我的应用程序通过Microsoft.Devices.Sensors.Accelerometer类
现在我想编写Unit或CodedUI测试，因此我需要有Accelerometer的特殊测试实现来控制返回的数据
理论上我有3个选择：
Accelerometer的子类 - 不可能，因为Accelerometer是sealed类Accelerometer的实现 - 不是最佳选择恕我直言SensorBase<AccelerometerReading>的子类 - 好选项我决定前往#1并将TestAccelerometer作为SensorBase<AccelerometerReading>
这是我有问题：
`Error CS1729 'SensorBase<AccelerometerReading>' does not contain a constructor that takes 0 arguments`
错误很清楚我已查看反编译代码（JetBrains dotPeak工具）并且根本找不到任何构造函数。
如何在TestAccelerometer实施中找到合适的构造函数？
Microsoft.Devices.Sensors.Accelerometer
// Type: Microsoft.Devices.Sensors.Accelerometer
// Assembly: Microsoft.Devices.Sensors, Version=8.0.0.0, Culture=neutral, PublicKeyToken=24eec0d8c86cda1e
// MVID: 81ED89AA-6B11-4B39-BAFA-38D59CBB1E3B
// Assembly location: C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\WindowsPhone\v8.0\Microsoft.Devices.Sensors.dll
using System;
namespace Microsoft.Devices.Sensors
{
/// <summary>
/// Provides Windows Phone applications access to the device’s accelerometer sensor.
/// </summary>
public sealed class Accelerometer : SensorBase<AccelerometerReading>
{
/// <summary>
/// Gets or sets whether the device on which the application is running supports the accelerometer sensor.
/// </summary>
///
/// <returns>
/// true if the device on which the application is running supports the accelerometer sensor; otherwise, false.
/// </returns>
public static bool IsSupported { get; internal set; }
/// <summary>
/// Gets the current state of the accelerometer. The value is a member of the <see cref="T:Microsoft.Devices.Sensors.SensorState"/> enumeration.
/// </summary>
///
/// <returns>
/// Type: <see cref="T:Microsoft.Devices.Sensors.SensorState"/>.
/// </returns>
public SensorState State { get; private set; }
/// <summary>
/// Occurs when new data arrives from the accelerometer. This method is deprecated in the current release. Applications should use the <see cref="E:Microsoft.Devices.Sensors.SensorBase`1.CurrentValueChanged"/> event of the <see cref="T:Microsoft.Devices.Sensors.SensorBase`1"/> class instead.
/// </summary>
[Obsolete("use CurrentValueChanged")]
public event EventHandler<AccelerometerReadingEventArgs> ReadingChanged;
static Accelerometer();
/// <summary>
/// Releases the managed and unmanaged resources used by the <see cref="T:Microsoft.Devices.Sensors.Accelerometer"/>.
/// </summary>
public new void Dispose();
/// <summary>
/// Starts data acquisition from the accelerometer.
/// </summary>
public new void Start();
/// <summary>
/// Stops data acquisition from the accelerometer.
/// </summary>
public new void Stop();
}
}
Microsoft.Devices.Sensors.SensorBase
// Type: Microsoft.Devices.Sensors.SensorBase`1
// Assembly: Microsoft.Devices.Sensors, Version=8.0.0.0, Culture=neutral, PublicKeyToken=24eec0d8c86cda1e
// MVID: 81ED89AA-6B11-4B39-BAFA-38D59CBB1E3B
// Assembly location: C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework\WindowsPhone\v8.0\Microsoft.Devices.Sensors.dll
using System;
using System.Security;
namespace Microsoft.Devices.Sensors
{
/// <summary>
/// The base class for all Windows Phone sensor classes.
/// </summary>
/// <typeparam name="TSensorReading">The type of reading returned by the sensor.</typeparam>
public abstract class SensorBase<TSensorReading> : IDisposable where TSensorReading : ISensorReading
{
/// <summary>
/// Gets an object that implements <see cref="T:Microsoft.Devices.Sensors.ISensorReading"/> that contains the current value of the sensor. This object will be one of the following types, depending on which sensor is being referenced: <see cref="T:Microsoft.Devices.Sensors.AccelerometerReading"/>, <see cref="T:Microsoft.Devices.Sensors.CompassReading"/>, <see cref="T:Microsoft.Devices.Sensors.GyroscopeReading"/>, <see cref="T:Microsoft.Devices.Sensors.MotionReading"/>.
/// </summary>
///
/// <returns>
/// An object that implements <see cref="T:Microsoft.Devices.Sensors.ISensorReading"/> that contains the current value of the sensor.
/// </returns>
public TSensorReading CurrentValue { get; }
/// <summary>
/// Gets or sets the preferred time between <see cref="E:Microsoft.Devices.Sensors.SensorBase`1.CurrentValueChanged"/> events.
/// </summary>
///
/// <returns>
/// Type: <see cref="T:System.TimeSpan"/>. The preferred time between CurrentValueChanged events.
/// </returns>
public TimeSpan TimeBetweenUpdates { get; set; }
/// <summary>
/// Gets the validity of the sensor’s data.
/// </summary>
///
/// <returns>
/// Type: <see cref="T:System.Boolean"/>. true if the sensor’s data is valid; otherwise, false.
/// </returns>
public bool IsDataValid { get; }
/// <summary>
/// Occurs when new data arrives from the sensor.
/// </summary>
public event EventHandler<SensorReadingEventArgs<TSensorReading>> CurrentValueChanged;
static SensorBase();
internal SensorBase();
/// <summary>
/// Allows an object to try to free resources and perform other cleanup operations before the Object is reclaimed by garbage collection.
/// </summary>
[SecuritySafeCritical]
~SensorBase();
/// <summary>
/// Releases the managed and unmanaged resources used by the sensor.
/// </summary>
[SecuritySafeCritical]
public void Dispose();
/// <summary>
/// Starts acquisition of data from the sensor.
/// </summary>
public virtual void Start();
/// <summary>
/// Stops acquisition of data from the sensor.
/// </summary>
public virtual void Stop();
}
}
答案 0 :(得分：1)
您 找到了构造函数：
/**
* Decode string to image
* @param encodedString The string to decode
* @return decoded image
*/
public static BufferedImage decodeToImage(String encodedString) {
BufferedImage image = null;
byte[] imageByte;
try {
imageByte = Base64.decodeBase64(encodedString);
ByteArrayInputStream bis = new ByteArrayInputStream(imageByte);
image = ImageIO.read(bis);
bis.close();
} catch (Exception e) {
e.printStackTrace();
}
return image;
}
此构造函数阻止internal SensorBase();
具有默认的公共构造函数，并且此类不能从其程序集外部进行子类化。
测试它会很复杂。您可以重新设计应用程序并使用SensorBase的包装器/适配器进行测试，或者您可以检查Windows Phone上是否有mocking a sealed class。