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arrays.js
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arrays.js
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var _ = require('lodash');
var expect = require('chai').expect;
var $observe = require('../src/obsvr');
describe('$observe - arrays', function() {
it('should detect simple array value setting', function() {
var scope = {
arr: [1, 2, 3],
};
var calledKeys = {};
var changes = [];
var observer = $observe(scope, 'arr')
.on('path', (k, v) => calledKeys[k] = true)
.on('change', v => changes.push(_.cloneDeep(v)))
scope.arr[0] = 12;
observer.check();
scope.arr[2] = 34;
scope.arr[1] = 21;
observer.check();
expect(changes).to.be.deep.equal([
[12, 2, 3],
[12, 21, 34],
]);
});
it('should detect array inserts - splice, push, shift', function() {
var scope = {
arr: [10, 23, 35],
};
var calledPaths = {};
var changes = [];
var observer = $observe(scope, 'arr')
.on('path', (k, v) => calledPaths[k] = true)
.on('change', v => changes.push(_.cloneDeep(v)))
scope.arr.splice(2, 0, 27);
observer.check();
scope.arr.push(47);
observer.check();
expect(changes).to.be.deep.equal([
[10, 23, 27, 35],
[10, 23, 27, 35, 47],
]);
expect(calledPaths).to.be.deep.equal({'': true, 2: true, 3: true, 4: true});
});
it('should detect array removals - pop, shift', function() {
var scope = {
arr: [11, 22, 33, 44],
};
var calledKeys = {};
var changes = [];
var observer = $observe(scope, 'arr')
.on('path', (k, v) => calledKeys[k] = true)
.on('change', v => changes.push(_.cloneDeep(v)))
scope.arr.pop();
observer.check();
scope.arr.shift();
observer.check();
expect(changes).to.be.deep.equal([
[11, 22, 33],
[22, 33],
]);
});
it.skip('should detect delete operations');
});