Nothing
data_dir <- file.path("..", "testdata")
tempfile_nc <- function() {
tempfile_helper("fldrange_")
}
########## simple case ##########
file_out <- tempfile_nc()
fldrange("SIS",
file.path(data_dir, "ex_fld.nc"),
file_out)
file <- nc_open(file_out)
test_that("data is correct", {
actual <- ncvar_get(file)
expected_data <- c(8, 8, 22, 8, 8)
expected <- array(expected_data)
expect_equivalent(actual, expected)
})
test_that("attributes are correct", {
actual <- ncatt_get(file, "lon", "units")$value
expect_equal(actual, "degrees_east")
actual <- ncatt_get(file, "lon", "long_name")$value
expect_equal(actual, "longitude")
actual <- ncatt_get(file, "lon", "standard_name")$value
expect_equal(actual, "longitude")
actual <- ncatt_get(file, "lon", "axis")$value
expect_equal(actual, "X")
actual <- ncatt_get(file, "lat", "units")$value
expect_equal(actual, "degrees_north")
actual <- ncatt_get(file, "lat", "long_name")$value
expect_equal(actual, "latitude")
actual <- ncatt_get(file, "lat", "standard_name")$value
expect_equal(actual, "latitude")
actual <- ncatt_get(file, "lat", "axis")$value
expect_equal(actual, "Y")
actual <- ncatt_get(file, "time", "units")$value
expect_equal(actual, "hours since 1983-01-01 00:00:00")
actual <- ncatt_get(file, "time", "long_name")$value
expect_equal(actual, "time")
actual <- ncatt_get(file, "time", "standard_name")$value
expect_equal(actual, "time")
actual <- ncatt_get(file, "time", "calendar")$value
expect_equal(actual, "standard")
actual <- ncatt_get(file, "SIS", "standard_name")$value
expect_equal(actual, "SIS_standard")
actual <- ncatt_get(file, "SIS", "long_name")$value
expect_equal(actual, "Surface Incoming Shortwave Radiation")
actual <- ncatt_get(file, "SIS", "units")$value
expect_equal(actual, "W m-2")
actual <- ncatt_get(file, "SIS", "_FillValue")$value
expect_equal(actual, -999)
actual <- ncatt_get(file, "SIS", "cmsaf_info")$value
expect_equal(actual, "cmsafops::fldrange for variable SIS")
global_attr <- ncatt_get(file, 0)
expect_equal(length(global_attr), 1)
actual <- names(global_attr[1])
expect_equal(actual, "Info")
actual <- global_attr[[1]]
expect_equal(actual, "Created with the CM SAF R Toolbox.")
})
test_that("coordinates are correct", {
actual <- ncvar_get(file, "lon")
expect_identical(actual, array(c(5.5)))
actual <- ncvar_get(file, "lat")
expect_identical(actual, array(c(45.5)))
actual <- ncvar_get(file, "time")
expect_equal(actual, array(c(149016, 149760, 150456, 151200, 151920)))
})
nc_close(file)
########## var does not exist #########
test_that("no error is thrown if var does not exist", {
file_out <- tempfile_nc()
expect_warning(fldmax("someVariable",
file.path(data_dir, "ex_fld.nc"),
file_out),
"Variable 'someVariable' not found. Variable 'SIS' will be used instead.")
})
########## var is empty #########
test_that("no error is thrown if var is empty", {
file_out <- tempfile_nc()
expect_warning(fldmax("",
file.path(data_dir, "ex_fld.nc"),
file_out),
"Variable '' not found. Variable 'SIS' will be used instead.")
})
########## var is NULL #########
test_that("error is thrown if var is NULL", {
file_out <- tempfile_nc()
expect_error(
fldmax(NULL,
file.path(data_dir, "ex_fld.nc"),
file_out),
"variable must not be NULL"
)
})
########## input file does not exist #########
test_that("error is thrown if input file does not exist", {
file_out <- tempfile_nc()
expect_error(
fldmax("SIS",
file.path(data_dir, "ex_doesNotExist.nc"),
file_out),
"Input file does not exist")
})
########## input filename is empty #########
test_that("error is thrown if input file is empty", {
file_out <- tempfile_nc()
expect_error(
fldmax("SIS",
"",
file_out),
"Input file does not exist")
})
########## input filename is NULL #########
test_that("error is thrown if input file is NULL", {
file_out <- tempfile_nc()
expect_error(
fldmax("SIS",
NULL,
file_out),
"Input filepath must be of length one and not NULL"
)
})
########## output file already exists #########
test_that("error is thrown if output file already exists", {
file_out <- tempfile_nc()
cat("test\n", file = file_out)
expect_error(
fldmax("SIS",
file.path(data_dir, "ex_fld.nc"),
file_out),
paste0("File '",
file_out,
"' already exists. Specify 'overwrite = TRUE' if you want to overwrite it."),
fixed = TRUE
)
expect_equal(readLines(con = file_out), "test")
})
########## output file already exists (overwrite = TRUE) #########
test_that("no error is thrown if overwrite = TRUE", {
file_out <- tempfile_nc()
cat("test\n", file = file_out)
expect_error(
fldmax("SIS",
file.path(data_dir, "ex_fld.nc"),
file_out,
overwrite = TRUE
),
NA)
})
########## output file is NULL #########
#TODO this should throw a clearer error
test_that("no error is thrown if output file already exists", {
expect_error(
fldmax("SIS",
file.path(data_dir, "ex_fld.nc"),
NULL),
"Output filepath must be of length one and not NULL"
)
})
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