[IMP] web: add tests for bundle pregeneration.

Since bundle generations should be generated before post install tests,
a loading of a /web shouldn't try to save a new version

This is currently breaking for / because of the website_id added in the
extra part of the attachement. Even if the content is the same.

Part-of: odoo/odoo#99176

addons/web/tests/test_assets.py

@@ -6,15 +6,19 @@ import time
 import odoo
 import odoo.tests
 
+from odoo.tests.common import HttpCase
 from odoo.modules.module import get_manifest
 from odoo.tools import mute_logger
 
+from unittest.mock import patch
+
 _logger = logging.getLogger(__name__)
 
 
 class TestAssetsGenerateTimeCommon(odoo.tests.TransactionCase):
 
     def generate_bundles(self):
+        self.env['ir.attachment'].search([('url', '=like', '/web/assets/%')]).unlink() # delete existing attachement
         installed_module_names = self.env['ir.module.module'].search([('state', '=', 'installed')]).mapped('name')
         bundles = {
             key
@@ -65,3 +69,19 @@ class TestAssetsGenerateTime(TestAssetsGenerateTimeCommon):
         for bundle, duration in self.generate_bundles():
             threshold = thresholds.get(bundle, 2)
             self.assertLess(duration, threshold, "Bundle %r took more than %s sec" % (bundle, threshold))
+
+@odoo.tests.tagged('post_install', '-at_install')
+class TestLoad(HttpCase):
+    def test_assets_already_exists(self):
+        self.authenticate('admin', 'admin')
+        _save_attachment = odoo.addons.base.models.assetsbundle.AssetsBundle.save_attachment
+
+        def save_attachment(bundle, extension, content):
+            attachment = _save_attachment(bundle, extension, content)
+            message = f"Trying to save an attachement for {bundle.name} when it should already exist: {attachment.url}"
+            _logger.error(message)
+            return attachment
+
+        with patch('odoo.addons.base.models.assetsbundle.AssetsBundle.save_attachment', save_attachment):
+            self.url_open('/web').raise_for_status()
+            #self.url_open('/').raise_for_status() #currently breaking because of the website_id