QueryPHP

# 函数惰性加载

Testing Is Documentation

tests/Kernel/FnTest.php

使用函数惰性加载可以更好地管理辅助方法，避免载入过多无用的辅助函数，并且可以提高性能。

func 是一个全局函数随着 kernel 包自动加载，可以在业务中随时使用，组件开发中请使用原生 class_exists 导入函数。

Uses

<?php

use Error;
use Exception;

# 分组函数

public function testGroup(): void
{
    $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn1'));
    $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn2'));

    $result = func(fn () => testgroup_fn1());
    $this->assertSame('hello world', $result);
    $result = func(fn () => testgroup_fn2());
    $this->assertSame('hello world2', $result);

    $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn1'));
    $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\testgroup_fn2'));
}

# 单个函数

public function testSingleFn(): void
{
    $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\single_fn'));

    $result = func(fn () => single_fn());
    $this->assertSame('hello single fn', $result);

    $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\single_fn'));
}

# 目录索引函数

public function testIndex(): void
{
    $this->assertFalse(function_exists('Tests\\Kernel\\Fixtures\\Func\\foo_bar'));

    $result = func(fn () => foo_bar());
    $this->assertSame('foo bar', $result);
    $result = func(fn () => foo_bar(' haha'));
    $this->assertSame('foo bar haha', $result);
    $result = func(fn (string $extend = '') => foo_bar($extend), ' haha');
    $result = func(function (string $extend = '') {
        return foo_bar($extend);
    }, ' haha');
    $this->assertSame('foo bar haha', $result);

    $this->assertTrue(function_exists('Tests\\Kernel\\Fixtures\\Func\\foo_bar'));
}

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