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change(web): clarify path-last-match assertions

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This commit is contained in:
Joshua Horton 2025-08-26 08:52:50 -05:00
parent 9362f2e0a0
commit 27f7a4727b
1 changed files with 10 additions and 6 deletions
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16
web/src/test/auto/headless/engine/predictive-text/worker-thread/context/alignment-helpers.tests.ts
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@ -14,28 +14,32 @@ import { computeAlignment, EditOperation, getEditPathLastMatch, isSubstitutionAl
describe('getEditPathLastMatch', () => {
it('returns the last match when no substitutions exist', () => {
const path: EditOperation[] = ['delete', 'delete', 'match', 'match', 'match', 'match', 'insert'];
assert.equal(getEditPathLastMatch(path), path.lastIndexOf('match'));
assert.equal(path.lastIndexOf('match'), 5);
assert.equal(getEditPathLastMatch(path), 5);
});
it('returns the last match when no substitutions exist left of a "match"', () => {
const path: EditOperation[] = ['delete', 'delete', 'match', 'match', 'match', 'match', 'substitute', 'insert'];
assert.equal(getEditPathLastMatch(path), path.lastIndexOf('match'));
assert.equal(path.lastIndexOf('match'), 5);
assert.equal(getEditPathLastMatch(path), 5);
});
// is intended to handle application of suggestions.
it('returns the last match before a substitute occurring after the first match', () => {
// limitation: if there is _anything_ after that last match, the first assertion will fail.
// 0 1 2 3 4 5 6
const path: EditOperation[] = ['delete', 'delete', 'match', 'match', 'substitute', 'match', 'match'];
assert.notEqual(getEditPathLastMatch(path), path.lastIndexOf('match'));
assert.equal(getEditPathLastMatch(path), path.lastIndexOf('match', path.lastIndexOf('substitute')));
assert.notEqual(getEditPathLastMatch(path), 6);
assert.equal(getEditPathLastMatch(path), 3);
});
// is intended to handle complex transforms that include a whitespace and affect prior tokens.
it('returns the last match before a substitute occurring after the first match', () => {
// limitation: if there is _anything_ after that last match, the first assertion will fail.
// 0 1 2 3 4 5 6
const path: EditOperation[] = ['delete', 'delete', 'match', 'match', 'substitute', 'match', 'substitute'];
assert.notEqual(getEditPathLastMatch(path), path.lastIndexOf('match'));
assert.equal(getEditPathLastMatch(path), path.lastIndexOf('match', path.indexOf('substitute')));
assert.notEqual(getEditPathLastMatch(path), 5);
assert.equal(getEditPathLastMatch(path), 3);
});
});