/
framework.rs
207 lines (165 loc) · 5.4 KB
/
framework.rs
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//! Framework tests
//!
//! The tests in this module are here to verify the testing framework itself.
//! As such, some of these tests may be repeated elsewhere (where we wish to
//! actually test the functionality of `console-subscriber`) and others are
//! negative tests that should panic.
use std::time::Duration;
use futures::future;
use tokio::{task, time::sleep};
mod support;
use support::{assert_task, assert_tasks, ExpectedTask};
#[test]
fn expect_present() {
let expected_task = ExpectedTask::default()
.match_default_name()
.expect_present();
let future = future::ready(());
assert_task(expected_task, future);
}
#[test]
#[should_panic(expected = "Test failed: Task validation failed:
- Task { name=console-test::main }: no expectations set, if you want to just expect that a matching task is present, use `expect_present()`
")]
fn fail_no_expectations() {
let expected_task = ExpectedTask::default().match_default_name();
let future = future::ready(());
assert_task(expected_task, future);
}
#[test]
fn wakes() {
let expected_task = ExpectedTask::default().match_default_name().expect_wakes(1);
let future = async { yield_to_runtime().await };
assert_task(expected_task, future);
}
#[test]
#[should_panic(expected = "Test failed: Task validation failed:
- Task { name=console-test::main }: expected `wakes` to be 5, but actual was 1
")]
fn fail_wakes() {
let expected_task = ExpectedTask::default().match_default_name().expect_wakes(5);
let future = async { yield_to_runtime().await };
assert_task(expected_task, future);
}
#[test]
fn self_wakes() {
let expected_task = ExpectedTask::default()
.match_default_name()
.expect_self_wakes(1);
let future = async { support::self_wake().await };
assert_task(expected_task, future);
}
#[test]
#[should_panic(expected = "Test failed: Task validation failed:
- Task { name=console-test::main }: expected `self_wakes` to be 1, but actual was 0
")]
fn fail_self_wake() {
let expected_task = ExpectedTask::default()
.match_default_name()
.expect_self_wakes(1);
let future = async {
// `sleep` doesn't result in a self wake
sleep(Duration::ZERO).await;
};
assert_task(expected_task, future);
}
#[test]
fn test_spawned_task() {
let expected_task = ExpectedTask::default()
.match_name("another-name".into())
.expect_present();
let future = async {
task::Builder::new()
.name("another-name")
.spawn(async { yield_to_runtime().await })
};
assert_task(expected_task, future);
}
#[test]
#[should_panic(expected = "Test failed: Task validation failed:
- Task { name=wrong-name }: no matching actual task was found
")]
fn fail_wrong_task_name() {
let expected_task = ExpectedTask::default().match_name("wrong-name".into());
let future = async { yield_to_runtime().await };
assert_task(expected_task, future);
}
#[test]
fn multiple_tasks() {
let expected_tasks = vec![
ExpectedTask::default()
.match_name("task-1".into())
.expect_wakes(1),
ExpectedTask::default()
.match_name("task-2".into())
.expect_wakes(1),
];
let future = async {
let task1 = task::Builder::new()
.name("task-1")
.spawn(async { yield_to_runtime().await })
.unwrap();
let task2 = task::Builder::new()
.name("task-2")
.spawn(async { yield_to_runtime().await })
.unwrap();
tokio::try_join! {
task1,
task2,
}
.unwrap();
};
assert_tasks(expected_tasks, future);
}
#[test]
#[should_panic(expected = "Test failed: Task validation failed:
- Task { name=task-2 }: expected `wakes` to be 2, but actual was 1
")]
fn fail_1_of_2_expected_tasks() {
let expected_tasks = vec![
ExpectedTask::default()
.match_name("task-1".into())
.expect_wakes(1),
ExpectedTask::default()
.match_name("task-2".into())
.expect_wakes(2),
];
let future = async {
let task1 = task::Builder::new()
.name("task-1")
.spawn(async { yield_to_runtime().await })
.unwrap();
let task2 = task::Builder::new()
.name("task-2")
.spawn(async { yield_to_runtime().await })
.unwrap();
tokio::try_join! {
task1,
task2,
}
.unwrap();
};
assert_tasks(expected_tasks, future);
}
#[test]
fn polls() {
let expected_task = ExpectedTask::default().match_default_name().expect_polls(2);
let future = async { yield_to_runtime().await };
assert_task(expected_task, future);
}
#[test]
#[should_panic(expected = "Test failed: Task validation failed:
- Task { name=console-test::main }: expected `polls` to be 2, but actual was 1
")]
fn fail_polls() {
let expected_task = ExpectedTask::default().match_default_name().expect_polls(2);
let future = async {};
assert_task(expected_task, future);
}
async fn yield_to_runtime() {
// There is a race condition that can occur when tests are run in parallel,
// caused by tokio-rs/tracing#2743. It tends to cause test failures only
// when the test relies on a wake coming from `tokio::task::yield_now()`.
// For this reason, we prefer a zero-duration sleep.
sleep(Duration::ZERO).await;
}