context("test-queue.R")
test_that("we can construct an empty queue", {
queue <- empty_queue()
expect_true(is_queue_empty(queue))
})
test_that("we enqueue and dequeue", {
queue <- empty_queue()
expect_true(is_queue_empty(queue))
queue <- enqueue(queue, 1)
queue <- enqueue(queue, 2)
queue <- enqueue(queue, 3)
library(pmatch)
bind[front, queue] <- front(queue)
expect_equal(front, 1)
expect_equal(as.vector(queue$front), 1:3)
expect_true(ll_is_nil(queue$back))
queue <- dequeue(queue)
expect_equal(as.vector(queue$front), 2:3)
expect_true(ll_is_nil(queue$back))
})
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