feat(app-state): App State Sync Resilience (#208)

feat(app-state): App State Sync Resilience (#208)

src/__tests__/Utils/app-state-version.test.ts

@@ -0,0 +1,64 @@
+import type { LTHashState } from '../../Types'
+import { ensureLTHashStateVersion } from '../../Utils/chat-utils'
+
+describe('ensureLTHashStateVersion', () => {
+	const makeState = (version: any): LTHashState => ({
+		version,
+		hash: Buffer.alloc(128),
+		indexValueMap: { someKey: { valueMac: Buffer.from([1, 2, 3]) } }
+	})
+
+	it('should return state unchanged for valid numeric version', () => {
+		const state = makeState(5)
+		const result = ensureLTHashStateVersion(state)
+		expect(result).toBe(state)
+		expect(result.version).toBe(5)
+	})
+
+	it('should fix undefined version to 0', () => {
+		const state = makeState(undefined)
+		const result = ensureLTHashStateVersion(state)
+		expect(result.version).toBe(0)
+	})
+
+	it('should fix null version to 0', () => {
+		const state = makeState(null)
+		const result = ensureLTHashStateVersion(state)
+		expect(result.version).toBe(0)
+	})
+
+	it('should fix NaN version to 0', () => {
+		const state = makeState(NaN)
+		const result = ensureLTHashStateVersion(state)
+		expect(result.version).toBe(0)
+	})
+
+	it('should fix string version to 0', () => {
+		const state = makeState('3' as any)
+		const result = ensureLTHashStateVersion(state)
+		expect(result.version).toBe(0)
+	})
+
+	it('should keep version 0 as-is', () => {
+		const state = makeState(0)
+		const result = ensureLTHashStateVersion(state)
+		expect(result).toBe(state)
+		expect(result.version).toBe(0)
+	})
+
+	it('should preserve other state fields', () => {
+		const state = makeState(undefined)
+		const originalHash = state.hash
+		const originalMap = state.indexValueMap
+		const result = ensureLTHashStateVersion(state)
+		expect(result.hash).toBe(originalHash)
+		expect(result.indexValueMap).toBe(originalMap)
+	})
+
+	it('should allow .toString() after fix without throwing', () => {
+		const state = makeState(undefined)
+		ensureLTHashStateVersion(state)
+		expect(() => state.version.toString()).not.toThrow()
+		expect(state.version.toString()).toBe('0')
+	})
+})