view data tests

apps/website/lib/builders/view-data/SignupViewDataBuilder.test.ts

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+import { describe, it, expect } from 'vitest';
+import { SignupViewDataBuilder } from './SignupViewDataBuilder';
+import type { SignupPageDTO } from '@/lib/services/auth/types/SignupPageDTO';
+
+describe('SignupViewDataBuilder', () => {
+  describe('happy paths', () => {
+    it('should transform SignupPageDTO to SignupViewData correctly', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result).toEqual({
+        returnTo: '/dashboard',
+        formState: {
+          fields: {
+            firstName: { value: '', error: undefined, touched: false, validating: false },
+            lastName: { value: '', error: undefined, touched: false, validating: false },
+            email: { value: '', error: undefined, touched: false, validating: false },
+            password: { value: '', error: undefined, touched: false, validating: false },
+            confirmPassword: { value: '', error: undefined, touched: false, validating: false },
+          },
+          isValid: true,
+          isSubmitting: false,
+          submitError: undefined,
+          submitCount: 0,
+        },
+        isSubmitting: false,
+        submitError: undefined,
+      });
+    });
+
+    it('should handle empty returnTo path', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.returnTo).toBe('');
+    });
+
+    it('should handle returnTo with query parameters', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard?welcome=true',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.returnTo).toBe('/dashboard?welcome=true');
+    });
+  });
+
+  describe('data transformation', () => {
+    it('should preserve all DTO fields in the output', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.returnTo).toBe(signupPageDTO.returnTo);
+    });
+
+    it('should not modify the input DTO', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const originalDTO = { ...signupPageDTO };
+      SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(signupPageDTO).toEqual(originalDTO);
+    });
+
+    it('should initialize all signup form fields with default values', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.formState.fields.firstName.value).toBe('');
+      expect(result.formState.fields.firstName.error).toBeUndefined();
+      expect(result.formState.fields.firstName.touched).toBe(false);
+      expect(result.formState.fields.firstName.validating).toBe(false);
+
+      expect(result.formState.fields.lastName.value).toBe('');
+      expect(result.formState.fields.lastName.error).toBeUndefined();
+      expect(result.formState.fields.lastName.touched).toBe(false);
+      expect(result.formState.fields.lastName.validating).toBe(false);
+
+      expect(result.formState.fields.email.value).toBe('');
+      expect(result.formState.fields.email.error).toBeUndefined();
+      expect(result.formState.fields.email.touched).toBe(false);
+      expect(result.formState.fields.email.validating).toBe(false);
+
+      expect(result.formState.fields.password.value).toBe('');
+      expect(result.formState.fields.password.error).toBeUndefined();
+      expect(result.formState.fields.password.touched).toBe(false);
+      expect(result.formState.fields.password.validating).toBe(false);
+
+      expect(result.formState.fields.confirmPassword.value).toBe('');
+      expect(result.formState.fields.confirmPassword.error).toBeUndefined();
+      expect(result.formState.fields.confirmPassword.touched).toBe(false);
+      expect(result.formState.fields.confirmPassword.validating).toBe(false);
+    });
+
+    it('should initialize form state with default values', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.formState.isValid).toBe(true);
+      expect(result.formState.isSubmitting).toBe(false);
+      expect(result.formState.submitError).toBeUndefined();
+      expect(result.formState.submitCount).toBe(0);
+    });
+
+    it('should initialize UI state flags correctly', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.isSubmitting).toBe(false);
+      expect(result.submitError).toBeUndefined();
+    });
+  });
+
+  describe('edge cases', () => {
+    it('should handle returnTo with encoded characters', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard?redirect=%2Fadmin',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.returnTo).toBe('/dashboard?redirect=%2Fadmin');
+    });
+
+    it('should handle returnTo with hash fragment', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard#section',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.returnTo).toBe('/dashboard#section');
+    });
+  });
+
+  describe('form state structure', () => {
+    it('should have all required form fields', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      expect(result.formState.fields).toHaveProperty('firstName');
+      expect(result.formState.fields).toHaveProperty('lastName');
+      expect(result.formState.fields).toHaveProperty('email');
+      expect(result.formState.fields).toHaveProperty('password');
+      expect(result.formState.fields).toHaveProperty('confirmPassword');
+    });
+
+    it('should have consistent field state structure', () => {
+      const signupPageDTO: SignupPageDTO = {
+        returnTo: '/dashboard',
+      };
+
+      const result = SignupViewDataBuilder.build(signupPageDTO);
+
+      const fields = result.formState.fields;
+      Object.values(fields).forEach((field) => {
+        expect(field).toHaveProperty('value');
+        expect(field).toHaveProperty('error');
+        expect(field).toHaveProperty('touched');
+        expect(field).toHaveProperty('validating');
+      });
+    });
+  });
+});