java - JsonPath JUnit escape character for dots

Question

I have a json field which is called template.welcome.email and I am writing a unit test that checks if that field is present in the reply from the server but I can't find an escape for the dots in the name of the field. The code of my test is :

@Test
public void testEmailTemplates() throws Exception {     
    mockMvc.perform(get("/emailTemplates")
        .contentType(MediaType.APPLICATION_JSON)
        .locale(Locale.UK)
        .accept(MediaType.APPLICATION_JSON))

        .andDo(print())
        .andExpect(status().isOk())

        .andExpect(jsonPath("$.template.welcome.email").exists())

        .andExpect(redirectedUrl(null))
        .andExpect(forwardedUrl(null));
}

But I get the following exception, because the dots are interpreted like paths:

java.lang.AssertionError: No value for JSON path: $.template.welcome.email, exception: invalid path
at org.springframework.test.util.JsonPathExpectationsHelper.evaluateJsonPath(JsonPathExpectationsHelper.java:74)
at org.springframework.test.util.JsonPathExpectationsHelper.exists(JsonPathExpectationsHelper.java:121)
at org.springframework.test.web.servlet.result.JsonPathResultMatchers$3.match(JsonPathResultMatchers.java:77)
at org.springframework.test.web.servlet.MockMvc$1.andExpect(MockMvc.java:141)
at 

Do you know any escape character for the jsonPath?

Answer 1

Use brackets and quotes around your field. For example, if your field is valid.key.with.dot

Refer to it as ['valid.key.with.dot'] and in JsonPath, try

JsonPath.read(jsonString, "$.['valid.key.with.dot']")

See this thread also: https://groups.google.com/forum/#!topic/jsonpath/7YvgXWP1_7Y