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test_that("Basic operations", {
s <- faststack()
expect_identical(s$size(), 0L)
s$push(5)
s$push(6)
s$push(NULL)
s$push(list(a=1, b=2))
s$mpush(.list=list(NULL))
s$mpush(.list=list(NULL,7))
s$mpush(8, .list=list(10), 9)
# as_list() returns in the order that they were inserted
expect_identical(
s$as_list(),
list(
5,
6,
NULL,
list(a=1, b=2),
NULL,
NULL,
7,
8,
9,
10
)
)
expect_identical(s$pop(), 10)
expect_identical(s$pop(), 9)
expect_identical(s$pop(), 8)
expect_identical(s$pop(), 7)
expect_identical(s$pop(), NULL)
expect_identical(s$pop(), NULL)
expect_identical(s$pop(), list(a=1, b=2))
expect_identical(s$peek(), NULL)
expect_identical(s$pop(), NULL)
expect_identical(s$size(), 2L)
expect_identical(s$as_list(), list(5, 6))
s$reset()
expect_identical(s$size(), 0L)
expect_identical(s$as_list(), list())
})
test_that("Pushing multiple", {
s <- faststack()
s$mpush(1,2,3)
s$mpush(4,5, .list = list(6, list(7,8)))
s$mpush(9,10)
expect_identical(s$as_list(), list(1,2,3,4,5,6,list(7,8),9,10))
expect_identical(s$pop(), 10)
expect_identical(s$pop(), 9)
expect_identical(s$pop(), list(7,8))
})
test_that("Popping from empty stack", {
s <- faststack()
expect_null(s$pop())
expect_null(s$pop())
expect_null(s$peek())
expect_identical(s$size(), 0L)
s$push(5)
s$push(6)
expect_identical(s$as_list(), list(5, 6))
})
test_that("Different values when popping from an empty stack", {
s <- faststack()
expect_identical(s$pop(missing = "foo"), "foo")
expect_identical(s$peek(missing = "foo"), "foo")
s <- faststack(missing_default = key_missing())
expect_identical(s$pop(), key_missing())
expect_identical(s$pop(), key_missing())
expect_identical(s$peek(), key_missing())
expect_identical(s$size(), 0L)
s$push(5)
s$push(6)
expect_identical(s$pop(), 6)
expect_identical(s$pop(), 5)
expect_identical(s$pop(missing = "foo"), "foo")
expect_identical(s$pop(), key_missing())
})
test_that("Error expressions prevent any from being added", {
s <- faststack()
expect_error(s$push(1, stop("2"), 3))
expect_identical(s$size(), 0L)
expect_null(s$peek())
expect_identical(s$as_list(), list())
expect_error(s$push(1, .list = list(2, stop("3")), 4))
expect_identical(s$size(), 0L)
expect_null(s$peek())
expect_identical(s$as_list(), list())
})
test_that("mpop()", {
s <- faststack(2L)
s$mpush(1,2,3,4,5,6,7,8,9,10,11,12,13)
expect_identical(s$mpop(6), list(13,12,11,10,9,8))
expect_identical(s$as_list(), list(1,2,3,4,5,6,7))
expect_identical(s$size(), 7L)
# Check that we did NOT resize the underlying list since we haven't gone under
# the 1/2 threshold.
expect_identical(env(s)$s, c(list(1,2,3,4,5,6,7), rep(list(NULL), 6)))
expect_identical(s$mpop(1), list(7))
expect_identical(s$as_list(), list(1,2,3,4,5,6))
expect_identical(s$size(), 6L)
# Now we should have resized.
expect_identical(env(s)$s, list(1,2,3,4,5,6))
expect_identical(s$mpop(9), list(6,5,4,3,2,1,NULL,NULL,NULL))
expect_identical(env(s)$s, list(NULL,NULL))
expect_identical(s$size(), 0L)
# Different `missing`
s <- faststack(2, missing_default = NA)
s$mpush(1,2,3,4,5,6,7,8,9,10,11,12,13)
expect_identical(s$mpop(6), list(13,12,11,10,9,8))
expect_identical(s$mpop(9), list(7,6,5,4,3,2,1,NA,NA))
expect_identical(s$mpop(3, missing = "x"), list("x","x","x"))
})
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