const expect = (is) => {
	if(!is)
		throw new Error('expected not done');
}
const {pool} = require('../src/background/mysql')
const forBigTable = require('../src/background/forBigTable')

describe("big table for check", () => {
	let sphinx;

	it("init", function() {
		sphinx = pool()
		expect(sphinx)
	})

	it("insert 13 records for big table check", async function() {
		for(let i = 1; i < 14; i++)
			await sphinx.query(`insert into feed(id, data) values(${i}, 'a')`)
	})

	it("for each 3 records of big table", async function() {
		const records = []
		await forBigTable(sphinx, 'feed', record => records.push(record), null, 3)
		expect(records.length === 13)
	})

	it("for each 13 records of big table", async function() {
		const records = []
		await forBigTable(sphinx, 'feed', record => records.push(record), null, 13)
		expect(records.length === 13)
		expect(records[1].id === 2)
	})

	it("for each 15 records of big table", async function() {
		const records = []
		await forBigTable(sphinx, 'feed', record => records.push(record), null, 15)
		expect(records.length === 13)
	})
});