test.js

const findStudentScoreByName = require("../src/solution");
const expect = require("chai").expect;



describe("Checking equality", () => {
  it("should return a student score if the name matches", () => {
    const students = [
        { name: "Leo Yeon-Joo", score: 8.9 },
        { name: "Morgan Sutton", score: 7.4 },
        { name: "Natalee Vargas", score: 9.2 },
      ];
    const expected = students[0].score;
    const existedStudent = "Leo Yeon-Joo";
    const actual = findStudentScoreByName(students, existedStudent);
    
    expect(expected).to.equal(actual);
  });
  
  it("should not return a student score if the name matches", () => {
    const students = [
        { name: "Leo Yeon-Joo", score: 8.9 },
        { name: "Morgan Sutton", score: 7.4 },
        { name: "Natalee Vargas", score: 9.2 },
      ];

    const nonExistedStudent = "Foo Bar";
    const actual = findStudentScoreByName(students, nonExistedStudent);
    
    expect(null).to.equal(actual);
  });
});

function findStudentScoreByName(students, name) {
  for (let i=0; i<students.length; i++){
    if(students[i].name===name){
      return students[i].score;
    }
  } 
  return null;
}