Update test assertions for enhanced API error messages

[Copilot]

Previous commits enhanced API client error messages with troubleshooting guidance. Test assertions needed updates to match the new message formats.

Changes

• test_dandiarchive.py: Updated 8 assertions across 7 test functions for "No such Dandiset", "No such asset", and "No asset at path" errors
• test_delete.py: Updated 1 assertion for "No such Dandiset" error

Error Message Formats

Before:

assert str(excinfo.value) == "No such Dandiset: '999999'"

After:

assert str(excinfo.value) == (
    "No such Dandiset: '999999'. "
    "Verify the Dandiset ID is correct and that you have access. "
)

Similar updates for asset-related errors now include references to dandi ls and version context where applicable.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 75.11%. Comparing base (75daea4) to head (51dbd8f).
⚠️ Report is 13 commits behind head on enh-lad-errors-api.

Additional details and impacted files

@@                   Coverage Diff                   @@
##           enh-lad-errors-api    #1801       +/-   ##
=======================================================
+ Coverage               50.45%   75.11%   +24.66%     
=======================================================
  Files                      84       84               
  Lines                   11922    11922               
=======================================================
+ Hits                     6015     8955     +2940     
+ Misses                   5907     2967     -2940     

Flag	Coverage Δ
unittests	75.11% <100.00%> (+24.66%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[Copilot]

Just as a heads up, I was blocked by some firewall rules while working on your feedback. Expand below for details.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• 127.0.0.11
  • Triggering command: REDACTED, pid is -1 (packet block)
• api-dandi.emberarchive.org
  • Triggering command: /usr/bin/python python -m pytest dandi/tests/test_dandiarchive.py::test_parse_api_url -v (dns block)
• api-dandi.sandbox.emberarchive.org
  • Triggering command: /usr/bin/python python -m pytest dandi/tests/test_dandiarchive.py::test_parse_api_url -v (dns block)
• api.dandiarchive.org
  • Triggering command: /usr/bin/python python -m pytest dandi/tests/test_dandiarchive.py::test_parse_api_url -v (dns block)
• api.lincbrain.org
  • Triggering command: /usr/bin/python python -m pytest dandi/tests/test_dandiarchive.py::test_parse_api_url -v (dns block)
• api.sandbox.dandiarchive.org
  • Triggering command: /usr/bin/python python -m pytest dandi/tests/test_dandiarchive.py::test_parse_api_url -v (dns block)
• dandiarchive.org
  • Triggering command: /usr/bin/python python -m pytest dandi/tests/test_dandiarchive.py::test_parse_api_url -v (dns block)
• dl.min.io
  • Triggering command: /usr/bin/minio minio server /data bash --no�� --noprofile git cal/bin/bash get pi git bash --no�� --noprofile git al/local/bin/git get --global al/bin/git bash (dns block)
• sandbox.dandiarchive.org
  • Triggering command: /usr/bin/python python -m pytest dandi/tests/test_dandiarchive.py::test_parse_api_url -v (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)