Birmingham | 26-ITP-May | Ogbemi Mene | sprint 3 | 2-practice tdd coursework exercises

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

@@ -1,5 +1,13 @@
 function countChar(stringOfCharacters, findCharacter) {
-  return 5
+  let count = 0;
+
+  for (let i = 0; i < stringOfCharacters.length; i++) {
+    if (stringOfCharacters[i] === findCharacter) {
+      count++;
+    }
+  }
+
+  return count;
 }
 
 module.exports = countChar;

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

@@ -22,3 +22,13 @@ test("should count multiple occurrences of a character", () => {
 // And a character `char` that does not exist within `str`.
 // When the function is called with these inputs,
 // Then it should return 0, indicating that no occurrences of `char` were found.
+
+// to solve this issue, we will implement a test case that checks for the scenario where the character is not found in the string.
+// The test will call the countChar function with a string and a character that does not exist in that string, and it will assert that the returned count is 0.
+//  here is the code for the test case:
+test("should return 0 when character is not found", () => {
+  const str = "hello";
+  const char = "x";
+  const count = countChar(str, char);
+  expect(count).toEqual(0);
+});

Sprint-3/2-practice-tdd/get-ordinal-number.js

@@ -3,3 +3,12 @@ function getOrdinalNumber(num) {
 }
 
 module.exports = getOrdinalNumber;
+// this is a code i came up with to get the ordinal number of a given number. 
+// I will now write tests to check if it works correctly.
+
+function getOrdinalNumber(n) {
+  const pr = new Intl.PluralRules("en-US", { type: "ordinal" });
+  const suffixes = { one: "st", two: "nd", few: "rd", other: "th" };
+  const rule = pr.select(n);
+  return `${n}${suffixes[rule]}`;
+}

Sprint-3/2-practice-tdd/get-ordinal-number.test.js

@@ -18,3 +18,49 @@ test("should append 'st' for numbers ending with 1, except those ending with 11"
   expect(getOrdinalNumber(21)).toEqual("21st");
   expect(getOrdinalNumber(131)).toEqual("131st");
 });
+
+// here are more test cases for different scenarios
+
+const getOrdinalNumber = require("./get-ordinal-number");
+
+describe("getOrdinalNumber", () => {
+  // Case 1: Already defined in your prompt
+  test("should append 'st' for numbers ending with 1, except those ending with 11", () => {
+    expect(getOrdinalNumber(1)).toEqual("1st");
+    expect(getOrdinalNumber(21)).toEqual("21st");
+    expect(getOrdinalNumber(131)).toEqual("131st");
+  });
+
+  // Case 2: Numbers ending with 2 (but not 12)
+  test("should append 'nd' for numbers ending with 2, except those ending with 12", () => {
+    expect(getOrdinalNumber(2)).toEqual("2nd");
+    expect(getOrdinalNumber(22)).toEqual("22nd");
+    expect(getOrdinalNumber(142)).toEqual("142nd");
+  });
+
+  // Case 3: Numbers ending with 3 (but not 13)
+  test("should append 'rd' for numbers ending with 3, except those ending with 13", () => {
+    expect(getOrdinalNumber(3)).toEqual("3rd");
+    expect(getOrdinalNumber(23)).toEqual("23rd");
+    expect(getOrdinalNumber(153)).toEqual("153rd");
+  });
+
+  // Case 4: Numbers ending with 11, 12, 13 (The exceptions)
+  test("should append 'th' for numbers ending in 11, 12, or 13", () => {
+    expect(getOrdinalNumber(11)).toEqual("11th");
+    expect(getOrdinalNumber(12)).toEqual("12th");
+    expect(getOrdinalNumber(13)).toEqual("13th");
+    expect(getOrdinalNumber(111)).toEqual("111th");
+    expect(getOrdinalNumber(112)).toEqual("112th");
+    expect(getOrdinalNumber(113)).toEqual("113th");
+  });
+
+  // Case 5: All other numbers
+  test("should append 'th' for all other numbers", () => {
+    expect(getOrdinalNumber(4)).toEqual("4th");
+    expect(getOrdinalNumber(10)).toEqual("10th");
+    expect(getOrdinalNumber(20)).toEqual("20th");
+    expect(getOrdinalNumber(34)).toEqual("34th");
+    expect(getOrdinalNumber(100)).toEqual("100th");
+  });
+});