view models

apps/website/lib/view-models/UpdateAvatarViewModel.test.ts

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+import { describe, it, expect } from 'vitest';
+import { UpdateAvatarViewModel } from './UpdateAvatarViewModel';
+
+describe('UpdateAvatarViewModel', () => {
+  it('creates instance with success true and no error', () => {
+    const dto = { success: true };
+
+    const viewModel = new UpdateAvatarViewModel(dto);
+
+    expect(viewModel.success).toBe(true);
+    expect(viewModel.error).toBeUndefined();
+  });
+
+  it('creates instance with success false and error', () => {
+    const dto = { success: false, error: 'Update failed' };
+
+    const viewModel = new UpdateAvatarViewModel(dto);
+
+    expect(viewModel.success).toBe(false);
+    expect(viewModel.error).toBe('Update failed');
+  });
+
+  it('isSuccessful reflects success flag', () => {
+    const successVm = new UpdateAvatarViewModel({ success: true });
+    const failureVm = new UpdateAvatarViewModel({ success: false });
+
+    expect(successVm.isSuccessful).toBe(true);
+    expect(failureVm.isSuccessful).toBe(false);
+  });
+
+  it('hasError reflects presence of error message', () => {
+    const noErrorVm = new UpdateAvatarViewModel({ success: true });
+    const errorVm = new UpdateAvatarViewModel({ success: false, error: 'Something went wrong' });
+
+    expect(noErrorVm.hasError).toBe(false);
+    expect(errorVm.hasError).toBe(true);
+  });
+
+  it('treats empty error string as no error', () => {
+    const viewModel = new UpdateAvatarViewModel({ success: false, error: '' });
+
+    expect(viewModel.hasError).toBe(false);
+  });
+});