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feat: add
from-event element modifier`
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,71 @@ | ||
| import Ember from "ember"; | ||
| import { fromEvent } from "rxjs"; | ||
|
|
||
| export default Ember._setModifierManager( | ||
| () => ({ | ||
| createModifier() { | ||
| return { | ||
| subscription: undefined, | ||
| element: undefined | ||
| }; | ||
| }, | ||
|
|
||
| _setupSubscription(state, eventName, operatorOrObserver, maybeObserver) { | ||
| const { element } = state; | ||
| let operator, observer; | ||
|
|
||
| if (operatorOrObserver && maybeObserver) { | ||
| operator = operatorOrObserver; | ||
| observer = maybeObserver; | ||
| } else if (operatorOrObserver && !maybeObserver) { | ||
| observer = operatorOrObserver; | ||
| } | ||
|
|
||
| let observable = fromEvent(element, eventName); | ||
|
|
||
| if (operator) { | ||
| observable = observable.pipe(operator); | ||
| } | ||
|
|
||
| state.subscription = observable.subscribe(observer); | ||
| }, | ||
|
|
||
| installModifier( | ||
| state, | ||
| element, | ||
| { | ||
| positional: [eventName, operatorOrObserver, maybeObserver] | ||
| } | ||
| ) { | ||
| state.element = element; | ||
|
|
||
| this._setupSubscription( | ||
| state, | ||
| eventName, | ||
| operatorOrObserver, | ||
| maybeObserver | ||
| ); | ||
| }, | ||
|
|
||
| updateModifier( | ||
| state, | ||
| { | ||
| positional: [eventName, operatorOrSubscribe, maybeObserver] | ||
| } | ||
| ) { | ||
| state.subscription.unsubscribe(); | ||
|
|
||
| this._setupSubscription( | ||
| state, | ||
| eventName, | ||
| operatorOrSubscribe, | ||
| maybeObserver | ||
| ); | ||
| }, | ||
|
|
||
| destroyModifier({ subscription }) { | ||
| subscription.unsubscribe(); | ||
| } | ||
| }), | ||
| class FromEventModifier {} | ||
| ); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| export { default } from "ember-rx/modifiers/from-event"; |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| import { module, test } from "qunit"; | ||
| import { setupRenderingTest } from "ember-qunit"; | ||
| import { setupScheduler } from "ember-rx/test-support"; | ||
| import { render, click } from "@ember/test-helpers"; | ||
| import { Subject } from "rxjs"; | ||
| import { filter } from "rxjs/operators"; | ||
| import hbs from "htmlbars-inline-precompile"; | ||
| import td from "testdouble"; | ||
|
|
||
| module("Integration | Modifier | from-event", function(hooks) { | ||
| setupRenderingTest(hooks); | ||
| setupScheduler(hooks); | ||
|
|
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| test("it can subscribe to events", async function(assert) { | ||
| this.observer = td.function(); | ||
|
|
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| await render(hbs` | ||
| <button {{from-event 'click' this.observer}}> | ||
| My Button | ||
| </button> | ||
| `); | ||
|
|
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| await click("button"); | ||
|
|
||
| assert.verify( | ||
| this.observer(td.matchers.isA(MouseEvent)), | ||
| "The observer was called with the event" | ||
| ); | ||
| }); | ||
|
|
||
| test("it can pipe the observable through an operator", async function(assert) { | ||
| this.operator = filter((_event, index) => index % 2 === 0); | ||
| this.observer = td.function(); | ||
|
|
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| await render(hbs` | ||
| <button {{from-event 'click' this.operator this.observer}}> | ||
| My Button | ||
| </button> | ||
| `); | ||
|
|
||
| await click("button"); | ||
| await click("button"); | ||
|
|
||
| assert.verify( | ||
| this.observer(td.matchers.isA(MouseEvent)), | ||
| { times: 1 }, | ||
| "The observer was called one time" | ||
| ); | ||
| }); | ||
|
|
||
| test("it handles the arguments changing", async function(assert) { | ||
| const originalObserver = td.function("original observer"); | ||
| const newObserver = td.function("new observer"); | ||
|
|
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| this.observer = originalObserver; | ||
|
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| await render(hbs` | ||
| <button {{from-event 'click' this.observer}}> | ||
| My Button | ||
| </button> | ||
| `); | ||
|
|
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| this.set("observer", newObserver); | ||
|
|
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| await click("button"); | ||
|
|
||
| assert.verify( | ||
| originalObserver(td.matchers.isA(MouseEvent)), | ||
| { times: 0 }, | ||
| "The original observer is never called" | ||
| ); | ||
|
|
||
| assert.verify( | ||
| newObserver(td.matchers.isA(MouseEvent)), | ||
| { times: 1 }, | ||
| "The new observer is called" | ||
| ); | ||
| }); | ||
|
|
||
| test("it can receive a `Subject` to surface the observable", async function(assert) { | ||
| this.subject = new Subject(); | ||
| const observer = td.function("Original observer"); | ||
|
|
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| this.subject.subscribe(observer); | ||
|
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| await render(hbs` | ||
| <button {{from-event 'click' this.subject}}> | ||
| My Button | ||
| </button> | ||
| `); | ||
|
|
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| await click("button"); | ||
|
|
||
| assert.verify( | ||
| observer(td.matchers.isA(MouseEvent)), | ||
| "The observer is called through the Subject" | ||
| ); | ||
| }); | ||
| }); |
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