repeat function written and tested

Author: zilinskyte

Sprint-3/2-practice-tdd/repeat.js

@@ -1,5 +1,8 @@
-function repeat() {
-  return "hellohellohello";
+function repeat(str, count) {
+  if (!Number.isInteger(count) || count < 0) {
+    throw Error("Invalid count value");
+  }
+  return str.repeat(count);
 }
 
 module.exports = repeat;

Sprint-3/2-practice-tdd/repeat.test.js

@@ -1,5 +1,6 @@
 // Implement a function repeat
 const repeat = require("./repeat");
+
 // Given a target string str and a positive integer count,
 // When the repeat function is called with these inputs,
 // Then it should:
@@ -20,13 +21,32 @@ test("should repeat the string count times", () => {
 // Given a target string str and a count equal to 1,
 // When the repeat function is called with these inputs,
 // Then it should return the original str without repetition, ensuring that a count of 1 results in no repetition.
+test("should return the original string when count is 1", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("hello");
+});
 
 // case: Handle Count of 0:
 // Given a target string str and a count equal to 0,
 // When the repeat function is called with these inputs,
 // Then it should return an empty string, ensuring that a count of 0 results in an empty output.
+test("should return an empty string when count is 0", () => {
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeat(str, count);
+  expect(repeatedStr).toEqual("");
+});
 
 // case: Negative Count:
 // Given a target string str and a negative integer count,
 // When the repeat function is called with these inputs,
 // Then it should throw an error or return an appropriate error message, as negative counts are not valid.
+test("should throw an error for negative count", () => {
+  const str = "hello";
+  const count = -2;
+  expect(() => {
+    repeat(str, count);
+  }).toThrow("Invalid count value");
+});