选中 "Check for Globals" 会暴露全局对象，看你的代码会不会无意中输出到全局对象属性去了
选中 No try-catch 的话，出现错误testrunner就会挂掉，让你看到原生的错误提示，帮助在老浏览器调试 ie6啦
本质上任何一个单元测试的元素都是进行认定，测试框架将测试者定义的期望结构和实际结果进行比对，Qunit提供了八个方法来认定。
assert.ok( 1 == "2", "成功啦!" ); 当第一个参数返回TRUE就表示测试通过了，后面的字符串用来描述该测试
assert.equal( 0, 0, "Zero, Zero; equal succeeds" ); 这个方法是用==来比较现实参数和期望参数，第一个是现实的值，第二个是期望的值
assert.strictEqual( 0, 0, "Zero, Zero; equal succeeds" ); 这个方法是用=== 绝对相等来比较的
assert.deepEqual( obj, { foo: "bar" }, "Two objects can be the same in value" ); 这也是用绝对相等来比较的，并且会比较两个对象里面的属性是否一致，还可以比较NaN，日期对象，正则表达式，函数等equal（）不能胜任的
有时候你的代码可能会让测试没有运行到，加上expect（）告诉测试器一共要执行多少个测试：
QUnit.test( "a test", function( assert ) {
expect( 4 );
function calc( x, operation ) {
return operation( x );
}
var result = calc( 2, function( x ) {
assert.ok( true, "calc() calls operation function" );
return x * x;
});
assert.equal( result, 4, "2 square equals 4" );
});
对于异步回调函数的话，要使用asyncTest，配备QUnit.start();：
QUnit.asyncTest( "asynchronous test: one second later!", function( assert ) {
expect( 1 );
setTimeout(function() {
assert.ok( true, "Passed and ready to resume!" );
QUnit.start();
}, 1000);
});
expect( 1 );
setTimeout(function() {
assert.ok( true, "Passed and ready to resume!" );
QUnit.start();
}, 1000);
});
测试需要交互的场景：
function KeyLogger( target ) {
if ( !(this instanceof KeyLogger) ) {
return new KeyLogger( target );
}
this.target = target;
this.log = [];
var self = this;
this.target.off( "keydown" ).on( "keydown", function( event ) {
self.log.push( event.keyCode );
});
}
测试代码：
QUnit.test( "keylogger api behavior", function( assert ) {
var event,
$doc = $( document ),
keys = KeyLogger( $doc );
// trigger event
event = $.Event( "keydown" );
event.keyCode = 9;
$doc.trigger( event );
// verify expected behavior
assert.equal( keys.log.length, 1, "a key was logged" );
assert.equal( keys.log[ 0 ], 9, "correct key was logged" );
});
在module（）方法之后的测试属于同一个模块：
QUnit.module( "group a" );
QUnit.test( "a basic test example", function( assert ) {
assert.ok( true, "this test is fine" );
});
QUnit.test( "a basic test example 2", function( assert ) {
assert.ok( true, "this test is fine" );
});
QUnit.module( "group b" );
QUnit.test( "a basic test example 3", function( assert ) {
assert.ok( true, "this test is fine" );
});
QUnit.test( "a basic test example 4", function( assert ) {
assert.ok( true, "this test is fine" );
});
module（）还可以提取模块中各测试的共同部分，setup在每个测试之前运行，teardown在测试后运行：
QUnit.module( "module", {
setup: function( assert ) {
assert.ok( true, "one extra assert per test" );
}, teardown: function( assert ) {
assert.ok( true, "and one extra assert after each test" );
}
});
QUnit.test( "test with setup and teardown", function() {
expect( 2 );
});
还可以定制自己的测试方法：
QUnit.assert.contains = function( needle, haystack, message ) {
var actual = haystack.indexOf(needle) > -1;
QUnit.push(actual, actual, needle, message);
};
QUnit.test("retrieving object keys", function( assert ) {
var objectKeys = keys( { a: 1, b: 2 } );
assert.contains( "a", objectKeys, "Object keys" );
assert.contains( "b", objectKeys, "Object keys" );
var arrayKeys = keys( [1, 2] );
assert.contains( "1", arrayKeys, "Array keys" );
assert.contains( "2", arrayKeys, "Array keys" );
});