import random

import string

import subprocess

import sys

import tempfile

from contextlib import contextmanager

from pathlib import Path

from textwrap import dedent

from typing import List, Tuple

from feast import cli

from feast.feature_store import FeatureStore

def get_example_repo(example_repo_py) -> str:

parent = Path(__file__).parent

traversal_limit = 5

while traversal_limit > 0 and parent.parts[-1] != "tests":

traversal_limit -= 1

parent = parent.parent

if parent.parts[-1] != "tests":

raise ValueError(f"Unable to find where repo {example_repo_py} is located")

return (parent / "example_repos" / example_repo_py).read_text()

class CliRunner:

"""

NB. We can't use test runner helper from click here, since it doesn't start a new Python

interpreter. And we need a new interpreter for each test since we dynamically import

modules from the feature repo, and it is hard to clean up that state otherwise.

"""

def run(self, args: List[str], cwd: Path) -> subprocess.CompletedProcess:

return subprocess.run(

[sys.executable, cli.__file__] + args, cwd=cwd, capture_output=True

)

def run_with_output(self, args: List[str], cwd: Path) -> Tuple[int, bytes]:

try:

return (

0,

subprocess.check_output(

[sys.executable, cli.__file__] + args,

cwd=cwd,

stderr=subprocess.STDOUT,

),

)

except subprocess.CalledProcessError as e:

return e.returncode, e.output

@contextmanager

def local_repo(self, example_repo_py: str, offline_store: str):

"""

Convenience method to set up all the boilerplate for a local feature repo.

"""

project_id = "test" + "".join(

random.choice(string.ascii_lowercase + string.digits) for _ in range(10)

)

with (

tempfile.TemporaryDirectory() as repo_dir_name,

tempfile.TemporaryDirectory() as data_dir_name,

):

repo_path = Path(repo_dir_name)

data_path = Path(data_dir_name)

repo_config = repo_path / "feature_store.yaml"

repo_config.write_text(

dedent(

f"""

project: {project_id}

registry: {data_path / "registry.db"}

provider: local

online_store:

path: {data_path / "online_store.db"}

offline_store:

type: {offline_store}

entity_key_serialization_version: 2

"""

)

)

repo_example = repo_path / "example.py"

repo_example.write_text(example_repo_py)

result = self.run(["apply"], cwd=repo_path)

stdout = result.stdout.decode("utf-8")

stderr = result.stderr.decode("utf-8")

print(f"Apply stdout:\n{stdout}")

print(f"Apply stderr:\n{stderr}")

assert (

result.returncode == 0

), f"stdout: {result.stdout}\nstderr: {result.stderr}"

yield FeatureStore(repo_path=str(repo_path), config=None)

result = self.run(["teardown"], cwd=repo_path)

stdout = result.stdout.decode("utf-8")

stderr = result.stderr.decode("utf-8")

print(f"Apply stdout:\n{stdout}")

print(f"Apply stderr:\n{stderr}")

assert (

result.returncode == 0

), f"stdout: {result.stdout}\nstderr: {result.stderr}"