repeat-str tests

Author: RaihanSharif

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

@@ -1,5 +1,18 @@
-function repeatStr() {
-  return "hellohellohello";
+function repeatStr(str, count) {
+  if (count < 0) {
+    throw new Error("invalid input: negative number");
+  }
+  if (count === 1) {
+    return str;
+  }
+
+  if (count === 0) {
+    return "";
+  }
+
+  if (count > 1) {
+    return str.repeat(count);
+  }
 }
 
 module.exports = repeatStr;

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

@@ -8,8 +8,7 @@ const repeatStr = require("./repeat-str");
 // Given a target string `str` and a positive integer `count` greater than 1,
 // When the repeatStr function is called with these inputs,
 // Then it should return a string that contains the original `str` repeated `count` times.
-
-test("should repeat the string count times", () => {
+test("should repeat the string 3 times", () => {
   const str = "hello";
   const count = 3;
   const repeatedStr = repeatStr(str, count);
@@ -20,13 +19,30 @@ test("should repeat the string count times", () => {
 // Given a target string `str` and a `count` equal to 1,
 // When the repeatStr function is called with these inputs,
 // Then it should return the original `str` without repetition.
+test("should not repeat string with a count of 1", () => {
+  const str = "hello";
+  const count = 1;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("hello");
+});
 
 // Case: Handle count of 0:
 // Given a target string `str` and a `count` equal to 0,
 // When the repeatStr function is called with these inputs,
 // Then it should return an empty string.
+test("should return empty string with a count of 0", () => {
+  const str = "hello";
+  const count = 0;
+  const repeatedStr = repeatStr(str, count);
+  expect(repeatedStr).toEqual("");
+});
 
 // Case: Handle negative count:
 // Given a target string `str` and a negative integer `count`,
 // When the repeatStr function is called with these inputs,
 // Then it should throw an error, as negative counts are not valid.
+test("should throw error when count < 0", () => {
+  const str = "hello";
+  const count = -2;
+  expect(() => repeatStr(str, count)).toThrow();
+});