library(day4)
context("Perimeter")
test_that("perimeter of a circle", {
expect_equal(ellipse_perimeter(1), 2 * pi)
})
# test_that("perimeter of an ellipse", {
# a=2
# b=1
# e=sqrt(a**2 - b**2)/a
# expect_equal(ellipse_perimeter(a,e), 2 * pi)
# })
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