library(testit)
assert(
'find_globals() identifies global variables',
# nothing from outside environment
identical(find_globals('x=1'), character(0)),
# qwer must be created outside somewhere
identical(find_globals('a=1; b=a; d=qwer'), 'qwer'),
identical(find_globals('a=function(){f=2;g}'), 'g'),
# y was assigned locally in z, but there is another y outside from nowhere
identical(find_globals('z=function(){y=1};y'), 'y'),
# more complicated cases: operators, subscripts, ...
identical(find_globals(c('a=1%*%1%o%2 %in% d', 'b=d%%10+3%/%2-z[1:3]')), c('d', 'z'))
)
knit_lazy = function(lazy = TRUE) {
in_dir(tempdir(), {
txt = c(sprintf('```{r test, cache=TRUE, cache.lazy=%s}', lazy),
'x1 = Sys.time()', '```')
knit(text = txt, quiet = TRUE)
x2 = x1
Sys.sleep(0.1)
knit(text = txt, quiet = TRUE)
x1 == x2 # x1 should not be updated
})
}
assert(
'cache.lazy = TRUE/FALSE works',
knit_lazy(TRUE), knit_lazy(FALSE)
)
knit_code$set(a = 1, b = 2, c = 3)
assert(
'dep_prev() sets dependencies on previous chunks',
# dependency is empty now
identical(dep_list$get(), list()),
# b/c depend on a, c depends on b
identical({dep_prev(); dep_list$get()}, list(a = c('b', 'c'), b = 'c'))
)
dep_list$restore()
knit_code$restore()
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