"""Regression tests for context isolation and bounded REPL feedback."""
from __future__ import annotations
from aleph.core import Aleph
from aleph.prompts.system import DEFAULT_SYSTEM_PROMPT
from aleph.repl.sandbox import SandboxConfig
from aleph.types import ContentFormat, ContextMetadata, ExecutionResult
def test_default_prompt_omits_context_preview_placeholder() -> None:
assert "{context_preview}" not in DEFAULT_SYSTEM_PROMPT
assert "Preview (first 500 chars)" not in DEFAULT_SYSTEM_PROMPT
def test_build_initial_messages_redacts_context_preview_value() -> None:
aleph = Aleph.__new__(Aleph)
aleph.system_prompt = DEFAULT_SYSTEM_PROMPT + "\npreview={context_preview}"
aleph.context_var_name = "ctx"
meta = ContextMetadata(
format=ContentFormat.TEXT,
size_bytes=123,
size_chars=123,
size_lines=3,
size_tokens_estimate=30,
structure_hint="text",
sample_preview="TOP_SECRET_CONTEXT",
)
messages = aleph._build_initial_messages("Question?", meta)
system_message = messages[0]["content"]
assert "TOP_SECRET_CONTEXT" not in system_message
assert "[OMITTED FOR CONTEXT ISOLATION]" in system_message
def test_format_repl_result_truncates_large_return_value() -> None:
aleph = Aleph.__new__(Aleph)
aleph.sandbox_config = SandboxConfig(max_output_chars=120)
aleph.output_feedback = "full"
result = ExecutionResult(
stdout="",
stderr="",
return_value="A" * 5000,
variables_updated=[],
truncated=False,
execution_time_ms=1.0,
error=None,
)
rendered = aleph._format_repl_result(result)
assert "TRUNCATED" in rendered
assert "A" * 1000 not in rendered
