fix: avoid cell errors for header mismatches - #1799
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When the header has fewer or more columns than the schema, match the expected fields to the header. This avoids reporting missing-cell or extra-cell errors for every data row. Validation and analysis now only use fields that are actually available, while irregular rows still report cell errors as expected. Add regression tests for these cases. Refs frictionlessdata#1791
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With
fieldsMatch: "exact", a header mismatch was reported twice: once asmissing-labelorextra-label, and again as a cell error for every row.This PR makes the expected fields follow the header length. Integrity checks and analyzer statistics now only use fields that are actually present, while irregular rows still report cell errors as expected.
I added regression tests for missing and extra labels, integrity constraints, and irregular rows. The full test suite passes (
1876 passed, 292 skipped).