119 lines
3.6 KiB
Rust
119 lines
3.6 KiB
Rust
//! Tests for single dependencies and basic dependency data flow
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use crate::common::task_fn;
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use dagx::{DagResult, DagRunner, TaskHandle};
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#[tokio::test]
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async fn test_single_dependency() -> DagResult<()> {
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let dag = DagRunner::new();
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let source = dag.add_task(task_fn::<(), _, _>(|_: ()| 42));
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let dependent = dag
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.add_task(task_fn::<i32, _, _>(|&x: &i32| x + 1))
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.depends_on(source);
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dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() }).await?;
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assert_eq!(dag.get(dependent)?, 43);
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Ok(())
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}
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#[tokio::test]
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async fn test_dependency_data_flow() -> DagResult<()> {
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// Test that data flows correctly through dependencies
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let dag = DagRunner::new();
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let source: TaskHandle<_> = dag
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.add_task(task_fn::<(), _, _>(|_: ()| vec![1, 2, 3, 4, 5]))
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.into();
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let sum = dag
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.add_task(task_fn::<Vec<_>, _, _>(|v: &Vec<i32>| {
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v.iter().sum::<i32>()
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}))
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.depends_on(source);
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let product = dag
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.add_task(task_fn::<Vec<_>, _, _>(|v: &Vec<i32>| {
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v.iter().product::<i32>()
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}))
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.depends_on(source);
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let final_result = dag
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.add_task(task_fn::<(i32, i32), _, _>(|(s, p): (&i32, &i32)| s + p))
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.depends_on((&sum, &product));
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dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() }).await?;
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// Note: sum and product are not sinks (final_result depends on them)
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// Only final_result is a sink and can be retrieved
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assert_eq!(dag.get(final_result)?, 135); // 15+120
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Ok(())
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}
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#[tokio::test]
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async fn test_dependencies_with_different_types() -> DagResult<()> {
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// Test that dependencies with different types work correctly
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let dag = DagRunner::new();
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let int_source = dag.add_task(task_fn::<(), _, _>(|_: ()| 42));
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let string_source = dag.add_task(task_fn::<(), _, _>(|_: ()| "hello".to_string()));
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let bool_source = dag.add_task(task_fn::<(), _, _>(|_: ()| true));
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let combined = dag
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.add_task(task_fn::<(i32, String, bool), _, _>(
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|(i, s, b): (&i32, &String, &bool)| format!("{}: {} ({})", s, i, b),
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))
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.depends_on((int_source, string_source, bool_source));
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dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() }).await?;
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assert_eq!(dag.get(combined)?, "hello: 42 (true)");
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Ok(())
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}
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#[tokio::test]
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async fn test_shared_dependencies() -> DagResult<()> {
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// Test that a single node can be a dependency for multiple downstream nodes
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let dag = DagRunner::new();
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let shared: TaskHandle<_> = dag.add_task(task_fn::<(), _, _>(|_: ()| 42)).into();
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// Create 10 tasks that all depend on the shared node
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let dependents: Vec<_> = (0..10)
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.map(|i| {
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dag.add_task(task_fn::<i32, _, _>(move |&x: &i32| x * (i + 1)))
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.depends_on(shared)
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})
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.collect();
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dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() }).await?;
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// Verify all dependents got the correct value from shared
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for (i, handle) in dependents.iter().enumerate() {
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assert_eq!(dag.get(handle)?, 42 * (i as i32 + 1));
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}
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Ok(())
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}
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#[tokio::test]
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async fn test_multiple_source_nodes() -> DagResult<()> {
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// Test DAG with multiple source nodes (no dependencies)
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let dag = DagRunner::new();
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let sources: Vec<_> = (0..20)
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.map(|i| dag.add_task(task_fn::<(), _, _>(move |_: ()| i * 10)))
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.collect();
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dag.run(|fut| async move { tokio::spawn(fut).await.unwrap() }).await?;
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for (i, source) in sources.into_iter().enumerate() {
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assert_eq!(dag.get(source)?, i as i32 * 10);
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}
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Ok(())
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}
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