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import { describe, it } from 'bun:test';
import { strict as assert } from 'bun:assert';
import * as Diff3 from '../src/diff3.mjs';
describe('diff3Merge', () => {
it('performs diff3 merge on arrays', () => {
const o = ['AA', 'ZZ', '00', 'M', '99'];
const a = ['AA', 'a', 'b', 'c', 'ZZ', 'new', '00', 'a', 'a', 'M', '99'];
const b = ['AA', 'a', 'd', 'c', 'ZZ', '11', 'M', 'z', 'z', '99'];
const result = Diff3.diff3Merge(a, o, b);
/*
AA
<<<<<<< a
a
b
c
||||||| o
=======
a
d
c
>>>>>>> b
ZZ
<<<<<<< a
new
00
a
a
||||||| o
00
=======
11
>>>>>>> b
M
z
z
99
*/
assert.deepEqual(result[0].ok, ['AA']);
assert.deepEqual(result[0].conflict, undefined);
assert.deepEqual(result[1].ok, undefined);
assert.deepEqual(result[1].conflict.o, []);
assert.deepEqual(result[1].conflict.a, ['a', 'b', 'c']);
assert.deepEqual(result[1].conflict.b, ['a', 'd', 'c']);
assert.deepEqual(result[2].ok, ['ZZ']);
assert.deepEqual(result[2].conflict, undefined);
assert.deepEqual(result[3].ok, undefined);
assert.deepEqual(result[3].conflict.o, ['00']);
assert.deepEqual(result[3].conflict.a, ['new', '00', 'a', 'a']);
assert.deepEqual(result[3].conflict.b, ['11']);
assert.deepEqual(result[4].ok, ['M', 'z', 'z', '99']);
assert.deepEqual(result[4].conflict, undefined);
});
it('strings split on whitespace by default to avoid surprises - issue #9', () => {
const o = 'was touring';
const a = 'was here touring';
const b = 'was into touring';
const result = Diff3.diff3Merge(a, o, b);
assert.deepEqual(result[0].ok, ['was']);
assert.deepEqual(result[0].conflict, undefined);
assert.deepEqual(result[1].ok, undefined);
assert.deepEqual(result[1].conflict.o, []);
assert.deepEqual(result[1].conflict.a, ['here']);
assert.deepEqual(result[1].conflict.b, ['into']);
assert.deepEqual(result[2].ok, ['touring']);
assert.deepEqual(result[2].conflict, undefined);
});
it('strings can optionally split on given separator', () => {
const o = 'new hampshire, new mexico, north carolina';
const a = 'new hampshire, new jersey, north carolina';
const b = 'new hampshire, new york, north carolina';
const result = Diff3.diff3Merge(a, o, b, { stringSeparator: /,\s+/ });
assert.deepEqual(result[0].ok, ['new hampshire']);
assert.deepEqual(result[0].conflict, undefined);
assert.deepEqual(result[1].ok, undefined);
assert.deepEqual(result[1].conflict.o, ['new mexico']);
assert.deepEqual(result[1].conflict.a, ['new jersey']);
assert.deepEqual(result[1].conflict.b, ['new york']);
assert.deepEqual(result[2].ok, ['north carolina']);
assert.deepEqual(result[2].conflict, undefined);
});
it('excludes false conflicts by default', () => {
const o = 'AA ZZ';
const a = 'AA a b c ZZ';
const b = 'AA a b c ZZ';
const result = Diff3.diff3Merge(a, o, b);
assert.deepEqual(result[0].ok, ['AA', 'a', 'b', 'c', 'ZZ']);
assert.deepEqual(result[0].conflict, undefined);
});
it('can include false conflicts with option', () => {
const o = 'AA ZZ';
const a = 'AA a b c ZZ';
const b = 'AA a b c ZZ';
const result = Diff3.diff3Merge(a, o, b, { excludeFalseConflicts: false });
assert.deepEqual(result[0].ok, ['AA']);
assert.deepEqual(result[0].conflict, undefined);
assert.deepEqual(result[1].ok, undefined);
assert.deepEqual(result[1].conflict.o, []);
assert.deepEqual(result[1].conflict.a, ['a', 'b', 'c']);
assert.deepEqual(result[1].conflict.b, ['a', 'b', 'c']);
assert.deepEqual(result[2].ok, ['ZZ']);
assert.deepEqual(result[2].conflict, undefined);
});
it('avoids improper hunk sorting - see openstreetmap/iD#3058', () => {
const o = ['n4100522632', 'n4100697091', 'n4100697136', 'n4102671583', 'n4102671584', 'n4102671585', 'n4102671586', 'n4102671587', 'n4102671588', 'n4102677889', 'n4102677890', 'n4094374176'];
const a = ['n4100522632', 'n4100697091', 'n4100697136', 'n-10000', 'n4102671583', 'n4102671584', 'n4102671585', 'n4102671586', 'n4102671587', 'n4102671588', 'n4102677889', 'n4102677890', 'n4094374176'];
const b = ['n4100522632', 'n4100697091', 'n4100697136', 'n4102671583', 'n4102671584', 'n4102671585', 'n4102671586', 'n4102671587', 'n4102671588', 'n4102677889', 'n4105613618', 'n4102677890', 'n4105613617', 'n4094374176'];
const expected = ['n4100522632', 'n4100697091', 'n4100697136', 'n-10000', 'n4102671583', 'n4102671584', 'n4102671585', 'n4102671586', 'n4102671587', 'n4102671588', 'n4102677889', 'n4105613618', 'n4102677890', 'n4105613617', 'n4094374176'];
const result = Diff3.diff3Merge(a, o, b);
assert.deepEqual(result[0].ok, expected);
});
it('yaml comparison - issue #46', () => {
const o = `title: "title"
description: "description"`;
const a = `title: "title"
description: "description changed"`;
const b = `title: "title changed"
description: "description"`;
const result = Diff3.diff3Merge(a, o, b, { stringSeparator: /[\r\n]+/ });
assert.deepEqual(result[0].ok, undefined);
assert.deepEqual(result[0].conflict.o, ['title: "title"', 'description: "description"']);
assert.deepEqual(result[0].conflict.a, ['title: "title"', 'description: "description changed"']);
assert.deepEqual(result[0].conflict.b, ['title: "title changed"', 'description: "description"']);
});
it('handles very large inputs', () => {
// Copying a large region with `push(...items)` used to overflow the call stack
const o = Array.from({ length: 1000000 }, (_, i) => `line ${i}`);
const a = o.slice();
const b = o.slice();
b[999000] = 'changed';
const result = Diff3.diff3Merge(a, o, b);
assert.deepEqual(result.length, 1);
assert.deepEqual(result[0].ok, b);
});
});