P1-3: grader/interviewer node unit tests (24 passing)

grader.node.spec.ts — 13 tests: LLM mock validation, breakout logic (shorts/IDontKnow), error handling, scoring/indexing, zh/ja language support interviewer.node.spec.ts — 11 tests: empty questions, index bounds, standard presentation, follow-up mode, zh/ja/en localization
2026-05-19 09:30:19 +08:00
parent b139ae18b7
commit 33e48f6d4e
3 changed files with 229 additions and 1 deletions
@@ -0,0 +1,104 @@
+import { interviewerNode } from './interviewer.node';
+import { AIMessage } from '@langchain/core/messages';
+
+function baseState(overrides: any = {}) {
+  return {
+    questions: [{ id: 'q1', questionText: 'What is JS?', keyPoints: ['point1'], dimension: 'llm' }],
+    currentQuestionIndex: 0,
+    shouldFollowUp: false,
+    language: 'en',
+    ...overrides,
+  } as any;
+}
+
+describe('interviewerNode', () => {
+  describe('empty questions handling', () => {
+    it('should return apology message when questions array is empty', async () => {
+      const state = baseState({ questions: [] });
+      const result = await interviewerNode(state);
+      expect(result.messages).toBeDefined();
+      expect((result.messages as any)[0].content).toContain("sorry");
+    });
+
+    it('should return apology message when questions is undefined', async () => {
+      const state = baseState({ questions: undefined });
+      const result = await interviewerNode(state);
+      expect(result.messages).toBeDefined();
+      expect((result.messages as any)[0].content).toContain("sorry");
+    });
+
+    it('should return Chinese apology when language is zh', async () => {
+      const state = baseState({ questions: [], language: 'zh' });
+      const result = await interviewerNode(state);
+      expect((result.messages as any)[0].content).toContain('抱歉');
+    });
+
+    it('should return Japanese apology when language is ja', async () => {
+      const state = baseState({ questions: [], language: 'ja' });
+      const result = await interviewerNode(state);
+      expect((result.messages as any)[0].content).toContain('申し訳');
+    });
+  });
+
+  describe('question index range checks', () => {
+    it('should return shouldFollowUp: false when currentQuestionIndex >= questions.length', async () => {
+      const state = baseState({ currentQuestionIndex: 5, questions: [{ id: 'q1', questionText: 'Q', keyPoints: ['k'], dimension: 'llm' }] });
+      const result = await interviewerNode(state);
+      expect(result.shouldFollowUp).toBe(false);
+    });
+  });
+
+  describe('standard question presentation', () => {
+    it('should present the current question', async () => {
+      const result = await interviewerNode(baseState());
+      expect(result.messages).toBeDefined();
+      const msg = (result.messages as any)[0].content as string;
+      expect(msg).toContain('Question 1');
+      expect(msg).toContain('What is JS?');
+    });
+
+    it('should include answer instruction', async () => {
+      const result = await interviewerNode(baseState());
+      const msg = (result.messages as any)[0].content as string;
+      expect(msg).toContain('answer');
+    });
+
+    it('should use Chinese labels when language is zh', async () => {
+      const state = baseState({ language: 'zh' });
+      const result = await interviewerNode(state);
+      const msg = (result.messages as any)[0].content as string;
+      expect(msg).toContain('问题');
+      expect(msg).toContain('回答');
+    });
+
+    it('should use Japanese labels when language is ja', async () => {
+      const state = baseState({ language: 'ja' });
+      const result = await interviewerNode(state);
+      const msg = (result.messages as any)[0].content as string;
+      expect(msg).toContain('質問');
+      expect(msg).toContain('回答');
+    });
+  });
+
+  describe('follow-up mode', () => {
+    it('should include feedback in follow-up prompt', async () => {
+      const state = baseState({
+        shouldFollowUp: true,
+        feedbackHistory: [new AIMessage('Feedback: You need more details')],
+      });
+      const result = await interviewerNode(state);
+      const msg = (result.messages as any)[0].content as string;
+      expect(msg).toContain('Follow-up');
+      expect(msg).toContain('You need more details');
+    });
+
+    it('should reset shouldFollowUp to false after processing', async () => {
+      const state = baseState({
+        shouldFollowUp: true,
+        feedbackHistory: [new AIMessage('Feedback: More info needed')],
+      });
+      const result = await interviewerNode(state);
+      expect(result.shouldFollowUp).toBe(false);
+    });
+  });
+});