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test: add malformed FIX parser regression cases #43

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test: add malformed FIX parser regression cases#43
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help wantedExtra attention is neededsecuritySecurity hardening, parser safety, secrets, and supply chaintestsTest coverage, fixtures, regression tests

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@Ashutosh0x
Ashutosh0x
opened on Apr 30, 2026

Add parser regression tests for malformed FIX 4.4 inputs.

Acceptance criteria:

  • Cover invalid checksum, malformed tag, missing required field, and truncated message cases.
  • Assert no panic and a structured error result.
  • Add comments explaining why each case matters.
  • Keep fixtures small and safe to inspect publicly.

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    help wantedExtra attention is neededsecuritySecurity hardening, parser safety, secrets, and supply chaintestsTest coverage, fixtures, regression tests

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