# devopsgym / testgen__fasterxml__jackson-databind-4015 - taskset: [devopsgym](https://harnessreport.com/tasks/devopsgym.md) - difficulty: hard - category: test-generation - language: - runnable from the site: no - agent timeout: 3000s ## Results by harness _none yet_ ## Instruction ``` The following text contains a user issue (in <issue/> brackets) posted at a repository. Further, you are provided with file contents of several files in the repository that contain relevant code (in <code> brackets). It may be necessary to use code from third party dependencies or files not contained in the attached documents however. Your task is to identify the issue and implement a test case that verifies a proposed solution to this issue. More details at the end of this text. <issue> **Describe the bug** When trying to deserialise an empty JSON string as `java.util.Locale`, the resulting value is `NULL`, when ACCEPT_EMPTY_STRING_AS_NULL_OBJECT is set to `true`. My expectation was that the empty string would be converted to `Locale.ROOT`. **Version information** 2.13.5 **To Reproduce** The following test fails: ```java class JsonDeserializationTest { @Test void testDeserializeRootLocale() throws JsonProcessingException { ObjectMapper objectMapper = new ObjectMapper(); objectMapper.configure(DeserializationFeature.ACCEPT_EMPTY_STRING_AS_NULL_OBJECT, true); assertEquals(Locale.ROOT, objectMapper.readValue("\"\"", Locale.class)); } } ``` When looking at the current source code at https://github.com/FasterXML/jackson-databind/blob/2.16/src/main/java/com/fasterxml/jackson/databind/cfg/CoercionConfigs.java#L241 It looks like `CoercionAction.TryConvert` should be returned in this case. </issue> Please generate test cases that check whether an implemented solution resolves the issue of the user (at the top, within <issue/> brackets). You may apply changes to several files. Apply as much reasoning as you please and see necessary. Make sure to implement only test cases and don't try to fix the issue itself. You are not allowed to read git history. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp