JS1-week4 | implement folder: repeat.test.js

week-4/implement/repeat.test.js

@@ -23,3 +23,44 @@
 // 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.
+
+function repeat(str, count) {
+  if (typeof str !== "string") {
+    throw new Error("The first parameter must be a string!");
+  }
+
+  if (typeof count !== "number") {
+    throw new Error("The second parameter must be a number!");
+  }
+
+  if (Number.isInteger(count) !== true || count < 0) {
+    throw new Error("Count must be a positive integer!");
+  }
+
+  let result = "";
+  for (let i = 0; i < count; i++) {
+    result += str;
+  }
+
+  return result;
+}
+
+test("repeats given string count times", function () {
+  expect(repeat("Hi", 3)).toBe("HiHiHi");
+  expect(repeat("Hi", 1)).toBe("Hi");
+  expect(repeat("Hi", 0)).toBe("");
+  expect(() => repeat(3, 3)).toThrow("The first parameter must be a string!");
+  expect(() => repeat("Hi", true)).toThrow(
+    "The second parameter must be a number!"
+  );
+  expect(() => repeat("Hi", -3)).toThrow("Count must be a positive integer!");
+  expect(() => repeat("Hi", 1.5)).toThrow("Count must be a positive integer!");
+});
+
+// console.log(repeat("Hi", 3));
+// console.log(repeat("Hi", 1));
+// console.log(repeat("Hi", 0));
+// console.log(repeat("Hi", -3));
+// console.log(repeat("Hi", 1.5));
+// console.log(repeat(3, 3));
+// console.log(repeat("Hi", true));