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SYS-REQ-078SystemReview

When GetInt is called on empty input, the parser shall return the same not-found or error behavior as Get on empty input.

PriorityshallTypeguaranteeCategoryfunctionalComponentparserAssuranceEFindingsnone open

Specification

The requirement exactly as authored — its complete prose text and, where present, the formal FRETish sentence it compiles to.

Description

When GetInt is called on empty input, the parser shall return the same not-found or error behavior as Get on empty input.

FRETish formula
the parser shall always satisfy !getint_input_is_empty | returns_getint_error_for_empty_input

Rationale & tags

Why this requirement exists, and how it is categorised.

Empty input to GetInt delegates to Get. The empty-input behavior must be explicitly covered.

getintempty

Verification & provenance

How this requirement was checked: the review trail, edit history, and the machine-analysis status terms (each ⓘ explains what it means).

Assurance levelE
Formalizationvalid
Realizabilityrealizable
Vacuitychecked_ok
Strategyfretish

Review

Status
approved
Reviewer
human:leonidbugaev
Reviewed
Apr 23, 2026, 00:00 UTC

History

Created
Apr 14, 2026, 18:00 UTC · agent:claude
Modified
Jul 26, 2026, 14:54 UTC · human:cli

Obligations

What this requirement must witness to be considered satisfied — the required evidence, and the tests that discharge each one.

2 obligations · 2 discharged

Browse the catalogue
Discharged

Behavior when inputs are absent, nil, zero-length, or blank.

Worst case if violatedLow

GetInt on an empty []byte returns 0 (silent success) instead of KeyPathNotFoundError, masking missing data as a valid zero and corrupting accumulator invariants.

Discharging evidence1/1 required witnessed
  • nominalrequiredpresent
    Covered by 1 test
Discharged

Behavior specified when inputs are nil, null, or zero-value.

Worst case if violatedHigh

GetInt on nil data panics in nextToken at data[0] instead of returning the not-found result, crashing the caller on a nil trust-boundary input.

Discharging evidence2/2 required witnessed
  • negativerequiredpresent
    Covered by 1 test
  • nominalrequiredpresent
    Covered by 1 test

Formula evidence

The formal formula behind this requirement, the variables it is written over, and the tests that exercise it (each term is explained inline).

FRETish formula

the parser shall always satisfy !getint_input_is_empty | returns_getint_error_for_empty_input

Variables

NameTypeDirectionDescription
getint_input_is_emptyTrue when GetInt is called on empty input.
returns_getint_error_for_empty_inputTrue when GetInt returns not-found or error for empty input.

Witnesses· 3 scenarios total

  • TestGetIntEmptyInput
    deep_spec_test.go:768
  • TestMCDC_SYS_REQ_078_Row1_TriggerFalse
    mcdc_spec_witnesses_test.go:2559exercises 1 condition scenario
  • TestMCDC_SYS_REQ_078_Row2_InvariantViolation
    mcdc_spec_witnesses_test.go:2567exercises 1 condition scenario
  • TestMCDC_SYS_REQ_078_Row3_EmptyInputError
    mcdc_spec_witnesses_test.go:2575exercises 1 condition scenario
  • TestObligation_SYS_REQ_078
    obligation_evidence_test.go:575

Its place

This requirement shown inside its trace neighbourhood — the parents it satisfies, the code and tests attached to it, and its findings.

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Trace evidence

The concrete artifacts linked to this requirement — implementing code, verifying tests, documents, and the findings raised against it.

Impact

Blast radius — if you change this requirement, what else may need re-checking, and what it in turn depends on.

If you change this

Requirements
0
Files
1
Tests
3
At-risk contracts
0

Files to re-check (1)

  • parser.goparser.go

Tests to re-run (3)

  • deep_spec_test.godeep_spec_test.go
  • mcdc_spec_witnesses_test.gomcdc_spec_witnesses_test.go
  • obligation_evidence_test.goobligation_evidence_test.go

What this rests on

Discussions

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