🎉 init

app/utils/identity.test.ts

@@ -0,0 +1,45 @@
+import { describe, expect, it } from 'vitest'
+import { readIdentity, writeIdentity } from './identity'
+
+function createMockStorage(): Storage {
+  const store = new Map<string, string>()
+  return {
+    getItem: (key: string) => store.get(key) ?? null,
+    setItem: (key: string, value: string) => void store.set(key, value),
+    removeItem: (key: string) => void store.delete(key),
+    clear: () => store.clear(),
+    key: () => null,
+    get length() { return store.size },
+  }
+}
+
+describe('identity storage', () => {
+  it('returns null when nothing is stored', () => {
+    expect(readIdentity(createMockStorage())).toBeNull()
+  })
+
+  it('round-trips a written identity', () => {
+    const storage = createMockStorage()
+    writeIdentity(storage, { name: 'Alice' })
+    expect(readIdentity(storage)).toEqual({ name: 'Alice' })
+  })
+
+  it('ignores malformed JSON', () => {
+    const storage = createMockStorage()
+    storage.setItem('stb:identity', '{not json')
+    expect(readIdentity(storage)).toBeNull()
+  })
+
+  it('ignores an empty stored name', () => {
+    const storage = createMockStorage()
+    storage.setItem('stb:identity', JSON.stringify({ name: '   ' }))
+    expect(readIdentity(storage)).toBeNull()
+  })
+
+  it('overwrites a previously stored identity', () => {
+    const storage = createMockStorage()
+    writeIdentity(storage, { name: 'Alice' })
+    writeIdentity(storage, { name: 'Bob' })
+    expect(readIdentity(storage)).toEqual({ name: 'Bob' })
+  })
+})