# Extra fixtures used for wasm testing.

from functools import partial

from pathlib import Path

from playwright.sync_api import Page

import pytest

import subprocess

import time

@pytest.fixture(scope="session", autouse=True)

def run_web_server():

with open('serve.log', 'w') as f:

cwd = Path(__file__).parent.parent / 'wasm/test'

proc = subprocess.Popen(

['npm', 'run', 'serve'], stdout=f, stderr=f, cwd=cwd

)

# Wait a bit until server ready to receive connections.

time.sleep(0.3)

yield

proc.terminate()

@pytest.fixture(scope="function", autouse=True)

def load_page(page: Page):

# Load web page at start of every test.

page.goto("http://localhost:8000")

page.locator("#loaded").wait_for()

def subprocess_run(

page: Page,

cmd: list[str],

*,

capture_output: bool = False,

cwd: str | None = None,

text: bool | None = None

) -> subprocess.CompletedProcess:

if cwd is not None:

raise RuntimeError('cwd is not yet supported')

proc = page.evaluate("async cmd => window.cockle.shellRun(cmd)", cmd)

# TypeScript object is auto converted to Python dict.

# Want to return subprocess.CompletedProcess, consider namedtuple if this fails in future.

stdout = proc['stdout'] if capture_output else ''

stderr = proc['stderr'] if capture_output else ''

if not text:

stdout = stdout.encode("utf-8")

stderr = stderr.encode("utf-8")

return subprocess.CompletedProcess(

args=cmd,

returncode=proc['returncode'],

stdout=stdout,

stderr=stderr

)

@pytest.fixture(scope="function", autouse=True)

def mock_subprocess_run(page: Page, monkeypatch):

monkeypatch.setattr(subprocess, "run", partial(subprocess_run, page))