alasql/test/test142.js

AlaSQL.js - JavaScript SQL database library for relational and graph data manipulation with support of localStorage, IndexedDB, and Excel

if(typeof exports === 'object') {
	var assert = require("assert");
	var alasql = require('..');
} else {
	__dirname = '.';
};

describe('Test 142 INSTREAM', function() {

	it("1. Source as a string", function(done){
		alasql('CREATE DATABASE test142; use test142');
		done();
	});

	it("2. Simple Date functions", function(done){

		var srcfn = function(i) {
			if(i>2) return;
			return {i:i, i2:i*2};
		};

//		srcfn.length = 3;

		var res = alasql('SELECT * FROM ?', [srcfn]);
//		console.log(res);
		assert.deepEqual(res, [{i:0,i2:0},{i:1,i2:2},{i:2,i2:4}]);

		done();
	});
	it("3. Calculate PI with streaming function", function(done){
		var n = 10000;

		var rndfn = function(i) {
			if(i>=n) return; // EOF
			return {x:Math.random(), y:Math.random()};
		};
		rndfn.dontcache = true;

//		rndfn.length = 100;

//		alasql.stdlib.SQRT = function(s) {return 'Math.sqrt('+s+')'};
	var tm = Date.now();
		var res = alasql('SELECT VALUE COUNT(*) FROM ? WHERE SQRT(x*x+y*y)<1', [rndfn]);
//		console.log(Date.now() - tm);
		var pi = res/n*4;
//		console.log(res,pi);
		assert( 2 < pi && pi < 4);

		done();
	});
/*
	it("4. Calculate PI", function(done){




		var vtab = "ABCDEF\tsdfsdfsd\ndjlskjd\tsddsf\nsdsdffsd\tsddsfsd";
		alasql("select [0], LEN([0]) from tab(?) where [1] like '%sd%'",[vtab]);

		var vcsv = "1,2,3\n2,3,4\n6,5,3";
		alasql("select [0], LEN([0]) from csv(?) where [1] like '%sd%'",[vcsv]);

// Connect to other database
		alasql("select [0], LEN([0]) from alasql(SELECT * FROM one) where [1] like '%sd%'")		

if(false) {

		alasql("select INTO ?",[fn]);
// include xls
// tab.datafn = function() { return all};
// tab.length = 10;
// tab.defineProperty = '';
// unnn.start();
// vat i = 0;
// var ilen = 10000000000; // Security brake
// if(unnn.init) unnn.init();
// if(unnn.length) ilen = unnn.length;
// while( (unnn.get && d = unnn.get(i)) || (i<ilen) {} ; - instead for(i) - cyc
// getrow();
// srcfn.getAll();
// srcfn.prepare();

// srcfn.length;
// Can be not object
// var xls = new alasql.InStream(1,2,3,4) {
//   aassa
//};
// xls.length = 10;

		$.get({}).then(function(data){
			var vxls = {};
			alasql("select [0], LEN([0]) from xls(?) where [1] like '%sd%'",[vxls]);
		});

		var xls = function(data,args,i) {
			return ;
		};
		alasql.instream.xls = xls;
};

		done();
	});
/*
	it("3. AGGR functions", function(done){
		var res = alasql('SELECT SUM(x) AS x, SUM(y) AS y, AGGR(x/y) AS z FROM ? WHERE SQRT(x*x+y*y)<1', [rndfn]);
		console.log(res);
		assert( 0.5 < res[0].z && res[0].z < 2 );
		done();
	});

	it("4. Output stream", function(done){
		rndfn.length = 3;
		var outfn = function(data) {
			console.log(data);
		};
		var res = alasql('SELECT x, y INTO ? FROM ? WHERE SQRT(x*x+y*y)<1', [outfn,rndfn]);
		console.log(res);
		done();
	});

	it("4. Output stream with groups", function(done){
		var res = alasql('SELECT COUNT(*) AS n, SUM(x) AS x, SUM(y) AS y INTO ? AS z FROM ? WHERE SQRT(x*x+y*y)<1', [outfn,rndfn]);
		console.log(res);
		done();
	});


*/
	it("99. Drop database", function(done){
		alasql('DROP DATABASE test142');
		done();
	});
});