Question
Answer and Explanation
It's not directly possible to write Allure metadata to JUnit XML output as they serve different purposes and have different structures. Allure generates its own separate reports, and JUnit XML is a more basic format for test results. However, you can integrate some information to the JUnit XML if needed, albeit in a limited manner.
Here's a breakdown of what's possible and how to achieve it:
Understanding the Limitations
- Allure Metadata: Allure's annotations (like @allure.feature, @allure.severity, @allure.title, @allure.description, and @allure.link) are designed to create rich, interactive HTML reports using its own format. This information goes into the Allure report and is not inherently compatible with the JUnit XML structure.
- JUnit XML: JUnit XML is primarily focused on storing test results (pass/fail/skip), test names, and basic error information. It does not support custom metadata attributes like those used by Allure.
Possible but Limited Integration Approaches
1. Adding Allure Description to JUnit XML (Limited)
- If the most important piece of Allure metadata is your test description, you can add this as the test's failure message in the JUnit output, but only if there is a failure.
- You can use Pytest's hooks and a fixture to intercept the test result and use allure.description to add it as the failure message when the test fails. Here's how:
import pytest
import allure
from _pytest.runner import CallInfo
@pytest.fixture(scope="function", autouse=True)
def attach_allure_description_to_junit(request):
yield
if request.node.rep_call.failed:
if hasattr(allure, 'description') and allure.description:
allure_description = allure.description
else:
allure_description = "No allure description available."
request.node.rep_call.longrepr = allure_description
- This code will take the Allure description and, on failure, append it as the failure message in JUnit XML, where usually just the failure text is present.
- This adds the description ONLY in failures and in a different field from where other metadata appears.
2. Using Pytest Markers
- You can use Pytest markers (which can be viewed in the JUnit output) to store some Allure metadata (e.g. severity) in a way that can be filtered or analyzed later. This method does not directly store Allure metadata as it is, but can represent it with a basic tag/label.
- For example:
import pytest
import allure
@allure.severity(allure.severity_level.CRITICAL)
@pytest.mark.severity_critical
def test_critical_function():
assert 1 == 1
- In this example, @allure.severity and @pytest.mark.severity_critical act as two tags/labels representing the same thing and in a different location, Allure and JUnit XML respectively.
3. Custom Plugin
- You could create a custom Pytest plugin to parse some of the Allure metadata and inject it into JUnit XML output as custom properties, if your JUnit XML consumer supports them. This is a much more complex approach and has a limited audience depending on how this information is going to be used. You would need to manually parse the information and add it to the XML yourself.
Why not directly supported?
- The primary reason for this limitation is that JUnit XML is an older, simpler standard and doesn't provide mechanisms for rich metadata. Allure was built to address that gap, providing a more comprehensive test report and visualization tool. Both are intended to be used separately, each for different use cases.
Recommendation:
- If you need detailed test metadata, focus on using the Allure reports, as those are the primary outputs of the Allure framework. Do not focus on trying to write that information to a different type of report like the JUnit XML as the result might be not what you expect.
- If you just need basic test results in JUnit format, use the Pytest built-in JUnit feature and augment the description with the solution shown earlier, if needed.
In conclusion, while you cannot directly map Allure's extensive metadata to JUnit XML because of format limitations, you can employ workarounds like transferring descriptions to the failure message or using markers if you need some information in the JUnit XML reports.