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("$", empty()));
obviously this fails as {} is not exactly empty.
Any advice?
Try this one:
ResultActions actions = mockMvc.perform(..);
actions.andExpect(content().string("[]"));
This worked for me:
ResultActions actions = mockMvc.perform(..);
actions.andExpect(content().string(""));
In JSON, {} is a non-null, but empty, object. This translates into Java as an empty map. You can validate that a JSON element is non-null and empty like this:
actions.andExpect(jsonPath("$").value(Collections.EMPTY_MAP))
The exists() method worked well for me.
this.mockMvc.perform(get("....")).andExpect(jsonPath("$").exists());
.andExpect(jsonPath("$").isEmpty());
is working for me.
This can be tested using an empty map provided with the "jsonpathresultmatchers".
ResultActions actions = mockMvc.perform(..);
actions.andExpect(jsonPath("$", anEmptyMap()));
