mirror of
https://github.com/retspen/webvirtcloud
synced 2026-11-08 11:16:47 +00:00
490b337453
The VM page polls the VM state every 5 s and reloads when it differs from the state the page was rendered with. Since the polling moved to pollWhileVisible, that state was kept in a top-level "var status", which is not a page variable but the browser's window.status. Where the browser does not keep a value there, the poll compared the answer with "" and reloaded the page every 5 s, back to its first tab. The variable is now vm_status. A Node test runs the page's script with a window.status that keeps nothing.
62 lines
2.6 KiB
Python
62 lines
2.6 KiB
Python
"""Pages poll the server through static/js/poll.js: one request at a time,
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none while the page is hidden. Its behaviour is checked with Node."""
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import json
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import re
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import shutil
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import subprocess
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import unittest
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from pathlib import Path
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from django.conf import settings
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BASE = Path(settings.BASE_DIR)
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POLLING_TEMPLATES = ["instances/templates/instance.html", "computes/templates/overview.html"]
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class PollTestCase(unittest.TestCase):
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@unittest.skipUnless(shutil.which("node"), "node is not installed")
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def test_poll_js(self):
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result = subprocess.run(
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["node", str(BASE / "webvirtcloud/js_tests/poll.test.js"), str(BASE / "static/js/poll.js")],
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capture_output=True,
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text=True,
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timeout=60,
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)
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self.assertEqual(result.returncode, 0, result.stderr)
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def test_pages_poll_through_poll_js(self):
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for template in POLLING_TEMPLATES:
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with self.subTest(template=template):
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source = (BASE / template).read_text()
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self.assertNotIn("setInterval", source)
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self.assertIn("pollWhileVisible(", source)
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@unittest.skipUnless(shutil.which("node"), "node is not installed")
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def test_the_vm_page_reloads_only_when_the_state_changes(self):
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# "status" is a property of the browser's window: a page variable of
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# that name holds what the browser makes of it (a string, or nothing)
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source = (BASE / "instances/templates/instance.html").read_text()
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script = re.search(r"<script>\s*(backgroundJobRunning = false;.*?)</script>", source, re.S).group(1)
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script = script.replace("{{ instance.status|lower }}", "1").replace(
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"{% url 'instances:status' instance.id %}", "/instances/1/status/"
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)
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js = """
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const vm = require("vm");
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const results = {};
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for (const answer of [1, 5]) {
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let reloads = 0;
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const page = {
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pollWhileVisible: (interval, request, onData) => { onData({status: answer}); return {stop() {}}; },
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$: () => ({submit() {}}),
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};
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page.window = {location: {reload: () => reloads++}};
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Object.defineProperty(page, "status", {get: () => "", set: () => {}});
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vm.runInNewContext(SCRIPT, vm.createContext(page));
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results[answer] = reloads;
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}
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console.log(JSON.stringify(results));
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""".replace("SCRIPT", json.dumps(script))
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out = subprocess.run(["node", "-e", js], capture_output=True, text=True, timeout=30)
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self.assertEqual(out.returncode, 0, out.stderr)
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self.assertEqual(json.loads(out.stdout), {"1": 0, "5": 1})
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