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tests/test_env.py — Smoke tests and grader unit tests.
Run with: pytest tests/ -v
"""
import asyncio
import pytest
from sql_env.models import SQLAction, SQLTask
from sql_env.grader import grade, generate_feedback
from sql_env.env import SQLCorrectionEnv
from sql_env.tasks import ALL_TASKS, EASY_TASKS, MEDIUM_TASKS, HARD_TASKS
# ── Helpers ───────────────────────────────────────────────────────────────────
def _make_task(broken: str, canonical: str, difficulty: str = "easy") -> SQLTask:
return SQLTask(
task_id="test_task",
difficulty=difficulty,
broken_query=broken,
canonical_answer=canonical,
)
def _action(query: str) -> SQLAction:
return SQLAction(corrected_query=query)
# ── Grader unit tests ─────────────────────────────────────────────────────────
class TestGrader:
def test_exact_match_returns_099(self):
task = _make_task(
"SELECT * FORM users",
"SELECT * FROM users",
)
reward = grade(_action("SELECT * FROM users"), task)
assert reward.value == 0.99
def test_exact_match_case_insensitive(self):
task = _make_task(
"SELECT * FORM users",
"SELECT * FROM users",
)
reward = grade(_action("select * from users"), task)
assert reward.value == 0.99
def test_exact_match_trailing_semicolon(self):
task = _make_task(
"SELECT * FORM users",
"SELECT * FROM users",
)
reward = grade(_action("SELECT * FROM users;"), task)
assert reward.value == 0.99
def test_wrong_answer_not_perfect(self):
task = _make_task(
"SELECT * FORM users",
"SELECT * FROM users",
)
reward = grade(_action("SELECT * FORM users"), task)
assert reward.value < 0.99
def test_completely_wrong_returns_001(self):
task = _make_task(
"SELECT * FORM users",
"SELECT * FROM users",
)
reward = grade(_action("hello world"), task)
assert reward.value == 0.01
def test_basic_structure_returns_02(self):
task = _make_task(
"SELECT * FORM users WHERE id = 1",
"SELECT * FROM users WHERE id = 1",
)
# Correct structure, still has FROM typo
reward = grade(_action("SELECT * FORM users WHERE id = 1"), task)
assert reward.value == pytest.approx(0.2, abs=0.05)
def test_reward_range_is_strictly_open(self):
task = _make_task(
"SELCT * FORM users WEHRE id = 1",
"SELECT * FROM users WHERE id = 1",
)
for query in [
"hello world",
"SELECT * FORM users",
"SELECT * FROM users WHERE id = 1",
"select * from users where id = 1",
]:
reward = grade(_action(query), task)
assert 0.0 < reward.value < 1.0, (
f"Reward {reward.value} out of (0, 1) for query: {query}"
)
def test_feedback_not_empty(self):
task = _make_task("SELECT * FORM users", "SELECT * FROM users")
reward = grade(_action("SELECT * FROM users"), task)
fb = generate_feedback(_action("SELECT * FROM users"), task, reward)
assert isinstance(fb, str) and len(fb) > 0
# ── Task catalogue tests ──────────────────────────────────────────────────────
class TestTaskCatalogue:
def test_easy_task_count(self):
assert len(EASY_TASKS) >= 10, "Need at least 10 easy tasks"
def test_medium_task_count(self):
assert len(MEDIUM_TASKS) >= 10, "Need at least 10 medium tasks"
def test_hard_task_count(self):
assert len(HARD_TASKS) >= 5, "Need at least 5 hard tasks"
def test_all_task_ids_unique(self):
all_ids = [t.task_id for tasks in ALL_TASKS.values() for t in tasks]
assert len(all_ids) == len(set(all_ids)), "Duplicate task IDs found"
def test_easy_tasks_have_hints(self):
for task in EASY_TASKS:
assert task.error_hint is not None and len(task.error_hint) > 0, (
f"Easy task {task.task_id} missing error_hint"
)
def test_hard_tasks_have_schema(self):
for task in HARD_TASKS:
assert task.schema_context is not None and len(task.schema_context) > 0, (
f"Hard task {task.task_id} missing schema_context"
)
def test_canonical_answers_are_valid_sql(self):
"""Canonical answers must at least contain SELECT and FROM."""
for difficulty, tasks in ALL_TASKS.items():
for task in tasks:
upper = task.canonical_answer.upper()
assert "SELECT" in upper, (
f"{task.task_id}: canonical_answer missing SELECT"
)
assert "FROM" in upper, (
f"{task.task_id}: canonical_answer missing FROM"
)
def test_grading_canonical_answer_returns_perfect(self):
"""Every task must return 0.99 when given its own canonical answer."""
for difficulty, tasks in ALL_TASKS.items():
for task in tasks:
action = _action(task.canonical_answer)
reward = grade(action, task)
assert reward.value == 0.99, (
f"{task.task_id}: canonical answer did not score 0.99 "
f"(got {reward.value})"
)
def test_grading_broken_query_below_perfect(self):
"""Broken queries must score below the perfect 0.99 score."""
for difficulty, tasks in ALL_TASKS.items():
for task in tasks:
action = _action(task.broken_query)
reward = grade(action, task)
assert reward.value < 0.99, (
f"{task.task_id}: broken query unexpectedly scored 0.99"
)
# ── Environment integration tests ─────────────────────────────────────────────
class TestEnvironment:
def test_reset_returns_observation(self):
async def run():
env = SQLCorrectionEnv(difficulty="easy")
obs = await env.reset()
assert obs.task_id is not None
assert obs.broken_query is not None
assert obs.step_number == 0
assert obs.steps_remaining == 5
asyncio.run(run())
def test_step_returns_result(self):
async def run():
env = SQLCorrectionEnv(difficulty="easy")
await env.reset()
result = await env.step(_action("SELECT * FROM users WHERE id = 1"))
assert 0.0 < result.reward < 1.0
assert isinstance(result.done, bool)
assert result.observation.step_number == 1
asyncio.run(run())
def test_steps_remaining_decrements(self):
async def run():
env = SQLCorrectionEnv(difficulty="easy")
await env.reset()
result = await env.step(_action("SELECT * FROM x"))
assert result.observation.steps_remaining == 4
asyncio.run(run())
def test_correct_answer_terminates(self):
async def run():
env = SQLCorrectionEnv(difficulty="easy", task_index=0)
await env.reset()
canonical = EASY_TASKS[0].canonical_answer
result = await env.step(_action(canonical))
assert result.done is True
assert result.reward == pytest.approx(0.99)
asyncio.run(run())
def test_max_steps_terminates(self):
async def run():
env = SQLCorrectionEnv(difficulty="easy", task_index=0)
await env.reset()
result = None
for _ in range(5):
result = await env.step(_action("SELECT * FORM users"))
assert result.done is True
asyncio.run(run())
def test_done_episode_raises(self):
async def run():
env = SQLCorrectionEnv(difficulty="easy", task_index=0)
await env.reset()
canonical = EASY_TASKS[0].canonical_answer
await env.step(_action(canonical)) # this terminates
with pytest.raises(RuntimeError):
await env.step(_action("SELECT 1"))
asyncio.run(run())
def test_medium_hint_hidden(self):
async def run():
env = SQLCorrectionEnv(difficulty="medium")
obs = await env.reset()
assert obs.error_hint is None
asyncio.run(run())
def test_hard_schema_present(self):
async def run():
env = SQLCorrectionEnv(difficulty="hard")
obs = await env.reset()
assert obs.schema_context is not None
asyncio.run(run())
def test_state_reflects_progress(self):
async def run():
env = SQLCorrectionEnv(difficulty="easy", task_index=0)
await env.reset()
await env.step(_action("SELECT * FORM users"))
state = await env.state()
assert state["step_count"] == 1
assert state["done"] is False
asyncio.run(run())
def test_all_difficulties_reset(self):
async def run():
for diff in ["easy", "medium", "hard"]:
env = SQLCorrectionEnv(difficulty=diff)
obs = await env.reset()
assert obs.broken_query is not None
asyncio.run(run())
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