alasql/test/test001.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('..');
};

function prepareData (defined) {

//	alasql('create database test01');
//	alasql('use test01');

	var studentsData = [
		{studentid:58,studentname:'Sarah Patrik',courseid:1, startdate: new Date(2014,0,10), amt:10, schoolid:1},
		{studentid:102,studentname:'John Stewart', courseid:2, startdate: new Date(2014,0,20), amt:20, schoolid:1},
		{studentid:102,studentname:'Joan Blackmore', courseid:2, startdate: new Date(2014,0,20), amt:20, schoolid:1},
		{studentid:104,studentname:'Anna Wooden', courseid:4, startdate: new Date(2014,0,15), amt:30, schoolid:2},
		{studentid:104,studentname:'Astrid Carlson', courseid:7, startdate: new Date(2014,0,15), amt:30, schoolid:1},
	];

	var coursesData = [
		{courseid:1, coursename: 'first', schoolid:1},
		{courseid:2, coursename: 'second', schoolid:1},
		{courseid:3, coursename: 'third', schoolid:2},
		{courseid:4, coursename: 'fourth', schoolid:2},
		{courseid:5, coursename: 'fifth', schoolid:2}
	];

	var schoolData = [
		{schoolid:1, schoolname: 'Northern School', regionid:'north'},
		{schoolid:2, schoolname: 'Southern School', regionid:'south'},
		{schoolid:3, schoolname: 'Eastern School', regionid:'east'},
		{schoolid:4, schoolname: 'Western School', regionid:'west'},
	];

	if(!defined) {

		alasql.tables.students = {
			data:studentsData,
		};

		alasql.tables.courses = {
			data: coursesData,
		};	

		alasql.tables.schools = {
			data: schoolData,
		};

	} else {

		alasql.tables.students = new alasql.Table ({
			data:studentsData,
			columns:[
				{columnid: 'studentid', dbtypeid:'INT'}, 
				{columnid: 'studentname', dbtypeid: 'STRING'}, 
				{columnid: 'courseid'},
				{columnid: 'schoolid'},
				{columnid: 'startdate', dbtypeid: 'DATE'},
				{columnid: 'amt', dbtypeid: 'MONEY'}
			]
		});

		alasql.tables.students.indexColumns();

		alasql.tables.courses = new alasql.Table({
			data: coursesData,
			columns: [
				{columnid: 'courseid', dbtypeid:'INT'}, 
				{columnid: 'coursename', dbtypeid: 'STRING'}, 
				{columnid: 'schoolid'},
			]
		});

		alasql.tables.courses.indexColumns();

		alasql.tables.schools = new alasql.Table ({
			data: schoolData,
			columns: [
				{columnid: 'schoolid', dbtypeid:'INT'}, 
				{columnid: 'schoolname', dbtypeid: 'STRING'}, 
				{columnid: 'regionid'},
			]
		});

		alasql.tables.schools.indexColumns('schools');
	}
};


	
	function doTests() {
		it('Select 1.1: COUNT', function(done){
		 	var res = alasql('SELECT courses.courseid, COUNT(*) AS cnt '+
		 		' FROM students RIGHT JOIN courses USING courseid GROUP BY courses.courseid ORDER BY courseid' );
		 	assert.deepEqual([ 
		 		{ courseid: 1, cnt: 1 },
				{ courseid: 2, cnt: 2 },
				{ courseid: 3, cnt: 1 },
				{ courseid: 4, cnt: 1 },
				{ courseid: 5, cnt: 1 } ], res);
		 	done();
		});
		it('Select 1.2: LEFT JOIN ON ', function(done){
			var res = alasql('SELECT * '+
				' FROM students '+
				' LEFT JOIN courses ON students.courseid = courses.courseid AND students.schoolid = courses.schoolid'+
				' LEFT JOIN schools ON students.schoolid = schools.schoolid '+
				' GROUP BY students.schoolid, students.courseid, students.studentname' );
//			console.log(res);
			assert.equal(res[4].studentname,'Astrid Carlson');
			done();
		});
		it('Select 1.3: LEFT JOIN', function(done){
			var res = alasql('SELECT COLUMN students.schoolid '+
				' FROM students '+
				' LEFT JOIN courses USING courseid'
			);
			assert.deepEqual([1,1,1,2,1], res);
			done();
		});
		it('Select 1.4: queryValue', function(done){
			var res = alasql('SELECT VALUE COUNT(*) FROM courses, students');
			assert.equal(25,res);
			done();
		});
//		alasql('drop database test01');
	};

describe('Test 001', function() {

	describe('Columns provided', function() {
		prepareData(true);
		doTests();
	});

	describe('Columns are not provided', function() {
		prepareData(false);
		doTests();
	});

});