Using Spring's mockMvc, how do I check if the returned data contains part of a string?

Question

I’m using Spring 3.2.11.RELEASE and JUnit 4.11. Using the Spring mockMvc framework, how do I check if a method returning JSON data contains a particular JSON element? I have

    mockMvc.perform(get("/api/users/" + id))
        .andExpect(status().isOk())
        .andExpect(content().string("{\"id\":\"" + id + "\"}")); 

but this checks for an exact match against the string returned and I’d rather check if the JSON string contains the value contained by my local field “id”.

Answer 1

Looks like you can pass a Hamcrest Matcher instead of a string there. Should be something like:

mockMvc.perform(get("/api/users/" + id))
    .andExpect(status().isOk())
    .andExpect(content().string(org.hamcrest.Matchers.containsString("{\"id\":\"" + id + "\"}")));