Question

我正在创建一些单元测试并尝试模拟一些调用。以下是我在工作代码中的内容：

String soapRequest = (SimUtil.readInputStream(request.getInputStream())).toString();
if (soapRequest.equals("My String")) { ... }

和SimUtil.readInputSteam看起来像这样：

StringBuffer sb = new StringBuffer();
BufferedReader reader = null;
try  {
    reader = new BufferedReader(new InputStreamReader(inputStream));
    final int buffSize = 1024;
    char[] buf = new char[buffSize];
    int numRead = 0;
    while ((numRead = reader.read(buf)) != -1) {
        String readData = String.valueOf(buf, 0, numRead);
        sb.append(readData);
        buf = new char[buffSize];
    }
} catch (IOException e) {
    LOG.error(e.getMessage(), e);
} finally {
    try {
        if (reader != null) {
            reader.close();
        }
    } catch (IOException e) {
        LOG.error(e.getMessage(), e);
    }
}

我要做的是request.getInputStream（），该流返回某些String。

HttpServletRequest request = mock(HttpServletRequest.class);
ServletInputStream inputStream = mock(ServletInputStream.class);
when(request.getInputStream()).thenReturn(inputStream);

所以这是我要条件的代码

when(inputStream.read()).thenReturn("My String".toInt());

非常感谢任何帮助。

Answer 1

不要模拟InputStream。而是使用。将String转换为字节数组 getBytes（）方法。然后使用数组作为输入创建一个ByteArrayInputStream，以便在消耗时返回String，每次返回每个字节。接下来，创建一个ServletInputStream，它包装一个常规的InputStream，就像Spring中的那样：

public class DelegatingServletInputStream extends ServletInputStream {

    private final InputStream sourceStream;


    /**
     * Create a DelegatingServletInputStream for the given source stream.
     * @param sourceStream the source stream (never <code>null</code>)
     */
    public DelegatingServletInputStream(InputStream sourceStream) {
        Assert.notNull(sourceStream, "Source InputStream must not be null");
        this.sourceStream = sourceStream;
    }

    /**
     * Return the underlying source stream (never <code>null</code>).
     */
    public final InputStream getSourceStream() {
        return this.sourceStream;
    }


    public int read() throws IOException {
        return this.sourceStream.read();
    }

    public void close() throws IOException {
        super.close();
        this.sourceStream.close();
    }

}

最后，HttpServletRequest mock将返回此DelegatingServletInputStream对象。

Answer 2

与接受的答案类似，但结合了this question ...

的想法

RenderTargetBitmap renderTargetBitmap = new RenderTargetBitmap();
            await renderTargetBitmap.RenderAsync(grid_editor);

            image_preview.Source = renderTargetBitmap;

如何模拟javax.servlet.ServletInputStream

2 个答案: