test_that("Numeric of length 1 between zero and 90", {
expect_length(make_lat(river = "Hudson", species = "AMS"), 1)
expect_type(make_lat(river = "Hudson", species = "AMS"), "double")
expect_gt(make_lat(river = "Hudson", species = "AMS"), 0)
expect_lt(make_lat(river = "Hudson", species = "AMS"), 90)
})
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