[PHP] 抽象工厂设计模式-创建型设计模式

interface WriterFactory{
    public function createCsvWriter(): CsvWriter;
    public function createJsonWriter(): JsonWriter;
}
interface CsvWriter{
    public function write(array $line): string;
}
interface JsonWriter{
    public function write(array $data, bool $formatted): string;
}

具体使用:
class AbstractFactoryTest extends TestCase{
    //提供工厂,提供了两个系统下的工厂
    public function provideFactory()
    {
        return [
            [new UnixWriterFactory()],
            [new WinWriterFactory()]
        ];
    }
    //使用提供的工厂,创建对象,当我们在定义参数类型时都可以直接使用抽象类的名字来定义
    public function testCanCreateCsvWriterOnUnix(WriterFactory $writerFactory)
    {
        $this->assertInstanceOf(JsonWriter::class, $writerFactory->createJsonWriter());
        $this->assertInstanceOf(CsvWriter::class, $writerFactory->createCsvWriter());
    }
}