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test_that("single process", {
px <- get_tool("px")
p <- process$new(px, c("sleep", "1", "outln", "foo", "outln", "bar"),
stdout = "|")
on.exit(p$kill(), add = TRUE)
## Timeout
expect_equal(
poll(list(p), 0),
list(c(output = "timeout", error = "nopipe", process = "nopipe"))
)
p$wait()
expect_equal(
poll(list(p), -1),
list(c(output = "ready", error = "nopipe", process = "nopipe"))
)
p$read_output_lines()
expect_equal(
poll(list(p), -1),
list(c(output = "ready", error = "nopipe", process = "nopipe"))
)
p$kill(close_connections = FALSE)
expect_equal(
poll(list(p), -1),
list(c(output = "ready", error = "nopipe", process = "nopipe"))
)
close(p$get_output_connection())
expect_equal(
poll(list(p), -1),
list(c(output = "closed", error = "nopipe", process = "nopipe"))
)
})
test_that("multiple processes", {
px <- get_tool("px")
cmd1 <- c("sleep", "1", "outln", "foo", "outln", "bar")
cmd2 <- c("sleep", "2", "errln", "foo", "errln", "bar")
p1 <- process$new(px, cmd1, stdout = "|")
p2 <- process$new(px, cmd2, stderr = "|")
## Timeout
res <- poll(list(p1 = p1, p2 = p2), 0)
expect_equal(
res,
list(
p1 = c(output = "timeout", error = "nopipe", process = "nopipe"),
p2 = c(output = "nopipe", error = "timeout", process = "nopipe")
)
)
p1$wait()
res <- poll(list(p1 = p1, p2 = p2), -1)
expect_equal(res$p1, c(output = "ready", error = "nopipe", process = "nopipe"))
expect_equal(res$p2[["output"]], "nopipe")
expect_true(res$p2[["error"]] %in% c("silent", "ready"))
close(p1$get_output_connection())
p2$wait()
res <- poll(list(p1 = p1, p2 = p2), -1)
expect_equal(
res,
list(
p1 = c(output = "closed", error = "nopipe", process = "nopipe"),
p2 = c(output = "nopipe", error = "ready", process = "nopipe")
)
)
close(p2$get_error_connection())
res <- poll(list(p1 = p1, p2 = p2), 0)
expect_equal(
res,
list(
p1 = c(output = "closed", error = "nopipe", process = "nopipe"),
p2 = c(output = "nopipe", error = "closed", process = "nopipe")
)
)
})
test_that("multiple polls", {
px <- get_tool("px")
cmd <- c("sleep", "1", "outln", "foo", "sleep", "1", "outln", "bar")
p <- process$new(px, cmd, stdout = "|", stderr = "|")
on.exit(p$kill(), add = TRUE)
out <- character()
while (p$is_alive()) {
poll(list(p), 2000)
out <- c(out, p$read_output_lines())
}
expect_identical(out, c("foo", "bar"))
})
test_that("polling and buffering", {
skip_on_os("windows")
px <- get_tool("px")
for (i in 1:10) {
## We set up two processes, one produces a output, that we do not
## read out from the cache. The other one does not produce output.
p1 <- process$new(px, c(rbind("outln", 1:20), "sleep", "3"), stdout = "|", stderr = "|")
p2 <- process$new(px, c("sleep", "3"), stdout = "|", stderr = "|")
## We poll until p1 has output. We read out some of the output,
## and leave the rest in the buffer.
tick <- Sys.time()
p1$poll_io(-1)
expect_true(Sys.time() - tick < as.difftime(1, units = "secs"))
expect_equal(p1$read_output_lines(n = 1), "1")
## Now poll should return immediately, because there is output ready
## from p1. The status of p2 should be 'silent' (and not 'timeout')
tick <- Sys.time()
s <- poll(list(p1, p2), 3000)
dt <- Sys.time() - tick
expect_true(dt < as.difftime(2, units = "secs"))
expect_equal(
s,
list(
c(output = "ready", error = "silent", process = "nopipe"),
c(output = "silent", error = "silent", process = "nopipe")
)
)
p1$kill()
p2$kill()
if (s[[2]][1] != "silent") break;
}
})
test_that("polling and buffering #2", {
px <- get_tool("px")
## We run this a bunch of times, because it used to fail
## non-deterministically on the CI
for (i in 1:10) {
## Two processes, they both produce output. For the first process,
## we make sure that there is something in the buffer.
## For the second process we need to poll, but data should be
## available immediately.
p1 <- process$new(px, rbind("outln", 1:20), stdout = "|")
p2 <- process$new(px, rbind("outln", 21:30), stdout = "|")
## We poll until p1 has output. We read out some of the output,
## and leave the rest in the buffer.
p1$poll_io(-1)
expect_equal(p1$read_output_lines(n = 1), "1")
## We also need to poll p2, to make sure that there is
## output from it. But we don't read anything from it.
expect_equal(p1$poll_io(-1)[["output"]], "ready")
expect_equal(p2$poll_io(-1)[["output"]], "ready")
## Now poll should return ready for both processes, and it should
## return fast.
tick <- Sys.time()
s <- poll(list(p1, p2), 3000)
expect_equal(
s,
list(
c(output = "ready", error = "nopipe", process = "nopipe"),
c(output = "ready", error = "nopipe", process = "nopipe")
)
)
p1$kill()
p2$kill()
## Check that poll has returned immediately
expect_true(Sys.time() - tick < as.difftime(2, units = "secs"))
}
})
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