如何使用phpunit测试传递给closure的数据

我有一个类，它生成一个数据对象并将其传递给给定的可调用变量

<?php

class Foo {

    public function bar(callable $closure)
    {
        $data = $this->generateData();

        call_user_func_array($closure, compact($data));
    }

}

// example usage
$baz = new Foo()
$baz->bar(function($data) {
    var_dump($data); // I want to test $data type inside this closure
});

还要确保您的闭包甚至被调用，可能是通过设置一个变量：

$baz = new Foo();
$called = false;
$baz->bar(function($data) use (&$called) {
    $called = true;
    $this->assertSame('expected', $data);
});
$this->assertTrue($called);

$baz = new Foo();
$called = false;
$baz->bar(function($data) use (&$called) {
    $called = true;
    $this->assertSame('expected', $data);
});
$this->assertTrue($called);