SonarCloud coverage stating that class property with JsonProperty annotation not covered by tests - spring

Question

I have a Kotlin project with Spring, and I created a class that looks like the following:
#JsonIgnoreProperties(ignoreUnknown = true)
data class Response(
val id: String,
#JsonProperty("quantity_of_days")
val quantityOfDays: Int,
)
And my SonarCloud reports state that the quantityOfDays line is not covered by tests:
This line is accessed multiple times inside my tests, and I even created one specifically to instantiate an object of that class. However, this line is still marked as not covered.
I wonder if it has something to do with the annotation, and if so, how do I ignore or force this line to be covered?

Answer 1

Ok so, it was necessary to write some very specific tests to cover that:
class ResponseTest {
#Test
fun `create response from json with underline attribute`() {
val id = "123"
val quantityOfDays = 1
val response = Response(id, quantityOfDays)
val value = Mapper.objectMapper.readValue(
"""
{
"id": "$id",
"quantity_of_days": $quantityOfDays
}
""".trimIndent(), Response::class.java)
assertThat(value).isEqualTo(response)
}
#Test
fun `create response from json with camel case attribute`() {
val response = ResponseBuilder().build()
val json = Mapper.objectMapper.writeValueAsString(response)
val value = Mapper.objectMapper.readValue(json, Response::class.java)
assertThat(value).isEqualTo(response)
}
}
I am not sure if that is the best solution, maybe there is a way to make the coverage ignore that in specific, but I could not find it. But it works.