Jackson.InvalidDefinitionException: Cannot construct instance of java.time.OffsetDateTime in JUnit @BeforeEach

huangapple
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英文:

Jackson.InvalidDefinitionException: Cannot construct instance of java.time.OffsetDateTime in JUnit @BeforeEach

问题

我正试图为我的Open-API自动生成的代码创建单元测试用例。我有一个date-time格式，在API中运行正常，但在设置我的JUnit测试用例时失败。

JUnit设置代码：

  1. @BeforeEach
  2. public void setUp() throws IOException {
  3.     MockitoAnnotations.initMocks(this);
  4.     requestDTO = objectMapper.readValue(TestData.TEST_JSON, RequestDTO.class);
  5. }

TestData.TEST_JSON：

  1. public static String TEST_JSON = "{
  2.     \"name\": \"credit_application\",
  3.     \"comments\": {
  4.         \"id\": \"1\",
  5.         \"userId\": \"21212\",
  6.         \"taskId\": \"212\",
  7.         \"time\": \"2010-07-17T02:49:58.564Z\",
  8.         \"comment\": \"Hello world\"
  9.     },
  10.     \"id\": \"123\",
  11.     \"version\": \"1.0\"
  12. }";

RequestDTO（Open-API自动生成的代码）：

  1. public class RequestDTO {
  2.     @JsonProperty("name")
  3.     private String name;
  5.     @JsonProperty("comments")
  6.     private CommentDTO comments;
  8.     @JsonProperty("id")
  9.     private String id;
  11.     // 构造函数和Getter/Setter方法
  12. }

CommentDTO（Open-API自动生成的代码）：

  1. public class CommentDTO {
  2.     @JsonProperty("id")
  3.     private String id;
  5.     @JsonProperty("userId")
  6.     private String userId;
  8.     @JsonProperty("taskId")
  9.     private String taskId;
  11.     @JsonProperty("time")
  12.     private OffsetDateTime time;
  14.     @JsonProperty("comment")
  15.     private String comment;
  17.     // 构造函数和Getter/Setter方法
  18. }

异常：

  1. com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.OffsetDateTime` 
  2. (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2020-07-27T02:49:58.564Z')
  4. 这个`date-time`在应用程序代码中可以使用并正常工作，但在JUnit设置代码中不行。
英文:

I am trying to create unit test cases for my Open-API auto-generated code. I have a date-time format which works fine in API but fails when I try to setup my JUnit test case

JUnit setup code:

  1. @BeforeEach
  2. public void setUp() throws IOException {
  3.         MockitoAnnotations.initMocks(this);
  4.         requestDTO = objectMapper.readValue(TestData.TEST_JSON, RequestDTO.class);
  5.     }

TestData.TEST_JSON :

  1. public static String TEST_JSON= "{\n" +
  2.             "  \"name\": \"credit_application\",\n" +
  3.             "  \"comments\": {\n" +
  4.             "    \"id\": \"1\",\n" +
  5.             "    \"userId\": \"21212\",\n" +
  6.             "    \"taskId\": \"212\",\n" +
  7.             "    \"time\": \"2010-07-17T02:49:58.564Z\",\n" +
  8.             "    \"comment\": \"Hello world\"\n" +
  9.             "  },\n" +
  10.             "  \"id\": \"123\",\n" +
  11.             "  \"version\": \"1.0\"\n" +
  12.             "}";
  14. /*
  15. {
  16.   "name": "credit_application",
  17.   "comments": {
  18.     "id": "1",
  19.     "userId": "21212",
  20.     "taskId": "212",
  21.     "time": "2010-07-17T02:49:58.564Z",
  22.     "comment": "Hello world"
  23.   },
  24.   "id": "123",
  25.   "version": "1.0"
  26. }
  27. */

RequestDTO (Open-API autogenerated code):

  1. public class RequestDTO   {
  2.   @JsonProperty("name")
  3.   private String name;
  5.   @JsonProperty("comments")
  6.   private CommentDTO comments;
  8.   @JsonProperty("id")
  9.   private String id;
  11.   // Constructors and Getters/Setters
  13. }

CommentDTO (Open-API autogenerated code):

  1. public class CommentDTO   {
  2.   @JsonProperty("id")
  3.   private String id;
  5.   @JsonProperty("userId")
  6.   private String userId;
  8.   @JsonProperty("taskId")
  9.   private String taskId;
  11.   @JsonProperty("time")
  12.   private OffsetDateTime time;
  14.   @JsonProperty("comment")
  15.   private String comment;
  17.   // Constructors and Getters/Setters
  18. }

Exception:

  1. com.fasterxml.jackson.databind.exc.InvalidDefinitionException: Cannot construct instance of `java.time.OffsetDateTime` (no Creators, like default construct, exist): no String-argument constructor/factory method to deserialize from String value ('2020-07-27T02:49:58.564Z')

This date-time is used and works for application code, but not in Junit setup code.

答案1

得分: 3

你需要使用JavaTimeModule来配置ObjectMapper以处理Java DateTime API，使用如下：

  1. <dependency>
  2.     <groupId>com.fasterxml.jackson.datatype</groupId>
  3.     <artifactId>jackson-datatype-jsr310</artifactId>
  4.     <version>2.9.10</version>
  5. </dependency>

然后将该模块注册到你的ObjectMapper中：

  1. ObjectMapper objectMapper = new ObjectMapper();
  2. objectMapper.registerModule(new JavaTimeModule());
  3. objectMapper.readValue(TestData.TEST_JSON, RequestDTO.class);
英文:

You need to use JavaTimeModule to configure the ObjectMapper to deal with Java DateTime API
using :

  1. &lt;dependency&gt;
  2.         &lt;groupId&gt;com.fasterxml.jackson.datatype&lt;/groupId&gt;
  3.         &lt;artifactId&gt;jackson-datatype-jsr310&lt;/artifactId&gt;
  4.         &lt;version&gt;2.9.10&lt;/version&gt;
  5. &lt;/dependency&gt;

Then register the module to you ObjectMapper

  1.  ObjectMapper objectMapper = new ObjectMapper();
  2.  objectMapper.registerModule(new JavaTimeModule());
  3.  objectMapper.readValue(TestData.TEST_JSON, RequestDTO.class);

huangapple
  • 本文由 发表于 2020年7月27日 13:55:31
  • 转载请务必保留本文链接：https://go.coder-hub.com/63109404.html
  • datetime
  • jackson
  • java
  • junit
  • openapi-generator
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