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0ce9643 | 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 | """Tests for ScanCache — LRU cache keyed by (model_id, mode, prompt)."""
from neural_mri.core.scan_cache import ScanCache
def test_put_and_get_returns_cached():
c = ScanCache(max_entries=5)
c.put("gpt2", "T1", "hello", {"data": 1})
assert c.get("gpt2", "T1", "hello") == {"data": 1}
def test_get_miss_returns_none():
c = ScanCache()
assert c.get("gpt2", "T1", "nonexistent") is None
def test_lru_eviction_at_max():
c = ScanCache(max_entries=2)
c.put("gpt2", "T1", "a", {"v": 1})
c.put("gpt2", "T2", "b", {"v": 2})
c.put("gpt2", "fMRI", "c", {"v": 3}) # should evict "a"
assert c.get("gpt2", "T1", "a") is None
assert c.get("gpt2", "T2", "b") == {"v": 2}
assert c.get("gpt2", "fMRI", "c") == {"v": 3}
def test_lru_access_refreshes_order():
c = ScanCache(max_entries=2)
c.put("gpt2", "T1", "a", {"v": 1})
c.put("gpt2", "T2", "b", {"v": 2})
c.get("gpt2", "T1", "a") # refresh "a"
c.put("gpt2", "fMRI", "c", {"v": 3}) # should evict "b" not "a"
assert c.get("gpt2", "T1", "a") == {"v": 1}
assert c.get("gpt2", "T2", "b") is None
def test_same_prompt_different_mode_no_collision():
c = ScanCache()
c.put("gpt2", "T1", "hello", {"mode": "T1"})
c.put("gpt2", "T2", "hello", {"mode": "T2"})
assert c.get("gpt2", "T1", "hello") == {"mode": "T1"}
assert c.get("gpt2", "T2", "hello") == {"mode": "T2"}
def test_invalidate_model_removes_only_target():
c = ScanCache()
c.put("gpt2", "T1", "a", {"m": "gpt2"})
c.put("pythia", "T1", "a", {"m": "pythia"})
c.invalidate_model("gpt2")
assert c.get("gpt2", "T1", "a") is None
assert c.get("pythia", "T1", "a") == {"m": "pythia"}
def test_invalidate_model_noop_if_no_match():
c = ScanCache()
c.put("gpt2", "T1", "a", {"v": 1})
c.invalidate_model("unknown")
assert c.get("gpt2", "T1", "a") == {"v": 1}
def test_clear_empties_all():
c = ScanCache()
c.put("gpt2", "T1", "a", {"v": 1})
c.put("gpt2", "T2", "b", {"v": 2})
c.clear()
assert c.get("gpt2", "T1", "a") is None
assert c.get("gpt2", "T2", "b") is None
def test_key_uses_md5_hash():
key = ScanCache._key("gpt2", "T1", "hello")
assert key.startswith("gpt2::T1::")
assert len(key.split("::")[-1]) == 12 # md5[:12]
def test_put_overwrites_same_key():
c = ScanCache()
c.put("gpt2", "T1", "a", {"v": 1})
c.put("gpt2", "T1", "a", {"v": 2})
assert c.get("gpt2", "T1", "a") == {"v": 2}
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