test: add 39 unit tests for estimate-cost helpers - #18
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Export pure helper functions (estimateTokens, extractText, extractToolNames, formatTokens, formatCost, formatDuration, PRICING, CORRECTION_SIGNALS) and add comprehensive unit tests covering edge cases, boundary conditions, and correction signal regex accuracy. Test suite: 43 → 82 tests.
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Superseded by #25. |
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Exports pure helper functions from
estimate-cost.tsand adds comprehensive tests:estimateTokens— token estimation from char countextractText— content block text extraction (string, array, null)extractToolNames— tool_use name extractionformatTokens/formatCost/formatDuration— display formattersPRICING— model pricing table validationCORRECTION_SIGNALS— regex accuracy (10 positive, 6 negative cases)Test suite: 43 → 82 tests. All passing.