我想用MockMvc测试一个没有 Spring 上下文的 Spring 控制器。此控制器通过将内容写入响应的OutputStream来流式传输内容。
这是控制器代码:
@RequestMapping(method = GET, value = "/file")
public void getFile(HttpServletResponse response) throws IOException {
response.setHeader("Content-Disposition", "attachment; filename=file.json");
ObjectWriter objectWriter = new ObjectMapper().setSerializationInclusion(JsonInclude.Include.NON_NULL).writer();
Item item = new Item();
List<Item> items = new ArrayList<>();
items.add(item);
try (Writer bufferedWriter = new BufferedWriter(new OutputStreamWriter(response.getOutputStream()))) {
objectWriter.writeValue(bufferedWriter, items);
bufferedWriter.flush();
}
}
这是测试:
@Test
public void getFile_ok() throws Exception {
mockMvc.perform(get(END_POINT + "/file").accept(MediaType.APPLICATION_JSON))
.andExpect(status().isOk());
}
此控制器运行良好,但单元测试失败并出现 IOException:
java.io.IOException: Stream closed
at java.io.BufferedWriter.ensureOpen(BufferedWriter.java:116)
at java.io.BufferedWriter.flushBuffer(BufferedWriter.java:126)
at java.io.BufferedWriter.flush(BufferedWriter.java:253)