变量赋值

assign 标签也是用于页面快捷赋值，这个还是用起来比较方便。

node 版本.初始化为 Null 值

{
    $parser = $this->createParser();
    $source = <<<'eot'
        <assign name="test.hello" />
        eot;
    $compiled = <<<'eot'
        <?php $test->hello = null; ?>
        eot;
    $this->assertSame($compiled, $parser->doCompile($source, null, true));
}

node 版本.初始化为指定变量

public function testNode2()
{
    $parser = $this->createParser();
    $source = <<<'eot'
        <assign name="test.hello" value="$hello" />
        eot;
        <?php $test->hello = $hello; ?>
        eot;
    $this->assertSame($compiled, $parser->doCompile($source, null, true));
}

node 版本.初始化为函数格式化占位变量

{
    $parser = $this->createParser();
    $source = <<<'eot'
        <assign name="test.hello" value="$hello|test=0,1|foo=**" />
        eot;
    $compiled = <<<'eot'
        <?php $test->hello = foo(test($hello, 0,1)); ?>
        eot;
    $this->assertSame($compiled, $parser->doCompile($source, null, true));
}

JS 风格版本

public function testLet()
{
    $parser = $this->createParser();
    $source = <<<'eot'
        {% let foo = 'foo' %}
        {% let hello = hello . 'foo' %}
        eot;
    $compiled = <<<'eot'
        <?php $foo = 'foo'; ?>
        <?php $hello = $hello . 'foo'; ?>
}

JS 风格版本.初始化为 Null 值

public function testLet3()
{
    $parser = $this->createParser();
    $source = <<<'eot'
        {% let foo %}
        eot;
    $compiled = <<<'eot'
        <?php $foo = null; ?>
        eot;
    $this->assertSame($compiled, $parser->doCompile($source, null, true));
}

JS 风格版本.初始化为 Null 值带上等于符

public function testLet4()
{
    $parser = $this->createParser();
    $source = <<<'eot'
        {% let foo = %}
        eot;
    $compiled = <<<'eot'
        <?php $foo = null; ?>
        eot;
}