feat: send dashboard read-model deltas

2026-08-11 12:36:29 +00:00
parent c737ee2cd1
commit a2e94c3092
17 changed files with 1285 additions and 395 deletions
@@ -0,0 +1,49 @@
+import { describe, expect, it } from 'vitest';
+
+import { applyReadModelDelta, ReadModelDeltaMismatchError } from '../src/realtime/delta.js';
+
+describe('applyReadModelDelta', () => {
+    it('applies a JSON Patch without mutating the previous snapshot', () => {
+        const current = {
+            general: [{ key: '휴식', possible: true, status: 'available' }],
+            inputOptions: { cities: [{ value: 1, label: '업' }] },
+        };
+
+        const applied = applyReadModelDelta(current, 'revision-1', {
+            kind: 'patch',
+            baseRevision: 'revision-1',
+            revision: 'revision-2',
+            operations: [{ op: 'replace', path: '/general/0/possible', value: false }],
+        });
+
+        expect(applied).toEqual({
+            revision: 'revision-2',
+            data: {
+                general: [{ key: '휴식', possible: false, status: 'available' }],
+                inputOptions: { cities: [{ value: 1, label: '업' }] },
+            },
+        });
+        expect(current.general[0]?.possible).toBe(true);
+    });
+
+    it('keeps the current object for an unchanged revision', () => {
+        const current = { value: 1 };
+        const applied = applyReadModelDelta(current, 'revision-1', {
+            kind: 'unchanged',
+            revision: 'revision-1',
+        });
+
+        expect(applied.data).toBe(current);
+    });
+
+    it('rejects a patch based on a different snapshot', () => {
+        expect(() =>
+            applyReadModelDelta({ value: 1 }, 'revision-2', {
+                kind: 'patch',
+                baseRevision: 'revision-1',
+                revision: 'revision-3',
+                operations: [{ op: 'replace', path: '/value', value: 2 }],
+            })
+        ).toThrow(ReadModelDeltaMismatchError);
+    });
+});