promise_test.html - Android社区 - https://www.androidos.net.cn/

<!DOCTYPE html>
<html>
<head>
<!-- TODO(arv): Check in Closue unit tests and make this run as part of the
     tests -->
<script src="http://closure-library.googlecode.com/svn/trunk/closure/goog/base.js"></script>
<script src="../cr.js"></script>
<script src="promise.js"></script>
<script>

goog.require('goog.testing.jsunit');
goog.require('goog.testing.MockClock');

</script>
</head>
<body>
<script>

var mockClock;

function setUp() {
  mockClock = new goog.testing.MockClock();
  mockClock.install();
}

function tearDown() {
  mockClock.uninstall();
}

const Promise = cr.Promise;

function testCallbacks() {
  var calls1 = 0;
  var calls2 = 0;
  var V = {};
  function f1(v) {
    calls1++;
    assertEquals(V, v);
  }
  function f2(v) {
    calls2++;
    assertEquals(V, v);
  }
  var p = new Promise;
  p.addListener(f1);
  p.addListener(f2);
  p.value = V;
  assertEquals(1, calls1);
  assertEquals(1, calls2);
}

function testCallbacks2() {
  var calls1 = 0;
  var calls2 = 0;
  var V = {};
  function f1(v) {
    calls1++;
    assertEquals(V, v);
  }
  function f2(v) {
    calls2++;
    assertEquals(V, v);
  }
  var p = new Promise;
  p.addListener(f1);
  p.addListener(f2);
  p.removeListener(f1);
  p.value = V;
  assertEquals(0, calls1);
  assertEquals(1, calls2);
}

function testCallbacks3() {
  var calls1 = 0;
  var calls2 = 0;
  var V = {};
  function f1(v) {
    calls1++;
    assertEquals(V, v);
  }
  function f2(v) {
    calls2++;
    assertEquals(V, v);
  }
  var p = new Promise;
  p.addListener(f1);
  assertEquals(0, calls1);
  assertEquals(0, calls2);
  p.value = V;
  assertEquals(1, calls1);
  assertEquals(0, calls2);
  p.addListener(f2);
  assertEquals(1, calls1);
  assertEquals(1, calls2);
}

function testCallbacks4() {
  var calls1 = 0;
  var calls2 = 0;
  var V = {};
  function f1(v) {
    calls1++;
    assertEquals(V, v);
  }
  function f2(v) {
    calls2++;
    assertEquals(V, v);
  }
  var p = new Promise(V);
  p.addListener(f1);
  p.addListener(f2);
  assertEquals(1, calls1);
  assertEquals(1, calls2);
}

function testThisInCallback() {
  var calls = 0;
  var V = {};
  function f(v) {
    calls++;
    assertEquals(V, v);
    assertNotEquals(p, this);
  }
  var p = new Promise;
  p.addListener(f);
  p.value = V;
  assertEquals(1, calls);
}

function testPending() {
  var p = new Promise;
  assertEquals(undefined, p.value);
  assertFalse(p.done);
}

function testValueCanBeUndefined() {
  var p = new Promise;
  p.value = undefined;
  assertEquals(undefined, p.value);
  assertTrue(p.done);
}

function testDone() {
  var p = new Promise;
  assertFalse(p.done);
  p.value = 42;
  assertTrue(p.done);
}

function testWhen() {
  const V = {};
  var calls = 0;
  var p = new Promise;
  p.value = V;
  Promise.when(p, function(v) {
    assertEquals(V, v);
    calls++;
  });
  assertEquals(1, calls);
}

function testWhen2() {
  const V = {};
  var calls = 0;
  var p = new Promise;
  Promise.when(p, function(v) {
    assertEquals(V, v);
    calls++;
  });
  p.value = V;
  assertEquals(1, calls);
}

function testWait() {
  const S = {};
  var p = Promise.wait(1000, S);
  assertFalse(p.done);
  mockClock.tick(500);
  assertFalse(p.done);
  mockClock.tick(500);
  assertTrue(p.done);
  assertEquals(S, p.value);
}

function testAny() {
  var p1 = new Promise;
  var p2 = new Promise;
  var p3 = new Promise;

  var any = Promise.any(p1, p2, p3);
  p2.value = 2;
  assertEquals(2, any.value);
  p1.value = 1;
  assertEquals(2, any.value);
}

function testAll() {
  var p1 = new Promise;
  var p2 = new Promise;
  var p3 = new Promise;

  var pAll = Promise.all(p1, p2, p3);
  p1.value = 1;
  p2.value = 2;
  p3.value = 3;
  assertArrayEquals([1, 2, 3], pAll.value);
}

function testAllEmpty() {
  var pAll = Promise.all();
  assertArrayEquals([], pAll.value);
}

function testAllAlreadyDone() {
  var p1 = new Promise(1);
  var p2 = new Promise(2);
  var p3 = new Promise(3);

  var pAll = Promise.all(p1, p2, p3);
  assertArrayEquals([1, 2, 3], pAll.value);
}

function testEvent() {
  var p = Promise.event(document.body, 'foo');
  var e = new cr.Event('foo');
  document.body.dispatchEvent(e);
  assertEquals(e, p.value);
}

function testToString() {
  var p1 = new Promise;
  assertEquals('[object Promise]', String(p1));

  var p2 = new Promise;
  p2.value = 'Hello world';
  assertEquals('Hello world', String(p2));
}

function testValueOf() {
  var p = new Promise;
  p.value = 42;

  assertTrue(p < 43);
  assertTrue(p > 41);
  assertTrue(p == 42);
}

</script>
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</html>