Added a route to determine if a year is a leap year or not

routes/routes.js

@@ -194,7 +194,6 @@ router.post('/tech-number', (req, res) => {
     }
 })
 
-
 router.post('/duck-number', (req, res) => {
     let num = req.body.number;
     let flag = false;
@@ -216,5 +215,21 @@ router.post('/duck-number', (req, res) => {
     }
 })
 
-module.exports = router;
+router.post("/leap-year", (req, res) => {
+  let year = req.body.year;
+  let message;
+
+  if (year % 400 === 0) {
+    message = `The year ${year} is a leap year`;
+  } else if (year % 100 === 0) {
+    message = `The year ${year} is not a leap year`;
+  } else if (year % 4 === 0) {
+    message = `The year ${year} is a leap year`;
+  } else {
+    message = `The year ${year} is not a leap year`;
+  }
+
+  res.status(200).send({ message });
+});
 
+module.exports = router;

tests/tests.js

@@ -21,6 +21,35 @@ describe("Starting tests for app.js ->", () => {
         }
       });
   });
+
+  //Add more tests here
+
+  it("Correctly checks if a given year is leap year or not", (done) => {
+    const leapYears = [1912, 1928, 1936, 1948, 1980, 2000, 2012];
+    const nonLeapYears = [1901, 1913, 1926, 1957, 1962, 1978, 1995];
+
+    for (let i = 1; i < 3; i++) {
+      const yearsToCheck = i === 1 ? leapYears : nonLeapYears;
+      for (const year of yearsToCheck) {
+        chai
+          .request(app)
+          .post("/leap-year")
+          .send({ year })
+          .end((err, res) => {
+            if (err) {
+              done(err);
+              process.exit(1);
+            } else {
+              res.body.message.should.equal(
+                `The year ${year} is${i === 1 ? "" : " not"} a leap year`,
+              );
+            }
+          });
+      }
+    }
+
+    done();
+  });
 
   it("To check if /prime endpoint is working", (done) => {
     chai
@@ -41,6 +70,4 @@ describe("Starting tests for app.js ->", () => {
         }
       });
   });
-
-  //Add more tests here
 });