streamweave 0.10.1

Composable, async, stream-first computation in pure Rust
Documentation 
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//! Tests for StringConcatNode

use crate::node::{InputStreams, Node};
use crate::nodes::string::StringConcatNode;
use std::any::Any;
use std::collections::HashMap;
use std::sync::Arc;
use tokio::sync::mpsc;
use tokio_stream::{StreamExt, wrappers::ReceiverStream};

type AnySender = mpsc::Sender<Arc<dyn Any + Send + Sync>>;

/// Helper to create input streams from channels
fn create_input_streams() -> (AnySender, AnySender, AnySender, InputStreams) {
  let (config_tx, config_rx) = mpsc::channel(10);
  let (in1_tx, in1_rx) = mpsc::channel(10);
  let (in2_tx, in2_rx) = mpsc::channel(10);

  let mut inputs = HashMap::new();
  inputs.insert(
    "configuration".to_string(),
    Box::pin(ReceiverStream::new(config_rx)) as crate::node::InputStream,
  );
  inputs.insert(
    "in1".to_string(),
    Box::pin(ReceiverStream::new(in1_rx)) as crate::node::InputStream,
  );
  inputs.insert(
    "in2".to_string(),
    Box::pin(ReceiverStream::new(in2_rx)) as crate::node::InputStream,
  );

  (config_tx, in1_tx, in2_tx, inputs)
}

#[tokio::test]
async fn test_string_concat_node_creation() {
  let node = StringConcatNode::new("test_concat".to_string());
  assert_eq!(node.name(), "test_concat");
  assert!(node.has_input_port("configuration"));
  assert!(node.has_input_port("in1"));
  assert!(node.has_input_port("in2"));
  assert!(node.has_output_port("out"));
  assert!(node.has_output_port("error"));
}

#[tokio::test]
async fn test_string_concat_basic() {
  let node = StringConcatNode::new("test_concat".to_string());

  let (_config_tx, in1_tx, in2_tx, inputs) = create_input_streams();
  let outputs_future = node.execute(inputs);
  let mut outputs = outputs_future.await.unwrap();

  // Send values: "Hello" + "World" = "HelloWorld"
  let _ = in1_tx
    .send(Arc::new("Hello".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;
  let _ = in2_tx
    .send(Arc::new("World".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;

  // Collect results
  let out_stream = outputs.remove("out").unwrap();
  let mut results = Vec::new();
  let mut stream = out_stream;
  let timeout = tokio::time::sleep(tokio::time::Duration::from_millis(200));
  tokio::pin!(timeout);

  loop {
    tokio::select! {
      result = stream.next() => {
        if let Some(item) = result {
          if let Ok(arc_str) = item.downcast::<String>() {
            results.push(arc_str.clone());
            break;
          }
        } else {
          break;
        }
      }
      _ = &mut timeout => break,
    }
  }

  assert_eq!(results.len(), 1);
  assert_eq!(*results[0], "HelloWorld");
}

#[tokio::test]
async fn test_string_concat_empty_strings() {
  let node = StringConcatNode::new("test_concat".to_string());

  let (_config_tx, in1_tx, in2_tx, inputs) = create_input_streams();
  let outputs_future = node.execute(inputs);
  let mut outputs = outputs_future.await.unwrap();

  // Send empty strings
  let _ = in1_tx
    .send(Arc::new("".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;
  let _ = in2_tx
    .send(Arc::new("".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;

  let out_stream = outputs.remove("out").unwrap();
  let mut results = Vec::new();
  let mut stream = out_stream;
  let timeout = tokio::time::sleep(tokio::time::Duration::from_millis(200));
  tokio::pin!(timeout);

  loop {
    tokio::select! {
      result = stream.next() => {
        if let Some(item) = result {
          if let Ok(arc_str) = item.downcast::<String>() {
            results.push(arc_str.clone());
            break;
          }
        } else {
          break;
        }
      }
      _ = &mut timeout => break,
    }
  }

  assert_eq!(results.len(), 1);
  assert_eq!(*results[0], "");
}

#[tokio::test]
async fn test_string_concat_with_spaces() {
  let node = StringConcatNode::new("test_concat".to_string());

  let (_config_tx, in1_tx, in2_tx, inputs) = create_input_streams();
  let outputs_future = node.execute(inputs);
  let mut outputs = outputs_future.await.unwrap();

  // Send values with spaces
  let _ = in1_tx
    .send(Arc::new("Hello ".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;
  let _ = in2_tx
    .send(Arc::new("World".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;

  let out_stream = outputs.remove("out").unwrap();
  let mut results = Vec::new();
  let mut stream = out_stream;
  let timeout = tokio::time::sleep(tokio::time::Duration::from_millis(200));
  tokio::pin!(timeout);

  loop {
    tokio::select! {
      result = stream.next() => {
        if let Some(item) = result {
          if let Ok(arc_str) = item.downcast::<String>() {
            results.push(arc_str.clone());
            break;
          }
        } else {
          break;
        }
      }
      _ = &mut timeout => break,
    }
  }

  assert_eq!(results.len(), 1);
  assert_eq!(*results[0], "Hello World");
}

#[tokio::test]
async fn test_string_concat_non_string_input() {
  let node = StringConcatNode::new("test_concat".to_string());

  let (_config_tx, in1_tx, in2_tx, inputs) = create_input_streams();
  let outputs_future = node.execute(inputs);
  let mut outputs = outputs_future.await.unwrap();

  // Send non-string input
  let _ = in1_tx
    .send(Arc::new("Hello".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;
  let _ = in2_tx
    .send(Arc::new(42i32) as Arc<dyn Any + Send + Sync>)
    .await;

  let error_stream = outputs.remove("error").unwrap();
  let mut errors = Vec::new();
  let mut stream = error_stream;
  let timeout = tokio::time::sleep(tokio::time::Duration::from_millis(200));
  tokio::pin!(timeout);

  loop {
    tokio::select! {
      result = stream.next() => {
        if let Some(item) = result {
          if let Ok(arc_str) = item.downcast::<String>() {
            errors.push(arc_str.clone());
            break;
          }
        } else {
          break;
        }
      }
      _ = &mut timeout => break,
    }
  }

  assert_eq!(errors.len(), 1);
  assert!(errors[0].contains("Unsupported types for string concatenation"));
}

#[tokio::test]
async fn test_string_concat_multiple_pairs() {
  let node = StringConcatNode::new("test_concat".to_string());

  let (_config_tx, in1_tx, in2_tx, inputs) = create_input_streams();
  let outputs_future = node.execute(inputs);
  let mut outputs = outputs_future.await.unwrap();

  // Send multiple pairs
  let _ = in1_tx
    .send(Arc::new("A".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;
  let _ = in2_tx
    .send(Arc::new("B".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;

  let _ = in1_tx
    .send(Arc::new("C".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;
  let _ = in2_tx
    .send(Arc::new("D".to_string()) as Arc<dyn Any + Send + Sync>)
    .await;

  let out_stream = outputs.remove("out").unwrap();
  let mut results = Vec::new();
  let mut stream = out_stream;
  let timeout = tokio::time::sleep(tokio::time::Duration::from_millis(500));
  tokio::pin!(timeout);

  loop {
    tokio::select! {
      result = stream.next() => {
        if let Some(item) = result {
          if let Ok(arc_str) = item.downcast::<String>() {
            results.push(arc_str.clone());
            if results.len() >= 2 {
              break;
            }
          }
        } else {
          break;
        }
      }
      _ = &mut timeout => break,
    }
  }

  assert_eq!(results.len(), 2);
  assert_eq!(*results[0], "AB");
  assert_eq!(*results[1], "CD");
}