[ADD] project_task_code_portal: add portal report tests

Add test coverage for portal task report generation and project sharing
functionality:
- Add test for HTML report generation through portal
- Add test for project sharing view with task code display
- Cover missing lines in portal controller

Task: 3241

Author: halbtonjazz

project_task_code_portal/tests/test_portal.py

@@ -1,6 +1,8 @@
 # Copyright 2025 Cetmix OÜ
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
 
+import re
+
 from lxml import html
 
 from odoo import Command, tools
@@ -84,6 +86,117 @@ def test_portal_task_search_link_format(self):
             self.url_task_code_pattern.format(self.task_1.code)[:-1] + query_params,
         )
 
+    def test_portal_task_report(self):
+        """Test task report generation through portal."""
+        self.authenticate("portal", "portal")
+        # Check if hr_timesheet module is installed
+        hr_timesheet_installed = bool(
+            self.env["ir.module.module"].search(
+                [("name", "=", "hr_timesheet"), ("state", "=", "installed")]
+            )
+        )
+        response = self.url_open(self.base_url + self.task_1.code + "?report_type=html")
+        if hr_timesheet_installed:
+            # If hr_timesheet is installed, expect successful response
+            # _show_task_report is overridden by hr_timesheet to generate timesheet reports
+            self.assertEqual(response.status_code, 200)
+            self.assertIn("text/html", response.headers.get("Content-Type", ""))
+        else:
+            # If hr_timesheet is not installed, expect error response
+            # _show_task_report raises MissingError("There is nothing to report.")
+            # This method is to be overriden to report timesheets if the module is installed
+            self.assertEqual(response.status_code, 400)
+            content = response.content
+            tree = html.fromstring(content)
+            error_elements = tree.xpath(
+                "//pre[contains(text(), 'There is nothing to report.')]"
+            )
+            self.assertTrue(
+                error_elements,
+                "Error message 'There is nothing to report.' not found in response",
+            )
+
+    def test_portal_task_project_sharing(self):
+        """Test project sharing functionality."""
+        self.authenticate("portal", "portal")
+
+        # First, access multiple tasks to build up history
+        other_task = self.env["project.task"].create(
+            {
+                "name": "Other Task",
+                "project_id": self.task_1.project_id.id,
+            }
+        )
+        self.url_open(f"{self.base_url}{other_task.code}")
+
+        # Share the project with portal user
+        project_share_wizard = self.env["project.share.wizard"].create(
+            {
+                "access_mode": "edit",
+                "res_model": "project.project",
+                "res_id": self.task_1.project_id.id,
+                "partner_ids": [Command.link(self.partner_portal.id)],
+            }
+        )
+        project_share_wizard.action_send_mail()
+
+        # Get the sharing link from the most recent mail message
+        message = self.env["mail.message"].search(
+            [
+                ("partner_ids", "in", self.partner_portal.id),
+                ("model", "=", "project.project"),
+                ("res_id", "=", self.task_1.project_id.id),
+            ],
+            order="id DESC",
+            limit=1,
+        )
+
+        share_link = str(message.body.split('href="')[1].split('">')[0])
+        match = re.search(
+            r"access_token=([^&]+)&pid=([^&]+)&hash=([^&]*)", share_link
+        )
+        access_token, pid, _hash = match.groups()
+
+        # Access the task with project sharing context
+        url = f"{self.base_url}{self.task_1.code}"
+
+        # Get initial response to extract CSRF token
+        initial_response = self.url_open(url)
+        content = initial_response.text
+        csrf_token = re.search(r'csrf_token: "([^"]+)"', content).group(1)
+
+        # Make the POST request with CSRF token and project_sharing=True
+        response = self.url_open(
+            url=url,
+            data={
+                "csrf_token": csrf_token,
+                "access_token": access_token,
+                "project_sharing": True,
+                "pid": pid,
+                "hash": _hash,
+            },
+        )
+
+        self.assertEqual(response.status_code, 200)
+
+        # Now check if the navigation links for previous/next task are not present
+        # This would indicate that the history was reset to only contain the current task
+        content = response.content
+        tree = html.fromstring(content)
+
+        # Check for absence of navigation links (prev/next)
+        # which would be present if history had multiple tasks
+        prev_links = tree.xpath("//a[contains(@class, 'o_portal_pager_previous')]")
+        next_links = tree.xpath("//a[contains(@class, 'o_portal_pager_next')]")
+
+        # If history was reset to only current task, there should be no prev/next links
+        self.assertFalse(
+            prev_links, "Previous task link should not be present if history was reset"
+        )
+        self.assertFalse(
+            next_links, "Next task link should not be present if history was reset"
+        )
+
 
 @tagged("-at_install", "post_install")
 class TestPortalProjectTaskCode(TestProjectPortalCommon, HttpCaseWithUserPortal):