Question

运行PHPUnit测试时收到以下错误：

1）警告为CarTest :: countWheels指定的数据提供程序无效。语法错误，意外＆＃39;浮动＆＃39; （T_STRING），期待变量（T_VARIABLE）

为什么我不能使用成员变量的Wheel类并在CarTest类中引用Wheel :: NUMBER_OF_WHEELS？

这是因为在单元测试中，你应该只测试类本身的功能吗？在我的情况下，只测试Car类中的项目而不引用外部类，例如Wheel？

但是，如果我要在类Wheel中注释掉成员变量：

// private float tirePressure = null;

我没有错误。注意，我没有注释掉成员函数。所以，成员函数不会导致问题...但是，成员变量......它不喜欢？

或者，如果我要删除Wheel类，而是执行以下操作：

1）在Car类中，定义

const NUMBER_OF_WHEELS = 4;

2）在CarTest课程中

更改自：

'Good Data: (alpha)' => [2, Wheel::NUMBER_OF_WHEELS, 8]

更改为：

'Good Data: (alpha)' => [2, Car::NUMBER_OF_WHEELS, 8]

我没有错误。 AND，我在Car类中定义了成员变量。

我生成错误的代码

// =============== Car.php
<?php
declare(strict_types=1);    // strict typing

namespace App;


class Car
{
    private $make;
    private $model;
    private $color;

    function __construct(string $make)
    {
        $this->make = $make;
        echo "OK\n";
    }


    public function getMake() : string
    {
        return $this->make;
    }


    public function countWheels(int $numCars, int $numWheels) : int
    {
        return $numCars * $numWheels;
    }
}

// =============== Wheel.php
<?php

namespace App;


class Wheel
{
    /**
     *  @var    int     Typical number of wheels for a car.
     */
    const NUMBER_OF_WHEELS = 4;


    private float tirePressure = null;

    public function sayHelloWorld()
    {
        echo "Hello World!\n";
    }
}

// =============== CarTest.php
<?php

declare(strict_types=1);    // strict typing


use PHPUnit\Framework\TestCase;
use App\Car;
use App\Wheel;

class CarTest extends TestCase
{
    /**
     *  ========================================================================
     *  @test
     *  ========================================================================
     */
    public function true_asserts_to_true()
    {
        $this->assertTrue(true);
    }


    /**
     *  ========================================================================
     *  Test: Get make of Car
     *
     *  @dataProvider getMakeProvider
     *  @test
     *  ========================================================================
     */
    public function getMake($expected)
    {
        $myCar = new Car("Ford");
        $actual = $myCar->getMake();
        $this->assertEquals($expected, $actual);
    }


    /**
     *  ========================================================================
     *  Data Provider for: getMake
     *  ========================================================================
     */
    public function getMakeProvider()
    {
        // NOTE: This is an associative array.  Therefore, each index must be unique (hence, 'alpha', 'beta', etc.).
        return [
            // NOTE: To generate a failure, set the expected value to something other than the actual value.
            'Good Data: (alpha)' => ["Ford"]
        ];
    }


    /**
     *  ========================================================================
     *  Test: Get make of Car
     *
     *  @dataProvider countWheelsProvider
     *  @test
     *  ========================================================================
     */
    public function countWheels($numCars, $numWheels, $expected)
    {
        // echo "PHPUnit: " . PHPUnit_Runner_Version.id() ."\n";
        $myCar = new Car("Ford");
        $actual = $myCar->countWheels($numCars, $numWheels);
        $this->assertEquals($expected, $actual);
    }


    /**
     *  ========================================================================
     *  Data Provider for: countWheels
     *  ========================================================================
     */
    public function countWheelsProvider()
    {
        // NOTE: This is an associative array.  Therefore, each index must be unique (hence, 'alpha', 'beta', etc.).
        return [
            // NOTE: To generate a failure, set the expected value to something other than the actual value.
            'Good Data: (alpha)' => [2, Wheel::NUMBER_OF_WHEELS, 8]
        ];
    }
}

我的系统：

Sebastian Bergmann和贡献者的PHPUnit 6.3.0。运行时：PHP 7.0.24-1 + ubuntu14.04.1 + deb.sury.org + 1与Xdebug 2.5.5

谢谢

Answer 1

在PHP中，你不能给类变量一个类型......

private float tirePressure = null;

需要

private $tirePressure = null;

此外，您需要让$表示变量。

PHPUnit Test，在引用具有成员变量

1 个答案: