[Fix] ClusterExecutor add dependency tests

[jan-janssen]

Summary by CodeRabbit

• Tests
  • Expanded test coverage for task dependency execution across multiple executor implementations.
  • Added validation for dependency chaining, result caching, and task completion ordering.

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📝 Walkthrough

Walkthrough

New test methods test_executor_dependencies were added across three executor test files to verify dependency handling and result caching. Each test submits dependent task chains, asserts non-completion before resolution, resolves futures, and validates cache entries and final completion status.

Changes

Cohort / File(s)	Summary
Executor Dependency Tests tests/unit/executor/test_api.py, tests/unit/executor/test_flux_cluster.py, tests/unit/executor/test_slurm_cluster.py	Added test_executor_dependencies methods across three executor implementations to validate dependency chaining, result caching, and completion tracking. Tests follow consistent pattern: submit dependent task pairs, verify initial non-completion, resolve futures, assert cache directory entries, and verify final completion.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~12 minutes

Possibly related PRs

• PR #477: Adds disable_dependencies option to control dependency handling, directly related to the dependency behavior being tested in this PR.
• PR #435: Implements cache_directory support and task execution caching logic that these new tests exercise and validate.
• PR #637: Refactors executor and dependency implementations, which directly impacts the dependency execution and caching mechanisms these tests verify.

Poem

🐰 Three executors hop in line,
Dependencies entangled, oh so fine!
Futures chained with cache so dear,
Tests verify: no bug to fear! ✨

🚥 Pre-merge checks | ✅ 3 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'add dependency tests' aligns with the main changes, which add test methods for dependency handling across three executor types.
Merge Conflict Detection	✅ Passed	✅ No merge conflicts detected when merging into main

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch test_dependencies

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[coderabbitai]

Actionable comments posted: 1

🤖 Fix all issues with AI agents

In `@tests/unit/executor/test_slurm_cluster.py`:
- Around line 38-40: The SBATCH directive in the Jinja template uses the wrong
option name `--dependency_list`; change it to the correct SLURM option
`--dependency` so the generated line becomes `#SBATCH --dependency=afterok:{{
dependency_list | join(',') }}` when `dependency_list` is present; update the
template that renders `dependency_list` (the Jinja block using the variable
dependency_list) to emit `--dependency` instead of `--dependency_list`.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.83%. Comparing base (c73022b) to head (159bee5).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #924   +/-   ##
=======================================
  Coverage   93.83%   93.83%           
=======================================
  Files          38       38           
  Lines        1963     1963           
=======================================
  Hits         1842     1842           
  Misses        121      121           

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