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| Eif (typeof (window) === 'undefined') var loki = require('../../src/lokijs.js');
describe('transforms', function () {
beforeEach(function () {
db = new loki('transformTest'),
items = db.addCollection('items');
items.insert({ name : 'mjolnir', owner: 'thor', maker: 'dwarves' });
items.insert({ name : 'gungnir', owner: 'odin', maker: 'elves' });
items.insert({ name : 'tyrfing', owner: 'Svafrlami', maker: 'dwarves' });
items.insert({ name : 'draupnir', owner: 'odin', maker: 'elves' });
});
describe('basic find transform', function() {
it('works', function () {
var tx = [
{
type: 'find',
value: {
owner: 'odin'
}
}
];
var results = items.chain(tx).data();
expect(results.length).toBe(2);
});
});
describe('basic multi-step transform', function() {
it('works', function () {
var tx = [
{
type: 'find',
value: {
owner: 'odin'
}
},
{
type: 'where',
value: function(obj) {
return (obj.name.indexOf("drau") !== -1);
}
}
];
var results = items.chain(tx).data();
expect(results.length).toBe(1);
});
});
describe('parameterized find', function() {
it('works', function () {
var tx = [
{
type: 'find',
value: {
owner: '[%lktxp]OwnerName'
}
}
];
var params = {
OwnerName: 'odin'
}
var results = items.chain(tx, params).data();
expect(results.length).toBe(2);
});
});
describe('parameterized where', function() {
it('works', function () {
var tx = [
{
type: 'where',
value: '[%lktxp]NameFilter'
}
];
var params = {
NameFilter: function(obj) {
return (obj.name.indexOf("nir") !== -1);
}
};
var results = items.chain(tx, params).data();
expect(results.length).toBe(3);
});
});
describe('named find transform', function() {
it('works', function () {
var tx = [
{
type: 'find',
value: {
owner: '[%lktxp]OwnerName'
}
}
];
items.addTransform("OwnerLookup", tx);
var params = {
OwnerName: 'odin'
}
var results = items.chain("OwnerLookup", params).data();
expect(results.length).toBe(2);
});
});
describe('dynamic view named transform', function() {
it('works', function () {
var testColl = db.addCollection('test');
testColl.insert({
a: 'first',
b: 1
});
testColl.insert({
a: 'second',
b: 2
});
testColl.insert({
a: 'third',
b: 3
});
testColl.insert({
a: 'fourth',
b: 4
});
testColl.insert({
a: 'fifth',
b: 5
});
testColl.insert({
a: 'sixth',
b: 6
});
testColl.insert({
a: 'seventh',
b: 7
});
testColl.insert({
a: 'eighth',
b: 8
});
// our view should allow only first 4 test records
var dv = testColl.addDynamicView('lower');
dv.applyFind({ b : {'$lte' : 4 } });
// our transform will desc sort string column as 'third', 'second', 'fourth', 'first',
// and then limit to first two
var tx = [
{
type: 'simplesort',
property: 'a',
desc: true
},
{
type: 'limit',
value: 2
}
];
expect(dv.branchResultset(tx).data().length).toBe(2);
// now store as named (collection) transform and run off dynamic view
testColl.addTransform("desc4limit2", tx);
var results = dv.branchResultset("desc4limit2").data();
expect(results.length).toBe(2);
expect(results[0].a).toBe("third");
expect(results[1].a).toBe("second");
});
});
}); |