[Test Improver] test: extend list command and compile display helper coverage (+33 tests)

[danielmeppiel]

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Goal and Rationale

Two command modules had very thin test coverage:

Module	Before	After
commands/list_cmd.py (101 lines)	1 test	14 tests
commands/compile/cli.py display helpers (165 lines)	0 tests	20 tests

The list command has multiple branches (empty scripts, scripts with/without start, Rich path, Rich exception fallback, error path) that were unexercised. The compile display helpers (_display_single_file_summary, _display_next_steps, _display_validation_errors, _get_validation_suggestion) are user-facing output functions with both Rich and plain-text paths — neither had any tests.

Approach

test_list_command_extended.py (13 tests)

• NoScripts: empty dict → warning shown, fallback example rendered
• WithScripts: start key → default label appears; without start → no label; all script names/commands rendered
• RichPath: mocked console → console.print called; Rich exception → plain-text fallback
• ErrorHandling: exception in _list_available_scripts → exit code 1 + error message

test_compile_display_helpers.py (20 tests)

• _get_validation_suggestion: all four branches (missing description, applyTo, empty content, fallback)
• _display_validation_errors: empty list, single error with/without : separator, Rich path, fallback path
• _display_next_steps: filename included in output, install step shown, Rich path
• _display_single_file_summary: primitives count, constitution hash, None hash → dash, dry-run, empty stats dict

Coverage Impact

File	Tests Before	Tests After	Delta
commands/list_cmd.py	1	14	+13
commands/compile/cli.py helpers	0	20	+20
Total suite	3108	3141	+33

Test Status

All 3141 tests pass:

uv run pytest tests/unit tests/test_console.py -x -q
3141 passed in 12.21s

Reproducibility

uv run pytest tests/unit/test_list_command_extended.py tests/unit/test_compile_display_helpers.py -v
# All 33 tests pass

uv run pytest tests/unit tests/test_console.py -x -q
# 3141 passed

Trade-offs

• Tests mock _get_console and _list_available_scripts to isolate display logic — straightforward and low-maintenance
• No new dependencies

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