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length_test.js
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length_test.js
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import ArrayProxy from '../../../lib/system/array_proxy';
import EmberObject from '../../../lib/system/object';
import { observer } from 'ember-metal';
import { oneWay as reads, not } from '@ember/object/computed';
import { A as a } from '../../../lib/mixins/array';
import { moduleFor, AbstractTestCase } from 'internal-test-helpers';
import { set, get } from 'ember-metal';
moduleFor(
'Ember.ArrayProxy - content change (length)',
class extends AbstractTestCase {
['@test should update length for null content'](assert) {
let proxy = ArrayProxy.create({
content: a([1, 2, 3]),
});
assert.equal(proxy.get('length'), 3, 'precond - length is 3');
proxy.set('content', null);
assert.equal(proxy.get('length'), 0, 'length updates');
}
['@test should update length for null content when there is a computed property watching length'](
assert
) {
let proxy = ArrayProxy.extend({
isEmpty: not('length'),
}).create({
content: a([1, 2, 3]),
});
assert.equal(proxy.get('length'), 3, 'precond - length is 3');
// Consume computed property that depends on length
proxy.get('isEmpty');
// update content
proxy.set('content', null);
assert.equal(proxy.get('length'), 0, 'length updates');
}
['@test getting length does not recompute the object cache'](assert) {
let indexes = [];
let proxy = ArrayProxy.extend({
objectAtContent(index) {
indexes.push(index);
return this.content[index];
},
}).create({
content: a([1, 2, 3, 4, 5]),
});
assert.equal(get(proxy, 'length'), 5);
assert.deepEqual(indexes, []);
indexes.length = 0;
proxy.set('content', a([6, 7, 8]));
assert.equal(get(proxy, 'length'), 3);
assert.deepEqual(indexes, []);
indexes.length = 0;
proxy.content.replace(1, 0, [1, 2, 3]);
assert.equal(get(proxy, 'length'), 6);
assert.deepEqual(indexes, []);
}
'@test accessing length after content set to null'(assert) {
let obj = ArrayProxy.create({ content: ['foo', 'bar'] });
assert.equal(obj.length, 2, 'precond');
set(obj, 'content', null);
assert.equal(obj.length, 0, 'length is 0 without content');
assert.deepEqual(obj.content, null, 'content was updated');
}
'@test accessing length after content set to null in willDestroy'(assert) {
let obj = ArrayProxy.extend({
willDestroy() {
this.set('content', null);
this._super(...arguments);
},
}).create({
content: ['foo', 'bar'],
});
assert.equal(obj.length, 2, 'precond');
this.runTask(() => obj.destroy());
assert.equal(obj.length, 0, 'length is 0 without content');
assert.deepEqual(obj.content, null, 'content was updated');
}
'@test setting length to 0'(assert) {
let obj = ArrayProxy.create({ content: ['foo', 'bar'] });
assert.equal(obj.length, 2, 'precond');
set(obj, 'length', 0);
assert.equal(obj.length, 0, 'length was updated');
assert.deepEqual(obj.content, [], 'content length was truncated');
}
'@test setting length to smaller value'(assert) {
let obj = ArrayProxy.create({ content: ['foo', 'bar'] });
assert.equal(obj.length, 2, 'precond');
set(obj, 'length', 1);
assert.equal(obj.length, 1, 'length was updated');
assert.deepEqual(obj.content, ['foo'], 'content length was truncated');
}
'@test setting length to larger value'(assert) {
let obj = ArrayProxy.create({ content: ['foo', 'bar'] });
assert.equal(obj.length, 2, 'precond');
set(obj, 'length', 3);
assert.equal(obj.length, 3, 'length was updated');
assert.deepEqual(obj.content, ['foo', 'bar', undefined], 'content length was updated');
}
'@test setting length after content set to null'(assert) {
let obj = ArrayProxy.create({ content: ['foo', 'bar'] });
assert.equal(obj.length, 2, 'precond');
set(obj, 'content', null);
assert.equal(obj.length, 0, 'length was updated');
set(obj, 'length', 0);
assert.equal(obj.length, 0, 'length is still updated');
}
'@test setting length to greater than zero'(assert) {
let obj = ArrayProxy.create({ content: ['foo', 'bar'] });
assert.equal(obj.length, 2, 'precond');
set(obj, 'length', 1);
assert.equal(obj.length, 1, 'length was updated');
assert.deepEqual(obj.content, ['foo'], 'content length was truncated');
}
['@test array proxy + aliasedProperty complex test'](assert) {
let aCalled, bCalled, cCalled, dCalled, eCalled;
aCalled = bCalled = cCalled = dCalled = eCalled = 0;
let obj = EmberObject.extend({
colors: reads('model'),
length: reads('colors.length'),
a: observer('length', () => aCalled++),
b: observer('colors.length', () => bCalled++),
c: observer('colors.content.length', () => cCalled++),
d: observer('colors.[]', () => dCalled++),
e: observer('colors.content.[]', () => eCalled++),
}).create();
obj.set(
'model',
ArrayProxy.create({
content: a(['red', 'yellow', 'blue']),
})
);
assert.equal(obj.get('colors.content.length'), 3);
assert.equal(obj.get('colors.length'), 3);
assert.equal(obj.get('length'), 3);
assert.equal(aCalled, 1, 'expected observer `length` to be called ONCE');
assert.equal(bCalled, 1, 'expected observer `colors.length` to be called ONCE');
assert.equal(cCalled, 1, 'expected observer `colors.content.length` to be called ONCE');
assert.equal(dCalled, 1, 'expected observer `colors.[]` to be called ONCE');
assert.equal(eCalled, 1, 'expected observer `colors.content.[]` to be called ONCE');
obj.get('colors').pushObjects(['green', 'red']);
assert.equal(obj.get('colors.content.length'), 5);
assert.equal(obj.get('colors.length'), 5);
assert.equal(obj.get('length'), 5);
assert.equal(aCalled, 2, 'expected observer `length` to be called TWICE');
assert.equal(bCalled, 2, 'expected observer `colors.length` to be called TWICE');
assert.equal(cCalled, 2, 'expected observer `colors.content.length` to be called TWICE');
assert.equal(dCalled, 2, 'expected observer `colors.[]` to be called TWICE');
assert.equal(eCalled, 2, 'expected observer `colors.content.[]` to be called TWICE');
}
}
);