Structure Web Application Framework
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 

107 lines
4.6 KiB

import Pagination from "../src/Pagination";
describe('Pagination', () => {
const pagination = new Pagination(3, 5, 31);
test('Should have correct page', () => {
expect(pagination.page).toBe(3);
});
test('Should have correct perPage', () => {
expect(pagination.perPage).toBe(5);
});
test('Should have correct totalCount', () => {
expect(pagination.totalCount).toBe(31);
});
test('Should calculate correct last page', () => {
expect(new Pagination(3, 5, 30).lastPage).toBe(6);
expect(new Pagination(3, 5, 31).lastPage).toBe(7);
expect(new Pagination(3, 5, 32).lastPage).toBe(7);
expect(new Pagination(3, 5, 34).lastPage).toBe(7);
expect(new Pagination(3, 5, 35).lastPage).toBe(7);
expect(new Pagination(3, 5, 36).lastPage).toBe(8);
});
test('Should properly tell whether has a previous page', () => {
expect(pagination.hasPrevious()).toBe(true);
expect(new Pagination(1, 5, 15).hasPrevious()).toBe(false);
expect(new Pagination(2, 5, 15).hasPrevious()).toBe(true);
expect(new Pagination(3, 5, 15).hasPrevious()).toBe(true);
expect(new Pagination(1, 5, 17).hasPrevious()).toBe(false);
expect(new Pagination(2, 5, 17).hasPrevious()).toBe(true);
expect(new Pagination(3, 5, 17).hasPrevious()).toBe(true);
expect(new Pagination(4, 5, 17).hasPrevious()).toBe(true);
});
test('Should properly tell whether has a next page', () => {
expect(pagination.hasPrevious()).toBe(true);
expect(new Pagination(1, 5, 15).hasNext()).toBe(true);
expect(new Pagination(2, 5, 15).hasNext()).toBe(true);
expect(new Pagination(3, 5, 15).hasNext()).toBe(false);
expect(new Pagination(1, 5, 17).hasNext()).toBe(true);
expect(new Pagination(2, 5, 17).hasNext()).toBe(true);
expect(new Pagination(3, 5, 17).hasNext()).toBe(true);
expect(new Pagination(4, 5, 17).hasNext()).toBe(false);
});
test('Should throw on out of bound creation attempt', () => {
expect(() => {
new Pagination(-1, 5, 15);
}).toThrow('Page -1 not found.');
expect(() => {
new Pagination(-20, 5, 15);
}).toThrow('Page -20 not found.');
expect(() => {
new Pagination(3, 5, 15);
}).not.toThrow();
expect(() => {
new Pagination(4, 5, 15);
}).toThrow('Page 4 not found.');
expect(() => {
new Pagination(20, 5, 15);
}).toThrow('Page 20 not found.');
});
test('Should generate proper previous pages with context', () => {
expect(new Pagination(1, 1, 100).previousPages(1)).toStrictEqual([]);
expect(new Pagination(1, 1, 100).previousPages(2)).toStrictEqual([]);
expect(new Pagination(1, 1, 100).previousPages(3)).toStrictEqual([]);
expect(new Pagination(2, 1, 100).previousPages(1)).toStrictEqual([1]);
expect(new Pagination(2, 1, 100).previousPages(2)).toStrictEqual([1]);
expect(new Pagination(2, 1, 100).previousPages(3)).toStrictEqual([1]);
expect(new Pagination(3, 1, 100).previousPages(1)).toStrictEqual([1, 2]);
expect(new Pagination(3, 1, 100).previousPages(2)).toStrictEqual([1, 2]);
expect(new Pagination(3, 1, 100).previousPages(3)).toStrictEqual([1, 2]);
expect(new Pagination(10, 1, 100).previousPages(1)).toStrictEqual([1, -1, 9]);
expect(new Pagination(10, 1, 100).previousPages(2)).toStrictEqual([1, 2, -1, 8, 9]);
expect(new Pagination(10, 1, 100).previousPages(3)).toStrictEqual([1, 2, 3, -1, 7, 8, 9]);
});
test('Should generate proper next pages with context', () => {
let pagination = new Pagination(100, 1, 100);
expect(pagination.nextPages(1)).toStrictEqual([]);
expect(pagination.nextPages(2)).toStrictEqual([]);
expect(pagination.nextPages(3)).toStrictEqual([]);
pagination = new Pagination(99, 1, 100);
expect(pagination.nextPages(1)).toStrictEqual([100]);
expect(pagination.nextPages(2)).toStrictEqual([100]);
expect(pagination.nextPages(3)).toStrictEqual([100]);
pagination = new Pagination(98, 1, 100);
expect(pagination.nextPages(1)).toStrictEqual([99, 100]);
expect(pagination.nextPages(2)).toStrictEqual([99, 100]);
expect(pagination.nextPages(3)).toStrictEqual([99, 100]);
pagination = new Pagination(90, 1, 100);
expect(pagination.nextPages(1)).toStrictEqual([91, -1, 100]);
expect(pagination.nextPages(2)).toStrictEqual([91, 92, -1, 99, 100]);
expect(pagination.nextPages(3)).toStrictEqual([91, 92, 93, -1, 98, 99, 100]);
});
});