@WebfluxTest 因子资源失败，例如 posts/post id/comments
@WebfluxTest failed with subresources, eg posts/post id/comments
什么时候我使用 @WebFluxTest 在模拟环境中测试我的控制器，并尝试测试 Post 的 Comment 子资源又名 /posts/1/comments, 失败。但是 /posts 相关端点的测试有效。
PostController代码如下，完整代码为here:
@RestController()
@RequestMapping(value = "/posts")
class PostController {
private final PostRepository posts;
private final CommentRepository comments;
public PostController(PostRepository posts, CommentRepository comments) {
this.posts = posts;
this.comments = comments;
}
//other methods for /posts endpoints
@GetMapping("/{id}/comments")
public Flux<Comment> getCommentsOf(@PathVariable("id") String id) {
return this.comments.findByPost(new PostId(id));
}
@PostMapping("/{id}/comments")
public Mono<Comment> createCommentsOf(@PathVariable("id") String id, @RequestBody @Valid CommentForm form) {
Comment comment = Comment.builder()
.post(new PostId(id))
.content(form.getContent())
.build();
return this.comments.save(comment);
}
}
PostControllerTests 如下所示，完整代码为here:
@RunWith(SpringRunner.class)
@WebFluxTest(controllers = PostController.class)
public class PostControllerTest {
@Autowired
WebTestClient client;
@MockBean
PostRepository posts;
@MockBean
CommentRepository comments;
// other tests
@Test
public void getCommentsByPostId_shouldBeOk() {
given(comments.findByPost(new PostId("1")))
.willReturn(Flux.just(Comment.builder().id("comment-id-1").content("comment of my first post").build()));
client.get().uri("/posts/1/comments").exchange()
.expectStatus().isOk()
.expectBody()
.jsonPath("$[0].id").isEqualTo("comment-id-1")
.jsonPath("$[0].content").isEqualTo("comment of my first post");
verify(this.comments, times(1)).findByPost(any(PostId.class));
verifyNoMoreInteractions(this.comments);
}
@Test
public void createCommentOfPost_shouldBeOk() {
Comment comment = Comment.builder().id("comment-id-1").content("content of my first post").createdDate(LocalDateTime.now()).build();
given(comments.save(comment))
.willReturn(Mono.just(comment));
CommentForm form = CommentForm.builder().content("comment of my first post").build();
client.post().uri("/posts/1/comments").body(BodyInserters.fromObject(form))
.exchange()
.expectStatus().isOk()
.expectBody()
.jsonPath("$.id").isEqualTo("comment-id-1")
.jsonPath("$.content").isEqualTo("content of my first post")
.jsonPath("$.createdDate").isNotEmpty();
verify(this.comments, times(1)).save(any(Comment.class));
verifyNoMoreInteractions(this.comments);
}
}
当我 运行 getCommentsByPostId_shouldBeOk 测试时，出现异常：
java.lang.AssertionError: No value at JSON path "$[0].id"
at org.springframework.test.util.JsonPathExpectationsHelper.evaluateJsonPath(JsonPathExpectationsHelper.java:247)
at org.springframework.test.util.JsonPathExpectationsHelper.assertValue(JsonPathExpectationsHelper.java:100)
at org.springframework.test.web.reactive.server.JsonPathAssertions.isEqualTo(JsonPathAssertions.java:49)
at com.example.demo.PostControllerTest.getCommentsByPostId_shouldBeOk(PostControllerTest.java:198)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: com.jayway.jsonpath.PathNotFoundException: No results for path: $[0]['id']
at com.jayway.jsonpath.internal.path.EvaluationContextImpl.getValue(EvaluationContextImpl.java:133)
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:187)
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:345)
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:329)
at org.springframework.test.util.JsonPathExpectationsHelper.evaluateJsonPath(JsonPathExpectationsHelper.java:244)
... 33 more
我试过 curl 的评论 endpionts，还写了 integration tests for it，它有效。
已更新：当我将测试 getCommentsByPostId_shouldBeOk 更改为以下内容时：
EntityExchangeResult<byte[]> results = client.get().uri("/posts/1/comments").exchange()
.expectStatus().isOk()
.expectBody().returnResult();
log.debug("return results::" + new String(results.getResponseBody()));
它打印了一个空的 json 数组：
2018-01-07 11:42:52.385 DEBUG 17492 --- [ main] com.example.demo.PostControllerTest : return results::[]
原因
问题出在您的 mockito 模拟准备中
given(comments.findByPost(new PostId("1")))
.willReturn(Flux.just(...));
此外，请注意，在您的情况下 PostId 的 #equals 和 #hashcode 格式不正确，因此 new PostId("1").eqauls(new PostId("1")) returns false
修复
尝试用下一种方式修复你的 mockito 准备，然后所有期望都会通过
given(comments.findByPost(any()))
.willReturn(Flux.just(Comment.builder().id("comment-id-1").content("comment of my first post").build()));
client.get()
.uri("/posts/1/comments")
.exchange()
.expectStatus().isOk()
.expectBody()
.jsonPath("$[0].id").isEqualTo("comment-id-1")
.jsonPath("$[0].content").isEqualTo("comment of my first post");
verify(this.comments, times(1)).findByPost(any(PostId.class));
verifyNoMoreInteractions(this.comments);
或
将注释 @EqualsAndHashCode 添加到您的 PostId class 以便您当前的代码可以工作
什么时候我使用 @WebFluxTest 在模拟环境中测试我的控制器，并尝试测试 Post 的 Comment 子资源又名 /posts/1/comments, 失败。但是 /posts 相关端点的测试有效。
PostController代码如下，完整代码为here:
@RestController()
@RequestMapping(value = "/posts")
class PostController {
private final PostRepository posts;
private final CommentRepository comments;
public PostController(PostRepository posts, CommentRepository comments) {
this.posts = posts;
this.comments = comments;
}
//other methods for /posts endpoints
@GetMapping("/{id}/comments")
public Flux<Comment> getCommentsOf(@PathVariable("id") String id) {
return this.comments.findByPost(new PostId(id));
}
@PostMapping("/{id}/comments")
public Mono<Comment> createCommentsOf(@PathVariable("id") String id, @RequestBody @Valid CommentForm form) {
Comment comment = Comment.builder()
.post(new PostId(id))
.content(form.getContent())
.build();
return this.comments.save(comment);
}
}
PostControllerTests 如下所示，完整代码为here:
@RunWith(SpringRunner.class)
@WebFluxTest(controllers = PostController.class)
public class PostControllerTest {
@Autowired
WebTestClient client;
@MockBean
PostRepository posts;
@MockBean
CommentRepository comments;
// other tests
@Test
public void getCommentsByPostId_shouldBeOk() {
given(comments.findByPost(new PostId("1")))
.willReturn(Flux.just(Comment.builder().id("comment-id-1").content("comment of my first post").build()));
client.get().uri("/posts/1/comments").exchange()
.expectStatus().isOk()
.expectBody()
.jsonPath("$[0].id").isEqualTo("comment-id-1")
.jsonPath("$[0].content").isEqualTo("comment of my first post");
verify(this.comments, times(1)).findByPost(any(PostId.class));
verifyNoMoreInteractions(this.comments);
}
@Test
public void createCommentOfPost_shouldBeOk() {
Comment comment = Comment.builder().id("comment-id-1").content("content of my first post").createdDate(LocalDateTime.now()).build();
given(comments.save(comment))
.willReturn(Mono.just(comment));
CommentForm form = CommentForm.builder().content("comment of my first post").build();
client.post().uri("/posts/1/comments").body(BodyInserters.fromObject(form))
.exchange()
.expectStatus().isOk()
.expectBody()
.jsonPath("$.id").isEqualTo("comment-id-1")
.jsonPath("$.content").isEqualTo("content of my first post")
.jsonPath("$.createdDate").isNotEmpty();
verify(this.comments, times(1)).save(any(Comment.class));
verifyNoMoreInteractions(this.comments);
}
}
当我 运行 getCommentsByPostId_shouldBeOk 测试时，出现异常：
java.lang.AssertionError: No value at JSON path "$[0].id"
at org.springframework.test.util.JsonPathExpectationsHelper.evaluateJsonPath(JsonPathExpectationsHelper.java:247)
at org.springframework.test.util.JsonPathExpectationsHelper.assertValue(JsonPathExpectationsHelper.java:100)
at org.springframework.test.web.reactive.server.JsonPathAssertions.isEqualTo(JsonPathAssertions.java:49)
at com.example.demo.PostControllerTest.getCommentsByPostId_shouldBeOk(PostControllerTest.java:198)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:73)
at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:83)
at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
at org.junit.runners.ParentRunner.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access[=14=]0(ParentRunner.java:58)
at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268)
at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: com.jayway.jsonpath.PathNotFoundException: No results for path: $[0]['id']
at com.jayway.jsonpath.internal.path.EvaluationContextImpl.getValue(EvaluationContextImpl.java:133)
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:187)
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:345)
at com.jayway.jsonpath.JsonPath.read(JsonPath.java:329)
at org.springframework.test.util.JsonPathExpectationsHelper.evaluateJsonPath(JsonPathExpectationsHelper.java:244)
... 33 more
我试过 curl 的评论 endpionts，还写了 integration tests for it，它有效。
已更新：当我将测试 getCommentsByPostId_shouldBeOk 更改为以下内容时：
EntityExchangeResult<byte[]> results = client.get().uri("/posts/1/comments").exchange()
.expectStatus().isOk()
.expectBody().returnResult();
log.debug("return results::" + new String(results.getResponseBody()));
它打印了一个空的 json 数组：
2018-01-07 11:42:52.385 DEBUG 17492 --- [ main] com.example.demo.PostControllerTest : return results::[]
原因
问题出在您的 mockito 模拟准备中
given(comments.findByPost(new PostId("1")))
.willReturn(Flux.just(...));
此外，请注意，在您的情况下 PostId 的 #equals 和 #hashcode 格式不正确，因此 new PostId("1").eqauls(new PostId("1")) returns false
修复
尝试用下一种方式修复你的 mockito 准备，然后所有期望都会通过
given(comments.findByPost(any()))
.willReturn(Flux.just(Comment.builder().id("comment-id-1").content("comment of my first post").build()));
client.get()
.uri("/posts/1/comments")
.exchange()
.expectStatus().isOk()
.expectBody()
.jsonPath("$[0].id").isEqualTo("comment-id-1")
.jsonPath("$[0].content").isEqualTo("comment of my first post");
verify(this.comments, times(1)).findByPost(any(PostId.class));
verifyNoMoreInteractions(this.comments);
或
将注释 @EqualsAndHashCode 添加到您的 PostId class 以便您当前的代码可以工作