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source("incl/start.R")
options(progressr.clear = TRUE)
delay <- getOption("progressr.demo.delay", 0.1)
message("- delay: ", delay, " seconds")
handlers("txtprogressbar")
handlers <- supported_progress_handlers()
message("with_progress() - standard output, messages, warnings ...")
n <- 5L
for (kk in seq_along(handlers)) {
handler <- handlers[[kk]]
name <- names(handlers)[kk]
message(sprintf("* Handler %d ('%s') of %d ...", kk, name, length(handlers)))
for (type in c("message", "warning")) {
message(sprintf(" - stdout + %ss", type))
for (delta in c(0L, +1L, -1L)) {
message(sprintf(" - delta = %+d", delta))
truth <- c()
relay <- record_relay({
with_progress({
p <- progressor(n)
for (ii in seq_len(n + delta)) {
## Zero-amount progress with empty message
p(amount = 0)
msg <- sprintf("ii = %d", ii)
## Zero-amount progress with non-empty message
p(message = msg, amount = 0)
truth <<- c(truth, msg)
cat(msg, "\n", sep = "")
## Signal condition
do.call(type, args = list(msg))
Sys.sleep(delay)
## One-step progress with non-empty message
p(message = sprintf("(%s)", paste(letters[1:ii], collapse=",")))
}
})
}, classes = type)
stopifnot(
identical(relay$stdout, truth),
identical(gsub("\n$", "", relay$msgs), truth)
)
} ## for (delta ...)
} ## for (signal ...)
message(sprintf("* Handler %d ('%s') of %d ... done", kk, name, length(handlers)))
}
message("with_progress() - standard output, messages, warnings ... done")
source("incl/end.R")
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