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index.spec.js
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index.spec.js
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const { evens, odds } = require("./")
describe("Evens function",()=>{
test("should return empty array when input is empty array",()=>{
// given
const input = [];
const expectedResult = [];
// When
const result = evens(input);
// Then
expect(result).toEqual(expectedResult);
});
test("should return the array with one element if the element is even",()=>{
// given
const input = [2];
const expectedResult = [2];
// When
const result = evens(input);
// Then
expect(result).toEqual(expectedResult);
});
test("should return the array with one element if the first element is odd and the second is even",()=>{
// given
const input = [1,2];
const expectedResult = [2];
// When
const result = evens(input);
// Then
expect(result).toEqual(expectedResult);
});
test("should only return Even numbers", () => {
// Given
const input = [1,2,3,4,5,6,7,8,9,10];
const expectedResult = [2,4,6,8,10];
// When
const result = evens(input);
// Then
expect(result).toEqual(expectedResult);
});
});
describe("Odds function",()=>{
test("should return empty array when input is empty array",()=>{
// given
const input = [];
const expectedResult = [];
// When
const result = odds(input);
// Then
expect(result).toEqual(expectedResult);
});
test("should return the array with one element if the element is odd",()=>{
// given
const input = [1];
const expectedResult = [1];
// When
const result = odds(input);
// Then
expect(result).toEqual(expectedResult);
});
test("should return the array with one element if the first element is even and the second is odd",()=>{
// given
const input = [2,3];
const expectedResult = [3];
// When
const result = odds(input);
// Then
expect(result).toEqual(expectedResult);
});
test("should only return Odd numbers", () => {
// Given
const input = [1,2,3,4,5,6,7,8,9,10];
const expectedResult = [1,3,5,7,9];
// When
const result = odds(input);
// Then
expect(result).toEqual(expectedResult);
});
});