48 lines
1.3 KiB
Rust
48 lines
1.3 KiB
Rust
//! Tests for spawner functionality
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use crate::common::task_fn;
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use dagx::{DagResult, DagRunner};
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use std::sync::atomic::{AtomicUsize, Ordering};
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use std::sync::Arc;
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#[tokio::test]
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async fn test_spawner_actually_spawns_tasks() -> DagResult<()> {
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// Verify that the spawner function is actually called for each task
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let dag = DagRunner::new();
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let spawn_count = Arc::new(AtomicUsize::new(0));
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// Create 10 independent tasks
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let tasks: Vec<_> = (0..10)
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.map(|i| {
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dag.add_task(task_fn::<(), _, _>({
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let value = spawn_count.clone();
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move |_: ()| {
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let value = value.clone();
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value.fetch_add(1, Ordering::SeqCst);
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i
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}
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}))
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})
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.collect();
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// Custom spawner that counts invocations
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dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() })
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.await?;
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// Verify all tasks were spawned
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for (i, task) in tasks.into_iter().enumerate() {
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assert_eq!(dag.get(task)?, i as i32);
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}
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// The spawner should have been called once for each task
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let spawns = spawn_count.load(Ordering::SeqCst);
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assert_eq!(
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spawns, 10,
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"Expected spawner to be called 10 times, but was called {} times",
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spawns
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);
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Ok(())
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}
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