JsonPath config for MockMvc - spring

Question

JsonPath itself can be configured like this
import com.jayway.jsonpath.Configuration;
import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.Option;
// ...
Configuration configuration = Configuration
.builder()
.options(Option.REQUIRE_PROPERTIES)
.build();
JsonPath
.using(configuration)
.parse(someJson)
.read("$.*.bar");
The example above enables Option.REQUIRE_PROPERTIES configuration option, so it will throw an exception if path does not exist.
How to configure the same thing for jsonPath used by MockMvc in a spring boot project?
import org.springframework.test.web.servlet.MockMvc;
import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
// ...
mockMvc
.perform(get("/test"))
.andExpect(status().isOk())
.andExpect(jsonPath("$.*.bar").isEmpty()) // How to configure this 'jsonPath'?
Update
See the following example:
Input
[
{"animal": "cat", "meow": true},
{"animal": "cat", "meow": true},
{"animal": "cat", "bark": true}
]
Expression
jsonPath("$.[?(#.animal == 'cat')].meow").value(everyItem(equalTo(true))
This produces a "false positive" test result. How I could write the json path expression, as I expect this test to produce a failed result.

Answer 1

No, unfortunately, we can't configure JSONPath that fine, in context of spring-test-mockmvc.
Proof (https://github.com/spring-projects/spring-framework/blob/main/spring-test/src/main/java/org/springframework/test/util/JsonPathExpectationsHelper.java#L61):
this.jsonPath = JsonPath.compile(this.expression);
"They" use (internally) a simpler instantiation (without configuration).
(What is wrong with isEmpty(), do you need this exception?)
There are also alternative matchers like:
doesNotExist()
doesNotHaveJsonPath()
If we need this fine config + exact exception, we can still:
Use JsonPath directly (/as a bean) to:
parse (e.g.) from MvcResult.getResponse().getContentAsString()
#Bean
Configuration configuration()
return Configuration
.builder()
.options(Option.REQUIRE_PROPERTIES)
.build();
}
..and then:
#Autowired
Configuration config;
// ...
MvcResult result = mockMvc
.perform(get("/test"))
.andExpect(status().isOk())
.andReturn();
// try/expect:
JsonPath
.using(config)
.parse(result.getResponse().getContentAsString())
.read("$.*.bar");
Refs:
https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/test/web/servlet/result/JsonPathResultMatchers.html
https://docs.spring.io/spring-framework/docs/current/javadoc-api/org/springframework/test/web/servlet/MvcResult.html
https://github.com/json-path/JsonPath (in-/definit)