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Better error message for FileNotFoundErrors (#755)

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* Better error message for FileNotFoundErrors

* Update tests/test_versions_yml.py

Co-authored-by: James A. Fellows Yates <jfy133@gmail.com>

* Update test_versions_yml.py

Co-authored-by: James A. Fellows Yates <jfy133@gmail.com>
This commit is contained in:
Gregor Sturm 2021-09-28 16:51:35 +02:00 committed by GitHub
parent 9c31cf1566
commit 512f5dfc27
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1 changed files with 20 additions and 2 deletions
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22
tests/test_versions_yml.py
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@ -2,6 +2,7 @@ from pathlib import Path
import pytest
import yaml
import re
from textwrap import dedent
def _get_workflow_names():
@ -21,7 +22,22 @@ def _get_workflow_names():
def test_ensure_valid_version_yml(workflow_dir):
workflow_dir = Path(workflow_dir)
software_name = workflow_dir.name.split("_")[0].lower()
versions_yml = (workflow_dir / f"output/{software_name}/versions.yml").read_text()
try:
versions_yml_file = workflow_dir / f"output/{software_name}/versions.yml"
versions_yml = versions_yml_file.read_text()
except FileNotFoundError:
raise AssertionError(
dedent(
f"""\
`versions.yml` not found in the output directory.
Expected path: `{versions_yml_file}`
This can have multiple reasons:
* The test-workflow failed before a `versions.yml` could be generated.
* The workflow name in `test.yml` does not start with the tool name.
"""
)
)
assert (
"END_VERSIONS" not in versions_yml
@ -29,7 +45,9 @@ def test_ensure_valid_version_yml(workflow_dir):
# Raises an exception if yaml is not valid
versions = yaml.safe_load(versions_yml)
assert len(versions) == 1, "The top-level of versions.yml must contain exactely one entry: the process name as dict key"
assert (
len(versions) == 1
), "The top-level of versions.yml must contain exactly one entry: the process name as dict key"
software_versions = next(iter(versions.values()))
assert len(software_versions), "There must be at least one version emitted."
for tool, version in software_versions.items():