context("lawn_line_distance")
line <- '{
"type": "Feature",
"properties": {},
"geometry": {
"type": "LineString",
"coordinates": [
[-77.031669, 38.878605],
[-77.029609, 38.881946],
[-77.020339, 38.884084],
[-77.025661, 38.885821],
[-77.021884, 38.889563],
[-77.019824, 38.892368]
]
}
}'
a <- lawn_line_distance(line, 'kilometers')
b <- lawn_line_distance(line, 'miles')
d <- lawn_line_distance(line, 'radians')
e <- lawn_line_distance(line, 'degrees')
test_that("lawn_line_distance returns correct classes", {
expect_is(a, "numeric")
expect_is(b, "numeric")
expect_is(d, "numeric")
expect_is(e, "numeric")
})
test_that("right dimensions", {
expect_lt(d, e)
expect_lt(e, b)
expect_lt(b, a)
expect_equal(length(lawn_line_distance(line, 'miles')), 1)
})
test_that("lawn_line_distance fails correctly", {
# missing arguments
expect_error(lawn_line_distance(),
"argument \"line\" is missing, with no default")
# can't pass in a character string to cellWidth
expect_error(lawn_line_distance(line, 'stuff'))
# can't pass in a character string to cellWidth
expect_error(lawn_line_distance("{}", "miles"))
})
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