Adapt DSLTest.legacyStage to test only the special case

Author: jglick

plugin/pom.xml

@@ -55,6 +55,11 @@
                 <scope>import</scope>
                 <type>pom</type>
             </dependency>
+            <dependency>
+                <groupId>org.jenkins-ci.plugins</groupId>
+                <artifactId>pipeline-stage-step</artifactId>
+                <version>303.v50e56cdd58d9</version> <!-- TODO https://github.com/jenkinsci/pipeline-stage-step-plugin/pull/94 -->
+            </dependency>
         </dependencies>
     </dependencyManagement>
     <dependencies>

plugin/src/test/java/org/jenkinsci/plugins/workflow/cps/DSLTest.java

@@ -600,7 +600,10 @@ public void namedSoleParamForStep() throws Exception {
         p.setDefinition(new CpsFlowDefinition(
                 "stage(name: 'A');\n" +
                         "echo('done')", true));
-        WorkflowRun b = r.assertBuildStatusSuccess(p.scheduleBuild2(0));
+        WorkflowRun b = r.waitForCompletion(p.scheduleBuild2(0).waitForStart());
+        r.assertLogContains(org.jenkinsci.plugins.workflow.support.steps.stage.Messages.StageStepExecution_non_block_mode_deprecated(), b);
+        // Special case in DSL.invokeStep:
+        r.assertLogNotContains("stage step must be called with a body", b);
     }
 
     @Test public void standardStage() throws Exception {