Add tests for demo

server/question-service/routes/questionRoute.test.js

@@ -1,39 +1,181 @@
-
-test('placeholder test', () => {
-    expect(true).toBe(true)
-})
+const request = require("supertest");
+const express = require("express");
+const questionRoute = require("./questionRoute");
+const Question = require("../model/questionModel");
+jest.mock("../model/questionModel");
+
+const app = express();
+app.use(express.json());
+app.use(express.urlencoded({ extended: false }));
+app.use("/", questionRoute);
+
+afterEach(() => {
+  jest.clearAllMocks();
+});
+
+const sampleQuestion1 = {
+  title: "Sample Question 1",
+  description: "Sample description",
+  categories: "Strings, Data Structures",
+  complexity: "Medium",
+  link: "localhost",
+};
+const sampleQuestion2 = {
+  title: "Sample Question 2",
+  description: "Lorem Ipsum",
+  categories: "Algorithms",
+  complexity: "Hard",
+  link: "localhost",
+};
 
 describe("GET /", () => {
-    it('should return all questions', () => {
-
-    });
-})
-
+  it("should return all questions with status 200", async () => {
+    Question.find.mockResolvedValue([sampleQuestion1]);
+    const res = await request(app).get("/");
+    expect(res.status).toBe(200);
+    expect(res.body).toEqual([sampleQuestion1]);
+  });
+
+  it("should handle errors with status 500", async () => {
+    Question.find.mockRejectedValue(new Error("Error"));
+    const res = await request(app).get("/");
+    expect(res.status).toBe(500);
+    expect(res.body.message).toBe("Error");
+  });
+});
 
 describe("GET /:id", () => {
-
-})
-
+  it("should return question with the right ID with status 200", async () => {
+    Question.findById.mockImplementation(async (id) =>
+      id == 123 ? sampleQuestion1 : sampleQuestion2
+    );
+    const res = await request(app).get("/123");
+    expect(res.status).toEqual(200);
+    expect(res.body).toEqual(sampleQuestion1);
+  });
+
+  it("should handle errors with status 500", async () => {
+    Question.findById.mockRejectedValue(new Error("Error"));
+    const res = await request(app).get("/123");
+    expect(res.status).toBe(500);
+    expect(res.body.message).toBe("Error");
+  });
+});
 
 describe("GET /categories/unique", () => {
-
-})
-
-describe("GET /complexity/___", () => {
-
-// get easy
-
-
-// get medium
-
-
-// get hard
-})
-
-
-
-// create question
-// post add
-// put id
-
-// delete question
+  it("should return unique categories with status 200", async () => {
+    const uniqueCategories = ["A", "B"];
+    Question.aggregate.mockResolvedValue(uniqueCategories);
+    const res = await request(app).get("/categories/unique");
+    expect(res.status).toBe(200);
+    expect(res.body).toEqual(uniqueCategories);
+  });
+
+  it("should handle errors with status 500", async () => {
+    Question.aggregate.mockRejectedValue(new Error("Error"));
+    const res = await request(app).get("/categories/unique");
+    expect(res.status).toBe(500);
+    expect(res.body.message).toBe("Error");
+  });
+});
+
+
+describe("POST /add", () => {
+  it("should create a new question with status 200", async () => {
+    Question.findOne.mockReturnValue({ exec: jest.fn().mockResolvedValue(null) });
+    Question.mockReturnValue({
+      ...sampleQuestion1,
+      save: jest.fn().mockResolvedValue(sampleQuestion1),
+    });
+    const res = await request(app)
+      .post("/add")
+      .send(sampleQuestion1)
+      .set("Content-Type", "application/json")
+      .set("Accept", "application/json");
+    expect(res.status).toBe(200);
+    expect(res.body).toEqual(sampleQuestion1);
+  });
+
+  it("should return 400 if question already exists", async () => {
+    Question.findOne.mockReturnValue({
+      exec: jest.fn().mockResolvedValue({
+        ...sampleQuestion1,
+      }),
+    });
+    const res = await request(app)
+      .post("/add")
+      .send(sampleQuestion1)
+      .set("Content-Type", "application/json")
+      .set("Accept", "application/json");
+    expect(res.status).toBe(400);
+    expect(res.text).toBe(`Question with the title "${sampleQuestion1.title}" already exists.`);
+  });
+
+  it("should handle errors with status 500", async () => {
+    Question.findOne.mockReturnValue({ exec: jest.fn().mockResolvedValue(null) });
+    Question.mockReturnValue({
+      ...sampleQuestion1,
+      save: jest.fn().mockRejectedValue(new Error("Error")),
+    });
+    const res = await request(app)
+      .post("/add")
+      .send(sampleQuestion1)
+      .set("Content-Type", "application/json")
+      .set("Accept", "application/json, text/html");
+    expect(res.status).toBe(500);
+  });
+});
+
+describe("PUT /:id", () => {
+  const updatedQuestion = {
+    title: "Updated Question",
+    description: "",
+    categories: "",
+    complexity: "",
+    link: "",
+  };
+
+  it("should update a question by ID with status 200", async () => {
+    Question.findById.mockResolvedValue({ save: jest.fn().mockResolvedValue(updatedQuestion) });
+    const res = await request(app).put("/123").send(updatedQuestion);
+    expect(res.status).toBe(200);
+    expect(res.body).toEqual(updatedQuestion);
+  });
+
+  it("should return 404 if question not found", async () => {
+    Question.findById.mockResolvedValue(null);
+    const res = await request(app).put("/123").send(updatedQuestion);
+    expect(res.status).toBe(404);
+    expect(res.body.message).toBe("Question not found");
+  });
+
+  it("should handle errors with status 500", async () => {
+    Question.findById.mockRejectedValue(new Error("Update error"));
+    const res = await request(app).put("/123").send(updatedQuestion);
+    expect(res.status).toBe(500);
+    expect(res.body.message).toBe("Update error");
+  });
+});
+
+describe("DELETE /:id", () => {
+  it("should delete a question by ID with status 200", async () => {
+    Question.findByIdAndDelete.mockResolvedValue({ _id: "123" });
+    const res = await request(app).delete("/123");
+    expect(res.status).toBe(200);
+    expect(res.body.message).toBe("Question deleted successfully");
+  });
+
+  it("should return 404 if question not found", async () => {
+    Question.findByIdAndDelete.mockResolvedValue(null);
+    const res = await request(app).delete("/123");
+    expect(res.status).toBe(404);
+    expect(res.body.message).toBe("Question not found");
+  });
+
+  it("should handle errors with status 500", async () => {
+    Question.findByIdAndDelete.mockRejectedValue(new Error("Delete error"));
+    const res = await request(app).delete("/123");
+    expect(res.status).toBe(500);
+    expect(res.body.message).toBe("Delete error");
+  });
+});