Spaces:
Paused
Paused
File size: 9,132 Bytes
b5b9c2e | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 | """Tests for the ContextEngine ABC and plugin slot."""
import json
import pytest
from typing import Any, Dict, List
from agent.context_engine import ContextEngine
from agent.context_compressor import ContextCompressor
# ---------------------------------------------------------------------------
# A minimal concrete engine for testing the ABC
# ---------------------------------------------------------------------------
class StubEngine(ContextEngine):
"""Minimal engine that satisfies the ABC without doing real work."""
def __init__(self, context_length=200000, threshold_pct=0.50):
self.context_length = context_length
self.threshold_tokens = int(context_length * threshold_pct)
self._compress_called = False
self._tools_called = []
@property
def name(self) -> str:
return "stub"
def update_from_response(self, usage: Dict[str, Any]) -> None:
self.last_prompt_tokens = usage.get("prompt_tokens", 0)
self.last_completion_tokens = usage.get("completion_tokens", 0)
self.last_total_tokens = usage.get("total_tokens", 0)
def should_compress(self, prompt_tokens: int = None) -> bool:
tokens = prompt_tokens if prompt_tokens is not None else self.last_prompt_tokens
return tokens >= self.threshold_tokens
def compress(self, messages: List[Dict[str, Any]], current_tokens: int = None) -> List[Dict[str, Any]]:
self._compress_called = True
self.compression_count += 1
# Trivial: just return as-is
return messages
def get_tool_schemas(self) -> List[Dict[str, Any]]:
return [
{
"name": "stub_search",
"description": "Search the stub engine",
"parameters": {"type": "object", "properties": {}},
}
]
def handle_tool_call(self, name: str, args: Dict[str, Any]) -> str:
self._tools_called.append(name)
return json.dumps({"ok": True, "tool": name})
# ---------------------------------------------------------------------------
# ABC contract tests
# ---------------------------------------------------------------------------
class TestContextEngineABC:
"""Verify the ABC enforces the required interface."""
def test_cannot_instantiate_abc_directly(self):
with pytest.raises(TypeError):
ContextEngine()
def test_missing_methods_raises(self):
"""A subclass missing required methods cannot be instantiated."""
class Incomplete(ContextEngine):
@property
def name(self):
return "incomplete"
with pytest.raises(TypeError):
Incomplete()
def test_stub_engine_satisfies_abc(self):
engine = StubEngine()
assert isinstance(engine, ContextEngine)
assert engine.name == "stub"
def test_compressor_is_context_engine(self):
c = ContextCompressor(model="test", quiet_mode=True, config_context_length=200000)
assert isinstance(c, ContextEngine)
assert c.name == "compressor"
# ---------------------------------------------------------------------------
# Default method behavior
# ---------------------------------------------------------------------------
class TestDefaults:
"""Verify ABC default implementations work correctly."""
def test_default_tool_schemas_empty(self):
engine = StubEngine()
# StubEngine overrides this, so test the base via super
assert ContextEngine.get_tool_schemas(engine) == []
def test_default_handle_tool_call_returns_error(self):
engine = StubEngine()
result = ContextEngine.handle_tool_call(engine, "unknown", {})
data = json.loads(result)
assert "error" in data
def test_default_get_status(self):
engine = StubEngine()
engine.last_prompt_tokens = 50000
status = engine.get_status()
assert status["last_prompt_tokens"] == 50000
assert status["context_length"] == 200000
assert status["threshold_tokens"] == 100000
assert 0 < status["usage_percent"] <= 100
def test_on_session_reset(self):
engine = StubEngine()
engine.last_prompt_tokens = 999
engine.compression_count = 3
engine.on_session_reset()
assert engine.last_prompt_tokens == 0
assert engine.compression_count == 0
def test_should_compress_preflight_default_false(self):
engine = StubEngine()
assert engine.should_compress_preflight([]) is False
# ---------------------------------------------------------------------------
# StubEngine behavior
# ---------------------------------------------------------------------------
class TestStubEngine:
def test_should_compress(self):
engine = StubEngine(context_length=100000, threshold_pct=0.50)
assert not engine.should_compress(40000)
assert engine.should_compress(50000)
assert engine.should_compress(60000)
def test_compress_tracks_count(self):
engine = StubEngine()
msgs = [{"role": "user", "content": "hello"}]
result = engine.compress(msgs)
assert result == msgs
assert engine._compress_called
assert engine.compression_count == 1
def test_tool_schemas(self):
engine = StubEngine()
schemas = engine.get_tool_schemas()
assert len(schemas) == 1
assert schemas[0]["name"] == "stub_search"
def test_handle_tool_call(self):
engine = StubEngine()
result = engine.handle_tool_call("stub_search", {})
assert json.loads(result)["ok"] is True
assert "stub_search" in engine._tools_called
def test_update_from_response(self):
engine = StubEngine()
engine.update_from_response({"prompt_tokens": 1000, "completion_tokens": 200, "total_tokens": 1200})
assert engine.last_prompt_tokens == 1000
assert engine.last_completion_tokens == 200
# ---------------------------------------------------------------------------
# ContextCompressor session reset via ABC
# ---------------------------------------------------------------------------
class TestCompressorSessionReset:
"""Verify ContextCompressor.on_session_reset() clears all state."""
def test_reset_clears_state(self):
c = ContextCompressor(model="test", quiet_mode=True, config_context_length=200000)
c.last_prompt_tokens = 50000
c.compression_count = 3
c._previous_summary = "some old summary"
c._context_probed = True
c._context_probe_persistable = True
c.on_session_reset()
assert c.last_prompt_tokens == 0
assert c.last_completion_tokens == 0
assert c.last_total_tokens == 0
assert c.compression_count == 0
assert c._context_probed is False
assert c._context_probe_persistable is False
assert c._previous_summary is None
# ---------------------------------------------------------------------------
# Plugin slot (PluginManager integration)
# ---------------------------------------------------------------------------
class TestPluginContextEngineSlot:
"""Test register_context_engine on PluginContext."""
def test_register_engine(self):
from hermes_cli.plugins import PluginManager, PluginContext, PluginManifest
mgr = PluginManager()
manifest = PluginManifest(name="test-lcm")
ctx = PluginContext(manifest, mgr)
engine = StubEngine()
ctx.register_context_engine(engine)
assert mgr._context_engine is engine
assert mgr._context_engine.name == "stub"
def test_reject_second_engine(self):
from hermes_cli.plugins import PluginManager, PluginContext, PluginManifest
mgr = PluginManager()
manifest = PluginManifest(name="test-lcm")
ctx = PluginContext(manifest, mgr)
engine1 = StubEngine()
engine2 = StubEngine()
ctx.register_context_engine(engine1)
ctx.register_context_engine(engine2) # should be rejected
assert mgr._context_engine is engine1
def test_reject_non_engine(self):
from hermes_cli.plugins import PluginManager, PluginContext, PluginManifest
mgr = PluginManager()
manifest = PluginManifest(name="test-bad")
ctx = PluginContext(manifest, mgr)
ctx.register_context_engine("not an engine")
assert mgr._context_engine is None
def test_get_plugin_context_engine(self):
from hermes_cli.plugins import PluginManager, PluginContext, PluginManifest, get_plugin_context_engine, _plugin_manager
import hermes_cli.plugins as plugins_mod
# Inject a test manager
old_mgr = plugins_mod._plugin_manager
try:
mgr = PluginManager()
plugins_mod._plugin_manager = mgr
assert get_plugin_context_engine() is None
engine = StubEngine()
mgr._context_engine = engine
assert get_plugin_context_engine() is engine
finally:
plugins_mod._plugin_manager = old_mgr
|