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Add comprehensive pytest tests and .gitignore#1

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add-comprehensive-tests
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Add comprehensive pytest tests and .gitignore#1
SuperInstance wants to merge 1 commit intomainfrom
add-comprehensive-tests

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@SuperInstance SuperInstance commented Apr 12, 2026

Summary

Adds 66 comprehensive pytest tests covering all aspects of the FLUX coverage analyzer.

Tests added (66 tests)

  • CoverageReport (12 tests): instruction_pct, branch_pct, register_pct properties including edge cases
  • _inst_size (18 parametrized tests): all opcode categories and boundary values
  • _count_instructions (5 tests): empty, single, mixed, all-sizes, long programs
  • CoverageCollector (31 tests): all opcodes, edge cases, branch coverage, path tracking

Other additions

  • .gitignore for Python bytecode, IDE files, testing artifacts, fleet health checks

Notable findings

  • Unknown opcode discrepancy: _inst_size returns 4 but VM advances 1 byte
  • Branch not-taken semantics advance by 4 bytes past operands

Staging: Open in Devin

- Add 66 pytest tests covering CoverageReport, _inst_size,
  _count_instructions, and CoverageCollector
- Test all opcodes: MOVI, INC, DEC, ADD, SUB, MUL, CMP_EQ, MOV,
  PUSH, POP, JZ, JNZ
- Test edge cases: empty bytecode, max_cycles, unknown opcodes,
  negative immediates, unreachable code
- Test branch coverage both-ways and path accumulation
- Document known discrepancy with unknown opcode sizing
- Add .gitignore for Python, IDE, testing, and fleet artifacts
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✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 5 additional findings.

Staging: Open in Devin

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