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"""End-to-end viewer regression: requires Playwright and a browser.
Build the chapter, then run python graph/test_browser.py chapter25 --browser msedge.
Use --browser firefox for Playwright's Firefox build. See README.md for setup.
"""
from pathlib import Path
import argparse
from functools import partial
from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer
import os
import subprocess
import sys
import time
from threading import Thread
ROOT = Path(__file__).resolve().parent.parent
# Optional workspace-local test dependencies; no runtime dependency for the viewer.
sys.path.insert(0, str(ROOT / "build/graph-tools"))
if (ROOT / "build/graph-browsers").is_dir():
os.environ.setdefault("PLAYWRIGHT_BROWSERS_PATH", str(ROOT / "build/graph-browsers"))
from playwright.sync_api import sync_playwright
def check(chapter, browser_name):
number = int(chapter.removeprefix("chapter"))
package = "com.seaofnodes.simple." + ("print." if number >= 20 else "")
artifacts = ROOT / "build/graph-browser" / (chapter + "-" + browser_name)
artifacts.mkdir(parents=True, exist_ok=True)
log = artifacts / "compiler.log"
with log.open("w") as output:
process = subprocess.Popen([
"java", "-ea", "-Dsimple.graph.open=false", "-cp", "build/classes/main",
package + "JSViewer"], cwd=ROOT/chapter, stdout=output, stderr=subprocess.STDOUT)
try:
for _ in range(200):
text = log.read_text()
if "Graph viewer: " in text:
break
assert process.poll() is None, text
time.sleep(.05)
url = text.split("Graph viewer: ")[1].splitlines()[0]
with sync_playwright() as playwright:
browser = (playwright.firefox.launch(headless=True) if browser_name == "firefox"
else playwright.chromium.launch(channel=browser_name, headless=True))
page = browser.new_page(viewport={"width": 1400, "height": 1000})
errors = []
page.on("pageerror", lambda error: errors.append(str(error)))
page.goto(url)
page.wait_for_function("done && current === 0 && !rendering", timeout=15000)
assert page.locator("#graph svg g.node").count() > 0
assert page.locator("#doPrev").is_disabled()
page.locator("#doNext").click()
page.wait_for_function("current === 1 && !rendering")
page.locator("#doPrev").click()
page.wait_for_function("current === 0 && !rendering")
for source in ("return 1 + 2;",
"int x=0; while(x<arg) { x=x+1; } return x;"):
previous = page.evaluate("generation")
page.locator("#program").fill(source)
page.locator("#compile").click()
page.wait_for_function(
"previous => generation > previous && done && current === 0 && !rendering",
arg=previous, timeout=15000)
total = int(page.locator("#len").inner_text())
assert total > 1
for index in range(1, total):
page.locator("#doNext").click()
page.wait_for_function("index => current === index && !rendering", arg=index)
assert page.locator("#doNext").is_disabled()
assert "error" not in page.locator("#status").inner_text().lower()
if number == 25:
assert page.locator("#elk g.node").count() == page.evaluate("frames[current].snap.nodes.length")
# Revisit cached geometry and keep the selected node across steps.
page.evaluate("""() => {
window.lastLayout = frames[current].layout;
window.pickId = frames[current].snap.roots[0];
renderer.select(pickId);
layout.run = () => { throw new Error('Cached frame was laid out again'); };
}""")
page.locator("#doPrev").click()
page.wait_for_function("index => current === index && !rendering", arg=total - 2)
page.locator("#doNext").click()
page.wait_for_function("index => current === index && !rendering", arg=total - 1)
assert page.evaluate("frames[current].layout === lastLayout && renderer.pick === pickId")
page.evaluate("delete layout.run")
assert page.locator("#detail").is_visible()
page.keyboard.press("Escape")
print(chapter, browser_name, total, "frames rendered:", source, flush=True)
assert not errors, errors
page.screenshot(path=str(artifacts / "viewer.png"))
page.locator("#doExit").click()
page.wait_for_function("document.getElementById('status').textContent.includes('disconnected')")
assert not page.is_closed()
assert process.wait(timeout=5) == 0, log.read_text()[-2000:]
# A page opened without any compiler must not remain "Connecting...".
class QuietHandler(SimpleHTTPRequestHandler):
def log_message(self, *args):
pass
http = ThreadingHTTPServer(("127.0.0.1", 0),
partial(QuietHandler, directory=str(ROOT / "graph/web")))
thread = Thread(target=http.serve_forever, daemon=True)
thread.start()
try:
offline = browser.new_page()
offline.goto("http://127.0.0.1:" + str(http.server_port) + "/index.html")
offline.wait_for_function(
"document.getElementById('status').textContent.includes('disconnected')")
assert offline.locator("#compile").is_disabled()
assert not offline.is_closed()
finally:
http.shutdown()
http.server_close()
thread.join()
browser.close()
finally:
if process.poll() is None:
process.terminate()
process.wait(timeout=5)
print(chapter, browser_name, "startup, forward/back, recompile, all frames, disconnect, and offline startup passed")
if __name__ == "__main__":
parser = argparse.ArgumentParser(description=__doc__)
parser.add_argument("chapter", nargs="?", default="chapter25")
parser.add_argument("--browser", default="msedge", choices=("msedge", "chrome", "firefox"))
args = parser.parse_args()
check(args.chapter, args.browser)
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