// Copyright 2012 The Closure Library Authors. All Rights Reserved.
// Use of this source code is governed by the Apache License, Version 2.0.

goog.provide('goog.result.DeferredAdaptorTest');
goog.setTestOnly('goog.result.DeferredAdaptorTest');

goog.require('goog.result');
goog.require('goog.result.DeferredAdaptor');
goog.require('goog.result.SimpleResult');
goog.require('goog.testing.jsunit');
goog.require('goog.testing.recordFunction');

var result, deferred, record;

function setUp() {
  result = new goog.result.SimpleResult();
  deferred = new goog.result.DeferredAdaptor(result);
  record = new goog.testing.recordFunction();
}

function tearDown() {
  result = deferred = record = null;
}

function testResultSuccessfulResolution() {
  deferred.addCallback(record);
  result.setValue(1);
  assertEquals(1, record.getCallCount());
  var call = record.popLastCall();
  assertEquals(1, call.getArgument(0));
}

function testResultErrorResolution() {
  deferred.addErrback(record);
  result.setError(2);
  assertEquals(1, record.getCallCount());
  var call = record.popLastCall();
  assertEquals(2, call.getArgument(0));
}

function testResultCancelResolution() {
  deferred.addCallback(record);
  var cancelCallback = new goog.testing.recordFunction();
  deferred.addErrback(cancelCallback);
  result.cancel();
  assertEquals(0, record.getCallCount());
  assertEquals(1, cancelCallback.getCallCount());
  var call = cancelCallback.popLastCall();
  assertTrue(call.getArgument(0) instanceof
             goog.async.Deferred.CanceledError);
}

function testAddCallbackOnResolvedResult() {
  result.setValue(1);
  assertEquals(1, result.getValue());
  deferred.addCallback(record);

  // callback should be called immediately when result is already resolved.
  assertEquals(1, record.getCallCount());
  assertEquals(1, record.popLastCall().getArgument(0));
}

function testAddErrbackOnErroredResult() {
  result.setError(1);
  assertEquals(1, result.getError());

  // errback should be called immediately when result already errored.
  deferred.addErrback(record);
  assertEquals(1, record.getCallCount());
  assertEquals(1, record.popLastCall().getArgument(0));
}