raster(raster_path))$epsg, 32632)
  }
)

testthat::test_that(
  "st_crs2, input vector file [path]", {
    raster_path <- system.file(
      "extdata/out/S2A2A_20190723_022_Barbellino_BOA_10.tif", 
      package="sen2r"
    )
    vector_path <- system.file(
      "extdata/vector/barbellino.geojson", 
      package="sen2r"
    )
    # 
    expect_equal_crs(st_crs2(raster_path), 32632)
    expect_equal_crs(st_crs2(stars::read_stars(raster_path)), 32632)
    # testthat::expect_equal(st_crs2(raster::raster(raster_path))$epsg, 32632)
    expect_equal_crs(st_crs2(vector_path), 32632)
    expect_equal_crs(st_crs2(sf::read_sf(vector_path)), 32632)
    expect_equal_crs(st_crs2(as(sf::read_sf(vector_path), "Spatial")), 32632)
  }
)

testthat::test_that(
  "st_crs2, generics and errors", {
    testthat::expect_error(st_crs2("wrong"), "invalid crs\\: wrong")
    testthat::expect_equal(st_crs2(NULL), sf::st_crs(NA))
    testthat::expect_equal(st_crs2(NA), sf::st_crs(NA))
    testthat::expect_equal(st_crs2(), sf::st_crs(NA))
  }
)


# testthat::skip_on_cran()
# testthat::skip_on_travis()

testthat::test_that(
  "st_crs2, input WKT", {
    wkt_32n <- st_as_text_2(st_crs(32609))
    writeLines(wkt_32n, wkt_32n_path <- tempfile())
    expect_equal_crs(st_crs2(wkt_32n), 32609)
    expect_equal_crs(st_crs2(wkt_32n_path), 32609)
  }
)

testthat::test_that(
  "st_crs2, input PROJ.4", {
    expect_equal_crs(st_crs2("+init=epsg:32609"), 32609)
    testthat::expect_warning(
      st_crs2("+proj=utm +zone=9 +datum=WGS84 +units=m +no_defs"),
      "Using PROJ\\.4 strings is deprecated with"
    )
  }
)