Set an issue to Unassigned

hugo/content/changelog.md

@@ -6,6 +6,7 @@ lastmodifierdisplayname = "Naresh Rayapati"
 +++
 
 * #### **1.4.5** (Unreleased)
+  * Use 'null' as assignee to set an issue to unassigned.
 
 * #### **1.4.4**
   * [JENKINS-53044](https://issues.jenkins-ci.org/browse/JENKINS-53044) Add step to retrieve jira server info.

hugo/content/steps/issue/jira_assign_issue.md

@@ -4,7 +4,7 @@ description = "More about jiraAssignIssue step."
 tags = ["steps", "issue"]
 weight = 4
 date = "2017-11-12"
-lastmodifierdisplayname = "Naresh Rayapati"
+lastmodifierdisplayname = "Benedikt Hr"
 +++
 
 ### jiraAssignIssue
@@ -60,3 +60,8 @@ It supports all the fields that any jira instance supports including custom fiel
     ```groovy
     jiraAssignIssue site: 'LOCAL', idOrKey: 'TEST-1', userName: 'Jenkins'
     ```
+* A null name will remove the assignee.
+
+    ```groovy
+    jiraAssignIssue site: 'LOCAL', idOrKey: 'TEST-1', userName: null
+    ```

src/main/java/org/thoughtslive/jenkins/plugins/jira/service/JiraService.java

@@ -15,6 +15,7 @@
 import okhttp3.OkHttpClient;
 import okhttp3.RequestBody;
 import okhttp3.ResponseBody;
+import com.google.common.collect.Maps;
 import org.thoughtslive.jenkins.plugins.jira.Site;
 import org.thoughtslive.jenkins.plugins.jira.api.ResponseData;
 import org.thoughtslive.jenkins.plugins.jira.login.SigningInterceptor;
@@ -153,9 +154,11 @@ public ResponseData<Object> updateIssue(final String issueIdOrKey, final Object
 
   public ResponseData<Void> assignIssue(final String issueIdorKey, final String userName) {
     try {
+      Map input = Maps.newHashMap();
+      input.put("name", userName);
       return parseResponse(
           jiraEndPoints
-              .assignIssue(issueIdorKey, ImmutableMap.builder().put("name", userName).build())
+              .assignIssue(issueIdorKey, input)
               .execute());
     } catch (Exception e) {
       return buildErrorResponse(e);

src/main/java/org/thoughtslive/jenkins/plugins/jira/steps/AssignIssueStep.java

@@ -87,14 +87,13 @@ protected <T> ResponseData<T> verifyInput() throws Exception {
 
       if (response == null) {
         final String idOrKey = Util.fixEmpty(step.getIdOrKey());
-        final String userName = Util.fixEmpty(step.getUserName());
 
         if (idOrKey == null) {
           errorMessage = "idOrKey is empty or null.";
         }
 
-        if (userName == null) {
-          errorMessage = "userName is empty or null.";
+        if (step.getUserName() != null && step.getUserName().isEmpty()) {
+          errorMessage = "userName is empty.";
         }
 
         if (errorMessage != null) {

src/test/java/org/thoughtslive/jenkins/plugins/jira/steps/AssignIssueStepTest.java

@@ -101,10 +101,24 @@ public void testWithEmptyCommentThrowsAbortException() throws Exception {
     // Execute and assert Test.
     assertThatExceptionOfType(AbortException.class).isThrownBy(() -> {
       stepExecution.run();
-    }).withMessage("userName is empty or null.").withStackTraceContaining("AbortException")
+    }).withMessage("userName is empty.").withStackTraceContaining("AbortException")
         .withNoCause();
   }
 
+  @Test
+  public void testSuccessfulUnassignIssue() throws Exception {
+    final AssignIssueStep step = new AssignIssueStep("TEST-1", null);
+    stepExecution = new AssignIssueStep.Execution(step, contextMock);
+    ;
+
+    // Execute Test.
+    stepExecution.run();
+
+    // Assert Test
+    verify(jiraServiceMock, times(1)).assignIssue("TEST-1", null);
+    assertThat(step.isFailOnError()).isEqualTo(true);
+  }
+
   @Test
   public void testSuccessfulAssignIssue() throws Exception {
     final AssignIssueStep step = new AssignIssueStep("TEST-1", "testUser");