wip

tests/unit/domain/value-objects/CheckoutState.test.ts

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+import { describe, it, expect } from 'vitest';
+import { CheckoutState, CheckoutStateEnum } from '../../../../packages/domain/value-objects/CheckoutState';
+
+/**
+ * CheckoutState Value Object - GREEN PHASE
+ *
+ * Tests for checkout button state detection.
+ */
+
+describe('CheckoutState Value Object', () => {
+  describe('READY state', () => {
+    it('should create READY state from btn-success class', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-success');
+      expect(state.getValue()).toBe(CheckoutStateEnum.READY);
+    });
+
+    it('should detect ready state correctly', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-success');
+      expect(state.isReady()).toBe(true);
+      expect(state.hasInsufficientFunds()).toBe(false);
+    });
+
+    it('should handle additional classes with btn-success', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-lg btn-success pull-right');
+      expect(state.getValue()).toBe(CheckoutStateEnum.READY);
+    });
+
+    it('should be case-insensitive for btn-success', () => {
+      const state = CheckoutState.fromButtonClasses('btn BTN-SUCCESS');
+      expect(state.getValue()).toBe(CheckoutStateEnum.READY);
+    });
+  });
+
+  describe('INSUFFICIENT_FUNDS state', () => {
+    it('should create INSUFFICIENT_FUNDS from btn-default without btn-success', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-default');
+      expect(state.getValue()).toBe(CheckoutStateEnum.INSUFFICIENT_FUNDS);
+    });
+
+    it('should detect insufficient funds correctly', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-default');
+      expect(state.isReady()).toBe(false);
+      expect(state.hasInsufficientFunds()).toBe(true);
+    });
+
+    it('should handle btn-primary as insufficient funds', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-primary');
+      expect(state.getValue()).toBe(CheckoutStateEnum.INSUFFICIENT_FUNDS);
+    });
+
+    it('should handle btn-warning as insufficient funds', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-warning');
+      expect(state.getValue()).toBe(CheckoutStateEnum.INSUFFICIENT_FUNDS);
+    });
+
+    it('should handle disabled button as insufficient funds', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-default disabled');
+      expect(state.getValue()).toBe(CheckoutStateEnum.INSUFFICIENT_FUNDS);
+    });
+  });
+
+  describe('UNKNOWN state', () => {
+    it('should create UNKNOWN when no btn class exists', () => {
+      const state = CheckoutState.fromButtonClasses('some-other-class');
+      expect(state.getValue()).toBe(CheckoutStateEnum.UNKNOWN);
+    });
+
+    it('should create UNKNOWN from empty string', () => {
+      const state = CheckoutState.fromButtonClasses('');
+      expect(state.getValue()).toBe(CheckoutStateEnum.UNKNOWN);
+    });
+
+    it('should detect unknown state correctly', () => {
+      const state = CheckoutState.fromButtonClasses('');
+      expect(state.isReady()).toBe(false);
+      expect(state.hasInsufficientFunds()).toBe(false);
+    });
+  });
+
+  describe('Edge Cases', () => {
+    it('should handle whitespace in class names', () => {
+      const state = CheckoutState.fromButtonClasses('  btn   btn-success  ');
+      expect(state.getValue()).toBe(CheckoutStateEnum.READY);
+    });
+
+    it('should handle multiple spaces between classes', () => {
+      const state = CheckoutState.fromButtonClasses('btn    btn-success');
+      expect(state.getValue()).toBe(CheckoutStateEnum.READY);
+    });
+
+    it('should be immutable after creation', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-success');
+      const originalState = state.getValue();
+      expect(originalState).toBe(CheckoutStateEnum.READY);
+      // Verify no setters exist
+      expect(typeof (state as any).setState).toBe('undefined');
+    });
+  });
+
+  describe('BDD Scenarios', () => {
+    it('Given button with btn-success, When checking state, Then state is READY', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-success');
+      expect(state.getValue()).toBe(CheckoutStateEnum.READY);
+    });
+
+    it('Given button without btn-success, When checking state, Then state is INSUFFICIENT_FUNDS', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-default');
+      expect(state.getValue()).toBe(CheckoutStateEnum.INSUFFICIENT_FUNDS);
+    });
+
+    it('Given no button classes, When checking state, Then state is UNKNOWN', () => {
+      const state = CheckoutState.fromButtonClasses('');
+      expect(state.getValue()).toBe(CheckoutStateEnum.UNKNOWN);
+    });
+
+    it('Given READY state, When checking isReady, Then returns true', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-success');
+      expect(state.isReady()).toBe(true);
+    });
+
+    it('Given INSUFFICIENT_FUNDS state, When checking hasInsufficientFunds, Then returns true', () => {
+      const state = CheckoutState.fromButtonClasses('btn btn-default');
+      expect(state.hasInsufficientFunds()).toBe(true);
+    });
+  });
+});