library(makeParallel)
test_that("descendant removal", {
nodes = list(c(1, 2), c(1, 2, 4))
actual = hasAncestors(nodes)
expect_equal(c(FALSE, TRUE), actual)
})
test_that("find_var", {
expr = quote(x[1:5])
expect_equal(find_var(expr, "x"), list(2))
expr = quote(y[1:5])
expect_equal(find_var(expr, "x"), list())
expr = quote(mean(x[1:5]))
expect_equal(find_var(expr, "x"), list(c(2, 2)))
expr = quote(plot(dframe[, "d"]))
actual = find_var(expr, "dframe")
expect_equal(actual, list(c(2, 2)))
expr = quote(mean(x[1:5]) + x)
actual = find_var(expr, "x")
# I don't care about the order of the elements of this list.
expect_equal(actual, list(c(2, 2, 2), 3))
# Don't match character vectors
expr = quote(paste("x", "y"))
expect_equal(find_var(expr, "y"), list())
expr = parse(text = '
d = read.csv("data.csv")
hist(d[, 2])
')
actual = find_var(expr, "read.csv")
expect_equal(actual, list(c(1, 3, 1)))
expr = parse(text = '
f = function(end, start = x) area(sin, start, end)
f(x)
')
# expr[[c(1, 3, 2, 2)]] = as.symbol("z")
# TODO: Running the above results in `expr` still printing `x`, but
# code evaluates as if it were changed to `z`.
# I don't know what's happening.
actual = find_var(expr, "x")
expect_equal(actual, list(c(1, 3, 2, 2), c(2, 2)))
})
test_that("find_call", {
e0 = quote(sapply(x, f))
expect_equal(find_call(e0, "lapply"), list())
e1 = quote(lapply(x, f))
expect_equal(find_call(e1, "lapply"), list(1L))
e2 = quote(y <- lapply(x, f))
expect_equal(find_call(e2, "lapply"), list(c(3L, 1L)))
e3 = quote(y <- c(lapply(x, f1), lapply(x, f2)))
expect_equal(find_call(e3, "lapply"), list(c(3L, 2L, 1L), c(3L, 3L, 1L)))
e4 = quote(y <- lapply(lapply(x, f), g))
expect_equal(find_call(e4, "lapply"), list(c(3L, 1L), c(3L, 2L, 1L)))
})
test_that("tree methods", {
tree = list(list(list(1, 2, 3), 4), 5)
actual = tree[[c(1, 1, 2)]]
expect_equal(actual, 2)
})
test_that("symbol replacement", {
e = parse(text = "
bar = FOO
BAZ
", keep.source = FALSE)
actual = substitute_language(e, list(FOO = quote(foo_new), BAZ = quote(f(g(foo_new)))))
expected = parse(text = "
bar = foo_new
f(g(foo_new))
", keep.source = FALSE)
expect_equal(actual, expected)
e2 = parse(text = "
`_BODY`
foo(bar)
", keep.source = FALSE)
actual = substitute_language(e2, list(`_BODY` = e))
expected = parse(text = "
{
bar = FOO
BAZ
}
foo(bar)
", keep.source = FALSE)
expect_equal(actual, expected)
})
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.