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test: stabilize bun coverage reporting

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Kyle Yasuda
2026-03-27 23:35:59 -07:00
parent 23b2360ac4
commit 9caf25bedb
26 changed files with 732 additions and 99 deletions
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61
scripts/run-coverage-lane.test.ts Normal file
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import assert from 'node:assert/strict';
import test from 'node:test';
import { mergeLcovReports } from './run-coverage-lane';
test('mergeLcovReports combines duplicate source-file counters across shard outputs', () => {
const merged = mergeLcovReports([
[
'SF:src/example.ts',
'FN:10,alpha',
'FNDA:1,alpha',
'DA:10,1',
'DA:11,0',
'BRDA:10,0,0,1',
'BRDA:10,0,1,-',
'end_of_record',
'',
].join('\n'),
[
'SF:src/example.ts',
'FN:10,alpha',
'FN:20,beta',
'FNDA:2,alpha',
'FNDA:1,beta',
'DA:10,2',
'DA:11,1',
'DA:20,1',
'BRDA:10,0,0,0',
'BRDA:10,0,1,1',
'end_of_record',
'',
].join('\n'),
]);
assert.match(merged, /SF:src\/example\.ts/);
assert.match(merged, /FN:10,alpha/);
assert.match(merged, /FN:20,beta/);
assert.match(merged, /FNDA:3,alpha/);
assert.match(merged, /FNDA:1,beta/);
assert.match(merged, /FNF:2/);
assert.match(merged, /FNH:2/);
assert.match(merged, /DA:10,3/);
assert.match(merged, /DA:11,1/);
assert.match(merged, /DA:20,1/);
assert.match(merged, /LF:3/);
assert.match(merged, /LH:3/);
assert.match(merged, /BRDA:10,0,0,1/);
assert.match(merged, /BRDA:10,0,1,1/);
assert.match(merged, /BRF:2/);
assert.match(merged, /BRH:2/);
});
test('mergeLcovReports keeps distinct source files as separate records', () => {
const merged = mergeLcovReports([
['SF:src/a.ts', 'DA:1,1', 'end_of_record', ''].join('\n'),
['SF:src/b.ts', 'DA:2,1', 'end_of_record', ''].join('\n'),
]);
assert.match(merged, /SF:src\/a\.ts[\s\S]*end_of_record/);
assert.match(merged, /SF:src\/b\.ts[\s\S]*end_of_record/);
});