具有分组测试功能的模块用于定义嵌套模块.在深入嵌套之前，QUnit会对父模块运行测试，即使它们是先声明的.嵌套模块调用上的 beforeEach 和 afterEach 回调将以LIFO(后进先出)模式堆叠到父挂钩.您可以使用参数和钩子指定在每次测试之前和之后运行的代码.
Hook还可用于创建将在每个测试的上下文中共享的属性.钩子对象上的任何其他属性都将添加到该上下文中.如果使用回调参数调用QUnit.module，则hooks参数是可选的.
调用模块的回调，将上下文作为测试环境，将环境的属性复制到模块的测试中，钩子和嵌套模块.
<html>
<head>
<meta charset = "utf-8">
<title>QUnit basic example</title>
<link rel = "stylesheet" href = "https://code.jquery.com/qunit/qunit-1.22.0.css">
<script src = "https://code.jquery.com/qunit/qunit-1.22.0.js"></script>
</head>
<body>
<div id = "qunit"></div>
<div id = "qunit-fixture"></div>
<script>
QUnit.module( "parent module", function( hooks ) {
hooks.beforeEach( function( assert ) {
assert.ok( true, "beforeEach called" );
});
hooks.afterEach( function( assert ) {
assert.ok( true, "afterEach called" );
});
QUnit.test( "hook test 1", function( assert ) {
assert.expect( 2 );
});
QUnit.module( "nested hook module", function( hooks ) {
// This will run after the parent module's beforeEach hook
hooks.beforeEach( function( assert ) {
assert.ok( true, "nested beforeEach called" );
});
// This will run before the parent module's afterEach
hooks.afterEach( function( assert ) {
assert.ok( true, "nested afterEach called" );
});
QUnit.test( "hook test 2", function( assert ) {
assert.expect( 4 );
});
});
});
</script>
<div id = "console" ></div>
</body>
</html>
