50 lines
1.7 KiB
TypeScript
50 lines
1.7 KiB
TypeScript
import { describe, expect, it } from 'vitest';
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import { applyReadModelDelta, ReadModelDeltaMismatchError } from '../src/realtime/delta.js';
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describe('applyReadModelDelta', () => {
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it('applies a JSON Patch without mutating the previous snapshot', () => {
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const current = {
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general: [{ key: '휴식', possible: true, status: 'available' }],
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inputOptions: { cities: [{ value: 1, label: '업' }] },
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};
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const applied = applyReadModelDelta(current, 'revision-1', {
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kind: 'patch',
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baseRevision: 'revision-1',
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revision: 'revision-2',
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operations: [{ op: 'replace', path: '/general/0/possible', value: false }],
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});
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expect(applied).toEqual({
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revision: 'revision-2',
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data: {
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general: [{ key: '휴식', possible: false, status: 'available' }],
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inputOptions: { cities: [{ value: 1, label: '업' }] },
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},
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});
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expect(current.general[0]?.possible).toBe(true);
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});
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it('keeps the current object for an unchanged revision', () => {
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const current = { value: 1 };
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const applied = applyReadModelDelta(current, 'revision-1', {
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kind: 'unchanged',
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revision: 'revision-1',
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});
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expect(applied.data).toBe(current);
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});
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it('rejects a patch based on a different snapshot', () => {
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expect(() =>
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applyReadModelDelta({ value: 1 }, 'revision-2', {
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kind: 'patch',
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baseRevision: 'revision-1',
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revision: 'revision-3',
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operations: [{ op: 'replace', path: '/value', value: 2 }],
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})
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).toThrow(ReadModelDeltaMismatchError);
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});
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});
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