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use tokio_stream::StreamExt;
use crate::reasoning::{Reasoning, ReasoningFull};
use crate::{
ArcSender, ChatCompletionMessage, ChatCompletionMessageFull, ChatResponse, ChatResponseContent,
FinishReason, ToolCallFull, ToolCallPart, Usage,
};
/// Extension trait for ResultStream to provide additional functionality
#[async_trait::async_trait]
pub trait ResultStreamExt<E> {
/// Collects all messages from the stream into a single
/// ChatCompletionMessageFull
///
/// # Arguments
/// * `should_interrupt_for_xml` - Whether to interrupt the stream when XML
/// tool calls are detected
///
/// # Returns
/// A ChatCompletionMessageFull containing the aggregated content, tool
/// calls, and usage information
async fn into_full(
self,
should_interrupt_for_xml: bool,
) -> Result<ChatCompletionMessageFull, E>;
/// Collects all messages from the stream into a single
/// ChatCompletionMessageFull while streaming content deltas to the sender.
///
/// # Arguments
/// * `should_interrupt_for_xml` - Whether to interrupt the stream when XML
/// tool calls are detected
/// * `sender` - Optional sender to stream content and reasoning deltas to
///
/// # Returns
/// A ChatCompletionMessageFull containing the aggregated content, tool
/// calls, and usage information
async fn into_full_streaming(
self,
should_interrupt_for_xml: bool,
sender: Option<ArcSender>,
) -> Result<ChatCompletionMessageFull, E>;
}
#[async_trait::async_trait]
impl ResultStreamExt<anyhow::Error> for crate::BoxStream<ChatCompletionMessage, anyhow::Error> {
async fn into_full(
self,
should_interrupt_for_xml: bool,
) -> anyhow::Result<ChatCompletionMessageFull> {
self.into_full_streaming(should_interrupt_for_xml, None)
.await
}
async fn into_full_streaming(
mut self,
should_interrupt_for_xml: bool,
sender: Option<ArcSender>,
) -> anyhow::Result<ChatCompletionMessageFull> {
let mut messages = Vec::new();
let mut usage: Usage = Default::default();
let mut content = String::new();
let mut xml_tool_calls = None;
let mut tool_interrupted = false;
while let Some(message) = self.next().await {
let message =
anyhow::Ok(message?).with_context(|| "Failed to process message stream")?;
// Process usage information
// - For Anthropic-style streaming: input tokens in MessageStart, output tokens
// in MessageDelta (values are CUMULATIVE, not incremental)
// ref: https://platform.claude.com/docs/en/build-with-claude/streaming#event-types
// - For OpenAI-style streaming: all tokens in the final chunk
// - For GLM-style: may send complete usage in every chunk (need to replace, not
// accumulate)
// - For Google-style: cumulative usage in every chunk
// - Cost-only events: have 0 tokens but a cost value
if let Some(current_usage) = message.usage.as_ref() {
// If current usage has both prompt and completion tokens, it's a "complete"
// usage. In this case, replace instead of merge (handles GLM-style streaming
// where every chunk has full usage).
let is_complete_usage =
*current_usage.prompt_tokens > 0 && *current_usage.completion_tokens > 0;
// Cost-only events have 0 tokens but a cost value
let is_cost_only = *current_usage.prompt_tokens == 0
&& *current_usage.completion_tokens == 0
&& current_usage.cost.is_some();
if is_complete_usage {
// Replace with the latest complete usage, but preserve cost if already set
let existing_cost = usage.cost;
usage = *current_usage;
if usage.cost.is_none() && existing_cost.is_some() {
usage.cost = existing_cost;
}
} else if is_cost_only {
// Accumulate only the cost to the existing usage
usage.cost = match (usage.cost, current_usage.cost) {
(Some(a), Some(b)) => Some(a + b),
(Some(a), None) => Some(a),
(None, Some(b)) => Some(b),
(None, None) => None,
};
} else {
// Merge partial usage using "max" strategy. This correctly handles
// providers like Anthropic where usage values are CUMULATIVE across
// events (message_start has input tokens, message_delta has the
// total output tokens). Using max instead of sum prevents
// double-counting when message_start includes output_tokens=1.
usage = usage.merge(current_usage);
}
}
if !tool_interrupted {
messages.push(message.clone());
// Stream content delta if sender is available
if let Some(ref sender) = sender {
if let Some(reasoning_part) = message.reasoning.as_ref() {
let delta = reasoning_part.as_str();
if !delta.is_empty() {
// Ignore send errors - the receiver may have been dropped
let _ = sender
.send(Ok(ChatResponse::TaskReasoning {
content: delta.to_string(),
}))
.await;
}
}
if let Some(content_part) = message.content.as_ref() {
let delta = content_part.as_str();
if !delta.is_empty() {
// Ignore send errors - the receiver may have been dropped
let _ = sender
.send(Ok(ChatResponse::TaskMessage {
content: ChatResponseContent::Markdown {
text: delta.to_string(),
partial: true,
},
}))
.await;
}
}
}
// Process content
if let Some(content_part) = message.content.as_ref() {
content.push_str(content_part.as_str());
// Check for XML tool calls in the content, but only interrupt if flag is set
if should_interrupt_for_xml {
// Use match instead of ? to avoid propagating errors
if let Some(tool_call) = ToolCallFull::try_from_xml(&content)
.ok()
.into_iter()
.flatten()
.next()
{
xml_tool_calls = Some(tool_call);
tool_interrupted = true;
}
}
}
}
}
// Get the full content from all messages
let mut content = messages
.iter()
.flat_map(|m| m.content.iter())
.map(|content| content.as_str())
.collect::<Vec<_>>()
.join("");
// Collect reasoning tokens from all messages
let reasoning = messages
.iter()
.flat_map(|m| m.reasoning.iter())
.map(|content| content.as_str())
.collect::<Vec<_>>()
.join("");
#[allow(clippy::collapsible_if)]
if tool_interrupted && !content.trim().ends_with("</forge_tool_call>") {
if let Some((i, right)) = content.rmatch_indices("</forge_tool_call>").next() {
content.truncate(i + right.len());
// Add a comment for the assistant to signal interruption
content.push('\n');
content.push_str("<forge_feedback>");
content.push_str(
"Response interrupted by tool result. Use only one tool at the end of the message",
);
content.push_str("</forge_feedback>");
}
}
// Extract all tool calls in a fully declarative way with combined sources
// Start with complete tool calls (for non-streaming mode)
let initial_tool_calls: Vec<ToolCallFull> = messages
.iter()
.flat_map(|message| &message.tool_calls)
.filter_map(|tool_call| tool_call.as_full().cloned())
.collect();
// Get partial tool calls
let tool_call_parts: Vec<ToolCallPart> = messages
.iter()
.flat_map(|message| &message.tool_calls)
.filter_map(|tool_call| tool_call.as_partial().cloned())
.collect();
// Process partial tool calls
// Convert parse failures to retryable errors so they can be retried by asking
// LLM to try again
let partial_tool_calls = ToolCallFull::try_from_parts(&tool_call_parts)
.with_context(|| "Failed to parse tool call".to_string())
.map_err(crate::Error::Retryable)?;
// Combine all sources of tool calls
let tool_calls: Vec<ToolCallFull> = initial_tool_calls
.into_iter()
.chain(partial_tool_calls)
.chain(xml_tool_calls)
.collect();
// Collect reasoning details from all messages
let initial_reasoning_details = messages
.iter()
.filter_map(|message| message.reasoning_details.as_ref())
.flat_map(|details| details.iter().filter_map(|d| d.as_full().cloned()))
.flatten()
.collect::<Vec<_>>();
let partial_reasoning_details = messages
.iter()
.filter_map(|message| message.reasoning_details.as_ref())
.flat_map(|details| details.iter().filter_map(|d| d.as_partial().cloned()))
.collect::<Vec<_>>();
let total_reasoning_details: Vec<ReasoningFull> = initial_reasoning_details
.into_iter()
.chain(Reasoning::from_parts(partial_reasoning_details))
.collect();
// Get the finish reason from the last message that has one
let finish_reason = messages
.iter()
.rev()
.find_map(|message| message.finish_reason.clone());
// Get thought signature from the last message that has one
let thought_signature = messages
.iter()
.rev()
.find_map(|message| message.thought_signature.clone());
// Get phase from the last message that has one
let phase = messages.iter().rev().find_map(|message| message.phase);
// A refusal/content-filter finish is deterministic - the provider
// will return the same result for the same request - so it must not
// enter the retry loop (issue #3624). Tool calls alongside a
// content-filter finish are left to the normal flow.
if finish_reason == Some(FinishReason::ContentFilter) && tool_calls.is_empty() {
return Err(crate::Error::Refusal.into());
}
// Check for empty completion - map to retryable error for retry
if content.trim().is_empty()
&& tool_calls.is_empty()
&& finish_reason.is_none()
&& thought_signature.is_none()
{
return Err(crate::Error::EmptyCompletion.into_retryable().into());
}
Ok(ChatCompletionMessageFull {
content,
thought_signature,
tool_calls,
usage,
reasoning: (!reasoning.is_empty()).then_some(reasoning),
reasoning_details: (!total_reasoning_details.is_empty())
.then_some(total_reasoning_details),
finish_reason,
phase,
})
}
}
#[cfg(test)]
mod tests {
use pretty_assertions::assert_eq;
use super::*;
use crate::{
BoxStream, Content, FinishReason, TokenCount, ToolCall, ToolCallArguments, ToolCallId,
ToolName,
};
#[tokio::test]
async fn test_into_full_basic() {
// Fixture: Create a stream of messages
// OpenAI-style: usage only in the final chunk
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part("Hello "))),
Ok(ChatCompletionMessage::default()
.content(Content::part("world!"))
.usage(Usage {
prompt_tokens: TokenCount::Actual(10),
completion_tokens: TokenCount::Actual(5),
total_tokens: TokenCount::Actual(15),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Combined content and usage from final chunk
let expected = ChatCompletionMessageFull {
content: "Hello world!".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(10), // From final chunk
completion_tokens: TokenCount::Actual(5), // From final chunk
total_tokens: TokenCount::Actual(15), // From final chunk
cached_tokens: TokenCount::Actual(0),
cost: None,
},
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_glm_style_usage_replacement() {
// Fixture: Simulate GLM-style streaming where complete usage is sent in every
// chunk This tests that we replace instead of accumulate to avoid
// multiplying tokens
let messages = vec![
Ok(ChatCompletionMessage::default()
.content(Content::part("Hello "))
.usage(Usage {
prompt_tokens: TokenCount::Actual(100),
completion_tokens: TokenCount::Actual(5),
total_tokens: TokenCount::Actual(105),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
Ok(ChatCompletionMessage::default()
.content(Content::part("world!"))
.usage(Usage {
prompt_tokens: TokenCount::Actual(100),
completion_tokens: TokenCount::Actual(10),
total_tokens: TokenCount::Actual(110),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Usage should be from the last chunk, NOT accumulated
// (accumulating would give prompt_tokens=200, which is wrong)
let expected = ChatCompletionMessageFull {
content: "Hello world!".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(100), // From last chunk, NOT 200
completion_tokens: TokenCount::Actual(10), // From last chunk
total_tokens: TokenCount::Actual(110), // From last chunk, NOT 215
cached_tokens: TokenCount::Actual(0),
cost: None,
},
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_cost_only_event_adds_cost_to_usage() {
// Fixture: Simulate GLM-style streaming with a separate cost event at the end
let messages = vec![
// Content with complete usage
Ok(ChatCompletionMessage::default()
.content(Content::part("Hello world!"))
.usage(Usage {
prompt_tokens: TokenCount::Actual(100),
completion_tokens: TokenCount::Actual(10),
total_tokens: TokenCount::Actual(110),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
// Cost-only event (0 tokens but has cost)
Ok(ChatCompletionMessage::default().usage(Usage {
prompt_tokens: TokenCount::Actual(0),
completion_tokens: TokenCount::Actual(0),
total_tokens: TokenCount::Actual(0),
cached_tokens: TokenCount::Actual(0),
cost: Some(0.005),
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Usage should have tokens from first chunk, cost from cost-only
// event
let expected = ChatCompletionMessageFull {
content: "Hello world!".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(100),
completion_tokens: TokenCount::Actual(10),
total_tokens: TokenCount::Actual(110),
cached_tokens: TokenCount::Actual(0),
cost: Some(0.005), // From cost-only event
},
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_cost_preserved_when_complete_usage_arrives_after_cost_only() {
// Fixture: Cost-only event arrives BEFORE the complete usage event
// (Graphite bug report scenario)
let messages = vec![
// Cost-only event arrives first
Ok(ChatCompletionMessage::default().usage(Usage {
prompt_tokens: TokenCount::Actual(0),
completion_tokens: TokenCount::Actual(0),
total_tokens: TokenCount::Actual(0),
cached_tokens: TokenCount::Actual(0),
cost: Some(0.005),
})),
// Complete usage event arrives after (without cost)
Ok(ChatCompletionMessage::default()
.content(Content::part("Hello world!"))
.usage(Usage {
prompt_tokens: TokenCount::Actual(100),
completion_tokens: TokenCount::Actual(10),
total_tokens: TokenCount::Actual(110),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Cost from cost-only event should NOT be lost when complete usage
// replaces it
let expected = ChatCompletionMessageFull {
content: "Hello world!".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(100),
completion_tokens: TokenCount::Actual(10),
total_tokens: TokenCount::Actual(110),
cached_tokens: TokenCount::Actual(0),
cost: Some(0.005), // Preserved from cost-only event
},
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_anthropic_streaming_usage_merge() {
// Fixture: Simulate Anthropic streaming pattern where message_start has
// output_tokens=1 (the common case) and message_delta has the cumulative total.
// This tests that merge (max) is used instead of accumulate (sum) to prevent
// double-counting.
let messages = vec![
// MessageStart with input token usage AND output_tokens=1
Ok(ChatCompletionMessage::default().usage(Usage {
prompt_tokens: TokenCount::Actual(1000),
completion_tokens: TokenCount::Actual(1),
total_tokens: TokenCount::Actual(1001),
cached_tokens: TokenCount::Actual(300),
cost: None,
})),
// Content deltas
Ok(ChatCompletionMessage::default().content(Content::part("Hello "))),
Ok(ChatCompletionMessage::default().content(Content::part("world!"))),
// MessageDelta with cumulative output token usage
Ok(ChatCompletionMessage::default()
.usage(Usage {
prompt_tokens: TokenCount::Actual(0),
completion_tokens: TokenCount::Actual(50),
total_tokens: TokenCount::Actual(50),
cached_tokens: TokenCount::Actual(0),
cost: None,
})
.finish_reason(FinishReason::Stop)),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Usage should use max (merge) not sum (accumulate).
// message_start has completion_tokens=1 and prompt_tokens=1000, so
// is_complete_usage=true -> replace: usage = {1000, 1, 1001, 300}
// message_delta has prompt=0, completion=50 -> is_complete_usage=false ->
// merge: prompt = max(1000, 0) = 1000
// completion = max(1, 50) = 50 (NOT 1+50=51)
// total = max(1001, 50) = 1001
// cached = max(300, 0) = 300
let expected = ChatCompletionMessageFull {
content: "Hello world!".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(1000),
completion_tokens: TokenCount::Actual(50), // max(1, 50) = 50, NOT 1+50=51
total_tokens: TokenCount::Actual(1001),
cached_tokens: TokenCount::Actual(300),
cost: None,
},
reasoning: None,
reasoning_details: None,
finish_reason: Some(FinishReason::Stop),
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_anthropic_streaming_usage_merge_zero_output() {
// Fixture: Simulate Anthropic/Vertex AI Anthropic streaming pattern
// where message_start has output_tokens=0 (Vertex AI pattern).
// MessageStart event has input tokens, MessageDelta has output tokens
let messages = vec![
// MessageStart with input token usage
Ok(ChatCompletionMessage::default().usage(Usage {
prompt_tokens: TokenCount::Actual(1000),
completion_tokens: TokenCount::Actual(0),
total_tokens: TokenCount::Actual(1000),
cached_tokens: TokenCount::Actual(300),
cost: None,
})),
// Content deltas
Ok(ChatCompletionMessage::default().content(Content::part("Hello "))),
Ok(ChatCompletionMessage::default().content(Content::part("world!"))),
// MessageDelta with output token usage
Ok(ChatCompletionMessage::default()
.usage(Usage {
prompt_tokens: TokenCount::Actual(0),
completion_tokens: TokenCount::Actual(50),
total_tokens: TokenCount::Actual(50),
cached_tokens: TokenCount::Actual(0),
cost: None,
})
.finish_reason(FinishReason::Stop)),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Usage should be merged from both MessageStart and MessageDelta
let expected = ChatCompletionMessageFull {
content: "Hello world!".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(1000), // From MessageStart
completion_tokens: TokenCount::Actual(50), // From MessageDelta
total_tokens: TokenCount::Actual(1000), // max(1000, 50) = 1000
cached_tokens: TokenCount::Actual(300), // From MessageStart
cost: None,
},
reasoning: None,
reasoning_details: None,
finish_reason: Some(FinishReason::Stop),
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_streaming_sends_deltas() {
// Fixture: Create a stream of messages
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part("Hello "))),
Ok(ChatCompletionMessage::default().content(Content::part("world!"))),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Create a channel to receive deltas
let (tx, mut rx) = tokio::sync::mpsc::channel::<anyhow::Result<ChatResponse>>(10);
// Actual: Convert stream to full message with streaming
let actual = result_stream
.into_full_streaming(false, Some(tx))
.await
.unwrap();
// Collect all deltas
let mut deltas = Vec::new();
while let Ok(msg) = rx.try_recv() {
deltas.push(msg.unwrap());
}
// Expected: Two deltas were sent as TaskMessage with Markdown content
assert_eq!(deltas.len(), 2);
assert!(matches!(
&deltas[0],
ChatResponse::TaskMessage { content: ChatResponseContent::Markdown { text, partial: true }, .. } if text == "Hello "
));
assert!(matches!(
&deltas[1],
ChatResponse::TaskMessage { content: ChatResponseContent::Markdown { text, partial: true }, .. } if text == "world!"
));
// Expected: Full content is still correct
assert_eq!(actual.content, "Hello world!");
}
#[tokio::test]
async fn test_into_full_streaming_sends_reasoning_deltas() {
// Fixture: Create a stream of messages with reasoning
let messages = vec![
Ok(ChatCompletionMessage::default()
.content(Content::part("Answer: "))
.reasoning(Content::part("Let me think..."))),
Ok(ChatCompletionMessage::default()
.content(Content::part("42"))
.reasoning(Content::part(" about this."))),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Create a channel to receive deltas
let (tx, mut rx) = tokio::sync::mpsc::channel::<anyhow::Result<ChatResponse>>(10);
// Actual: Convert stream to full message with streaming
let actual = result_stream
.into_full_streaming(false, Some(tx))
.await
.unwrap();
// Collect all deltas
let mut content_deltas = Vec::new();
let mut reasoning_deltas = Vec::new();
while let Ok(msg) = rx.try_recv() {
match msg.unwrap() {
ChatResponse::TaskMessage {
content: ChatResponseContent::Markdown { text, partial: true },
..
} => content_deltas.push(text),
ChatResponse::TaskReasoning { content } => reasoning_deltas.push(content),
_ => {}
}
}
// Expected: Two content deltas and two reasoning deltas
assert_eq!(content_deltas.len(), 2);
assert_eq!(reasoning_deltas.len(), 2);
assert_eq!(content_deltas, vec!["Answer: ", "42"]);
assert_eq!(reasoning_deltas, vec!["Let me think...", " about this."]);
// Expected: Full content and reasoning are correct
assert_eq!(actual.content, "Answer: 42");
assert_eq!(
actual.reasoning,
Some("Let me think... about this.".to_string())
);
}
#[tokio::test]
async fn test_into_full_with_tool_calls() {
// Fixture: Create a stream with tool calls
let tool_call = ToolCallFull {
name: ToolName::new("test_tool"),
call_id: Some(ToolCallId::new("call_123")),
arguments: serde_json::json!("test_arg").into(),
thought_signature: None,
};
let messages = vec![Ok(ChatCompletionMessage::default()
.content(Content::part("Processing..."))
.add_tool_call(ToolCall::Full(tool_call.clone())))];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Content and tool calls
let expected = ChatCompletionMessageFull {
content: "Processing...".to_string(),
tool_calls: vec![tool_call],
thought_signature: None,
usage: Usage::default(),
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_with_tool_call_parse_failure_creates_retryable_error() {
use crate::{ToolCallId, ToolCallPart, ToolName};
// Fixture: Create a stream with invalid tool call JSON
let invalid_tool_call_part = ToolCallPart {
call_id: Some(ToolCallId::new("call_123")),
name: Some(ToolName::new("test_tool")),
arguments_part: "invalid json {".to_string(), // Invalid JSON
thought_signature: None,
};
let messages = vec![Ok(ChatCompletionMessage::default()
.content(Content::part("Processing..."))
.add_tool_call(ToolCall::Part(invalid_tool_call_part)))];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await;
// Expected: Should not fail with invalid tool calls
assert!(actual.is_ok());
let actual = actual.unwrap();
let expected = ToolCallFull {
name: ToolName::new("test_tool"),
call_id: Some(ToolCallId::new("call_123")),
arguments: ToolCallArguments::from_json("invalid json {"),
thought_signature: None,
};
assert_eq!(actual.tool_calls[0], expected);
}
#[tokio::test]
async fn test_into_full_with_reasoning() {
// Fixture: Create a stream with reasoning content across multiple messages
let messages = vec![
Ok(ChatCompletionMessage::default()
.content(Content::part("Hello "))
.reasoning(Content::part("First reasoning: "))),
Ok(ChatCompletionMessage::default()
.content(Content::part("world!"))
.reasoning(Content::part("thinking deeply about this..."))),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Reasoning should be aggregated from all messages
let expected = ChatCompletionMessageFull {
content: "Hello world!".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage::default(),
reasoning: Some("First reasoning: thinking deeply about this...".to_string()),
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_with_reasoning_details() {
use crate::reasoning::{Reasoning, ReasoningFull};
// Fixture: Create a stream with reasoning details
let reasoning_full = vec![ReasoningFull {
text: Some("Deep thought process".to_string()),
signature: Some("signature1".to_string()),
..Default::default()
}];
let reasoning_part = crate::reasoning::ReasoningPart {
text: Some("Partial reasoning".to_string()),
signature: Some("signature2".to_string()),
..Default::default()
};
let messages = vec![
Ok(ChatCompletionMessage::default()
.content(Content::part("Processing..."))
.add_reasoning_detail(Reasoning::Full(reasoning_full.clone()))),
Ok(ChatCompletionMessage::default()
.content(Content::part(" complete"))
.add_reasoning_detail(Reasoning::Part(vec![reasoning_part]))),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Reasoning details should be collected from all messages
let expected_reasoning_details = vec![
reasoning_full[0].clone(),
ReasoningFull {
text: Some("Partial reasoning".to_string()),
signature: Some("signature2".to_string()),
..Default::default()
},
];
let expected = ChatCompletionMessageFull {
content: "Processing... complete".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage::default(),
reasoning: None,
reasoning_details: Some(expected_reasoning_details),
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_with_empty_reasoning() {
// Fixture: Create a stream with empty reasoning
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part("Hello"))),
Ok(ChatCompletionMessage::default()
.content(Content::part(" world"))
.reasoning(Content::part(""))), // Empty reasoning
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Empty reasoning should result in None
let expected = ChatCompletionMessageFull {
content: "Hello world".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage::default(),
reasoning: None, // Empty reasoning should be None
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_xml_tool_call_interruption_captures_final_usage() {
let xml_content = r#"<forge_tool_call>
{"name": "test_tool", "arguments": {"arg": "value"}}
</forge_tool_call>"#;
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part(&xml_content[0..30]))),
Ok(ChatCompletionMessage::default().content(Content::part(&xml_content[30..]))),
// These messages come after tool interruption but contain usage updates
Ok(ChatCompletionMessage::default().content(Content::part(" ignored content"))),
// Final message with the actual usage - this is always sent last
Ok(ChatCompletionMessage::default().usage(Usage {
prompt_tokens: TokenCount::Actual(5),
completion_tokens: TokenCount::Actual(15),
total_tokens: TokenCount::Actual(20),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message with XML interruption enabled
let actual = result_stream.into_full(true).await.unwrap();
// Expected: Should contain the XML tool call and final usage from last message
let expected_final_usage = Usage {
prompt_tokens: TokenCount::Actual(5),
completion_tokens: TokenCount::Actual(15),
total_tokens: TokenCount::Actual(20),
cached_tokens: TokenCount::Actual(0),
cost: None,
};
assert_eq!(actual.usage, expected_final_usage);
assert_eq!(actual.tool_calls.len(), 1);
assert_eq!(actual.tool_calls[0].name.as_str(), "test_tool");
assert_eq!(actual.content, xml_content);
}
#[tokio::test]
async fn test_into_full_xml_tool_call_no_interruption_when_disabled() {
// Fixture: Create a stream with XML tool call content but interruption disabled
let xml_content = r#"<forge_tool_call>
{"name": "test_tool", "arguments": {"arg": "value"}}
</forge_tool_call>"#;
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part(xml_content))),
Ok(ChatCompletionMessage::default()
.content(Content::part(" and more content"))
.usage(Usage {
prompt_tokens: TokenCount::Actual(5),
completion_tokens: TokenCount::Actual(15),
total_tokens: TokenCount::Actual(20),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message with XML interruption disabled
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Should process all content without interruption
let expected = ChatCompletionMessageFull {
content: format!("{xml_content} and more content"),
tool_calls: vec![], /* No XML tool calls should be extracted when interruption is
* disabled */
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(5),
completion_tokens: TokenCount::Actual(15),
total_tokens: TokenCount::Actual(20),
cached_tokens: TokenCount::Actual(0),
cost: None,
},
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_usage_always_from_last_message_even_without_interruption() {
// Fixture: Create a stream where usage progresses through multiple messages
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part("Starting"))),
Ok(ChatCompletionMessage::default().content(Content::part(" processing"))),
Ok(ChatCompletionMessage::default().content(Content::part(" complete"))),
Ok(ChatCompletionMessage::default().usage(Usage {
prompt_tokens: TokenCount::Actual(5),
completion_tokens: TokenCount::Actual(15),
total_tokens: TokenCount::Actual(20),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Usage should be from the last message (even if it has no content)
let expected = ChatCompletionMessageFull {
content: "Starting processing complete".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage {
prompt_tokens: TokenCount::Actual(5),
completion_tokens: TokenCount::Actual(15),
total_tokens: TokenCount::Actual(20),
cached_tokens: TokenCount::Actual(0),
cost: None,
},
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_with_finish_reason() {
use crate::FinishReason;
// Fixture: Create a stream with multiple messages, some with finish reasons
let messages = vec![
Ok(ChatCompletionMessage::default()
.content(Content::part("Processing..."))
.finish_reason_opt(Some(FinishReason::Length))), /* This finish reason should be
* overridden */
Ok(ChatCompletionMessage::default()
.content(Content::part(" continue"))
.finish_reason_opt(None)), // No finish reason
Ok(ChatCompletionMessage::default()
.content(Content::part(" done"))
.finish_reason_opt(Some(FinishReason::Stop))), /* This should be the final
* finish reason */
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Should use the last finish reason from the stream
let expected = ChatCompletionMessageFull {
content: "Processing... continue done".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage::default(),
reasoning: None,
reasoning_details: None,
finish_reason: Some(FinishReason::Stop), /* Should be from the last message with a
* finish reason */
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_with_finish_reason_tool_calls() {
use crate::FinishReason;
// Fixture: Create a stream that ends with a tool call finish reason
let messages = vec![Ok(ChatCompletionMessage::default()
.content(Content::part("I'll call a tool"))
.finish_reason_opt(Some(FinishReason::ToolCalls)))];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Should have the tool_calls finish reason
let expected = ChatCompletionMessageFull {
content: "I'll call a tool".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage::default(),
reasoning: None,
reasoning_details: None,
finish_reason: Some(FinishReason::ToolCalls),
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_with_no_finish_reason() {
// Fixture: Create a stream with no finish reasons
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part("Hello"))),
Ok(ChatCompletionMessage::default().content(Content::part(" world"))),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: finish_reason should be None
let expected = ChatCompletionMessageFull {
content: "Hello world".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage::default(),
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_stream_continues_after_xml_interruption_for_usage_only() {
let xml_content = r#"<forge_tool_call>
{"name": "test_tool", "arguments": {"arg": "value"}}
</forge_tool_call>"#;
let messages = vec![
Ok(ChatCompletionMessage::default().content(Content::part(xml_content))),
// After interruption - content should be ignored but usage should be captured
Ok(ChatCompletionMessage::default()
.content(Content::part("This content should be ignored"))),
Ok(ChatCompletionMessage::default()
.content(Content::part("This too should be ignored"))),
Ok(ChatCompletionMessage::default().usage(Usage {
prompt_tokens: TokenCount::Actual(5),
completion_tokens: TokenCount::Actual(20),
total_tokens: TokenCount::Actual(25),
cached_tokens: TokenCount::Actual(0),
cost: None,
})),
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message with XML interruption enabled
let actual = result_stream.into_full(true).await.unwrap();
// Expected: Should have XML tool call, content only from before interruption,
// but final usage
assert_eq!(actual.content, xml_content);
assert_eq!(actual.tool_calls.len(), 1);
assert_eq!(actual.tool_calls[0].name.as_str(), "test_tool");
assert_eq!(actual.usage.total_tokens, TokenCount::Actual(25));
assert_eq!(actual.usage.completion_tokens, TokenCount::Actual(20));
}
#[tokio::test]
async fn test_into_full_empty_completion_creates_unparsed_tool_calls() {
use crate::Error;
// Fixture: Create a stream with empty content, no tool calls, and no finish
// reason
let messages = vec![
Ok(ChatCompletionMessage::default()), // Completely empty message
Ok(ChatCompletionMessage::default().content(Content::part(""))), // Empty content
Ok(ChatCompletionMessage::default().content(Content::part(" "))), // Whitespace only
];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await;
// Expected: Should return a retryable error for empty completion
assert!(actual.is_err());
let error = actual.unwrap_err();
let domain_error = error.downcast_ref::<Error>();
assert!(domain_error.is_some());
assert!(matches!(domain_error.unwrap(), Error::Retryable(_)));
}
#[tokio::test]
async fn test_into_full_empty_completion_with_finish_reason_should_not_error() {
use crate::FinishReason;
// Fixture: Create a stream with empty content but with finish reason
let messages = vec![Ok(ChatCompletionMessage::default()
.content(Content::part(""))
.finish_reason_opt(Some(FinishReason::Stop)))];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Should succeed because finish reason is present
let expected = ChatCompletionMessageFull {
content: "".to_string(),
tool_calls: vec![],
thought_signature: None,
usage: Usage::default(),
reasoning: None,
reasoning_details: None,
finish_reason: Some(FinishReason::Stop),
phase: None,
};
assert_eq!(actual, expected);
}
#[tokio::test]
async fn test_into_full_refusal_is_non_retryable_error() {
// A refusal/content-filter finish is deterministic: retrying the same
// request yields the same refusal. It must NOT surface as the
// retryable EmptyCompletion error (issue #3624).
let messages = vec![Ok(ChatCompletionMessage::assistant(Content::part(""))
.finish_reason(FinishReason::ContentFilter))];
let fixture: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
let actual = fixture.into_full(false).await.unwrap_err();
let domain_error = actual.downcast_ref::<crate::Error>().unwrap();
assert!(matches!(domain_error, crate::Error::Refusal));
}
#[tokio::test]
async fn test_into_full_refusal_with_partial_content_is_error() {
// Mid-stream refusals can arrive after partial output. The partial
// text has already been streamed to the UI; the turn still must end
// with the refusal error rather than looping.
let messages = vec![
Ok(ChatCompletionMessage::assistant(Content::part(
"I was about to say",
))),
Ok(ChatCompletionMessage::assistant(Content::part(""))
.finish_reason(FinishReason::ContentFilter)),
];
let fixture: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
let actual = fixture.into_full(false).await.unwrap_err();
let domain_error = actual.downcast_ref::<crate::Error>().unwrap();
assert!(matches!(domain_error, crate::Error::Refusal));
}
#[tokio::test]
async fn test_into_full_empty_completion_with_tool_calls_should_not_error() {
// Fixture: Create a stream with empty content but with tool calls
let tool_call = ToolCallFull {
name: ToolName::new("test_tool"),
call_id: Some(ToolCallId::new("call_123")),
arguments: serde_json::json!("test_arg").into(),
thought_signature: None,
};
let messages = vec![Ok(ChatCompletionMessage::default()
.content(Content::part(""))
.add_tool_call(ToolCall::Full(tool_call.clone())))];
let result_stream: BoxStream<ChatCompletionMessage, anyhow::Error> =
Box::pin(tokio_stream::iter(messages));
// Actual: Convert stream to full message
let actual = result_stream.into_full(false).await.unwrap();
// Expected: Should succeed because tool calls are present
let expected = ChatCompletionMessageFull {
content: "".to_string(),
tool_calls: vec![tool_call],
thought_signature: None,
usage: Usage::default(),
reasoning: None,
reasoning_details: None,
finish_reason: None,
phase: None,
};
assert_eq!(actual, expected);
}
}
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