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context("Promise domains")
source("common.R")
describe("Promise domains", {
it("are reentered during handlers", {
cd <- create_counting_domain(trackFinally = TRUE)
p <- with_promise_domain(cd, {
promise_resolve(TRUE) %...>% {
expect_identical(cd$counts$onFulfilledCalled, 1L)
expect_identical(cd$counts$onFulfilledActive, 1L)
10 # sync result
} %...>% {
expect_identical(cd$counts$onFulfilledCalled, 2L)
expect_identical(cd$counts$onFulfilledActive, 1L)
promise_resolve(20) # async result
}
})
expect_identical(cd$counts$onFulfilledBound, 2L)
p <- p %...>% {
expect_identical(cd$counts$onFulfilledCalled, 2L)
expect_identical(cd$counts$onFulfilledActive, 0L)
}
expect_identical(cd$counts$onFulfilledBound, 2L)
with_promise_domain(cd, {
p <- p %>% finally(~{
expect_identical(cd$counts$onFinallyCalled, 1L)
expect_identical(cd$counts$onFinallyActive, 1L)
})
expect_identical(cd$counts$onFinallyBound, 1L)
expect_identical(cd$counts$onFulfilledBound, 2L)
expect_identical(cd$counts$onRejectedBound, 0L)
wait_for_it()
})
expect_identical(cd$counts$onFulfilledBound, 2L)
with_promise_domain(cd, {
p <- p %...>% {
expect_identical(cd$counts$onFulfilledCalled, 3L)
# This tests if promise domain membership infects subscriptions made
# in handlers.
p %...>% {
expect_true(!is.null(current_promise_domain()))
expect_identical(cd$counts$onFulfilledCalled, 4L)
}
}
})
expect_true(is.null(current_promise_domain()))
expect_identical(cd$counts$onFulfilledCalled, 2L)
wait_for_it()
})
it("pass finally binding to fulfill/reject by default", {
cd1 <- create_counting_domain(trackFinally = FALSE)
with_promise_domain(cd1, {
p1 <- promise_resolve(TRUE) %>%
finally(~{
expect_identical(cd1$counts$onFulfilledActive, 1L)
expect_identical(cd1$counts$onRejectedActive, 0L)
})
expect_identical(cd1$counts$onFulfilledBound, 1L)
expect_identical(cd1$counts$onRejectedBound, 1L)
wait_for_it()
expect_identical(cd1$counts$onFulfilledCalled, 1L)
expect_identical(cd1$counts$onRejectedCalled, 0L)
})
cd2 <- create_counting_domain(trackFinally = FALSE)
with_promise_domain(cd2, {
p1 <- promise_reject("a problem") %>%
finally(~{
expect_identical(cd2$counts$onFulfilledActive, 0L)
expect_identical(cd2$counts$onRejectedActive, 1L)
})
p1
}) %>% squelch_unhandled_promise_error()
expect_identical(cd2$counts$onFulfilledBound, 1L)
expect_identical(cd2$counts$onRejectedBound, 1L)
wait_for_it()
expect_identical(cd2$counts$onFulfilledCalled, 0L)
expect_identical(cd2$counts$onRejectedCalled, 1L)
})
it("doesn't intercept fulfill/reject on finally, if finally is explicitly intercepted", {
cd1 <- create_counting_domain(trackFinally = TRUE)
with_promise_domain(cd1, {
p1 <- promise_resolve(TRUE) %>%
finally(~{
expect_identical(cd1$counts$onFinallyActive, 1L)
expect_identical(cd1$counts$onFulfilledActive, 0L)
expect_identical(cd1$counts$onRejectedActive, 0L)
})
expect_identical(cd1$counts$onFinallyBound, 1L)
expect_identical(cd1$counts$onFulfilledBound, 0L)
expect_identical(cd1$counts$onRejectedBound, 0L)
wait_for_it()
expect_identical(cd1$counts$onFinallyCalled, 1L)
expect_identical(cd1$counts$onFulfilledCalled, 0L)
expect_identical(cd1$counts$onRejectedCalled, 0L)
})
cd2 <- create_counting_domain(trackFinally = TRUE)
with_promise_domain(cd2, {
p2 <- promise_reject(TRUE) %>%
finally(~{
expect_identical(cd2$counts$onFinallyActive, 1L)
expect_identical(cd2$counts$onFulfilledActive, 0L)
expect_identical(cd2$counts$onRejectedActive, 0L)
})
p2
}) %>% squelch_unhandled_promise_error()
expect_identical(cd2$counts$onFinallyBound, 1L)
expect_identical(cd2$counts$onFulfilledBound, 0L)
expect_identical(cd2$counts$onRejectedBound, 0L)
wait_for_it()
expect_identical(cd2$counts$onFinallyCalled, 1L)
expect_identical(cd2$counts$onFulfilledCalled, 0L)
expect_identical(cd2$counts$onRejectedCalled, 0L)
})
})
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