add pagequeryconverter tests, and check/query in pagequeryconverter

helpers/pagequeryconverter.js

@@ -1,6 +1,7 @@
 'use strict';
 
 module.exports = (query, limit) => {
+	query = query || {};
 	const nopage = { ...query };
 	delete nopage.page;
 	const queryString = new URLSearchParams(nopage).toString();

helpers/pagequeryconverter.test.js

@@ -0,0 +1,23 @@
+const pageQueryConverter = require('./pagequeryconverter.js');
+const limit = 30;
+
+describe('page query converter', () => {
+	const cases = [
+		{ in: null, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { }, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { page: [1, 2, 3] }, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { page: "test" }, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { page: null }, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { page: -1 }, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { page: 0 }, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { page: 1 }, out: { offset: 0, "queryString": "", page: 1 } },
+		{ in: { page: 5 }, out: { offset: limit*4, "queryString": "", page: 5 } },
+		{ in: { page: 10, other: "test" }, out: { offset: limit*9, "queryString": "other=test", page: 10 } },
+		{ in: { other: "test" }, out: { offset: 0, "queryString": "other=test", page: 1 } },
+	];
+	for(let i in cases) {
+		test(`should contain ${cases[i].out} for an input of ${cases[i].in}`, () => {
+			expect(pageQueryConverter(cases[i].in, limit)).toStrictEqual(cases[i].out)
+		});
+	}
+});