Spring MVC 测试空 json

Question

How can I test for an empty JSON response from a rest endpoint. I was hoping for something along the lines:

    ResultActions actions = mockMvc.perform(..);
    actions.andExpect(jsonPath("$", empty()));

obviously this fails as {} is not exactly empty. Any advice?

Answer 1

Try this one:

 ResultActions actions = mockMvc.perform(..);
 actions.andExpect(content().string("[]"));

Answer 2

This worked for me:

ResultActions actions = mockMvc.perform(..);
actions.andExpect(content().string(""));

Answer 3

In JSON, {} is a non-null, but empty, object. This translates into Java as an empty map. You can validate that a JSON element is non-null and empty like this:

actions.andExpect(jsonPath("$").value(Collections.EMPTY_MAP))

Answer 4

exists()方法对我来说效果很好。

this.mockMvc.perform(get("....")).andExpect(jsonPath("$").exists());

Answer 5

This can be tested using an empty map provided with the "jsonpathresultmatchers".

    ResultActions actions = mockMvc.perform(..);
actions.andExpect(jsonPath("$", anEmptyMap()));

Answer 6

.andExpect(jsonPath("$").isEmpty());

is working for me.