Avoid IllegalArgumentException in getBuildStatusSummary() if run is still building

core/src/main/java/hudson/model/ResultTrend.java

@@ -96,7 +96,7 @@ public enum ResultTrend {
     /**
      * Returns the result trend of a build.
      * 
-     * @param build the current build
+     * @param build the build
      * @return the result trend
      */
     public static ResultTrend getResultTrend(AbstractBuild<?, ?> build) {
@@ -106,7 +106,7 @@ public enum ResultTrend {
     /**
      * Returns the result trend of a run.
      * 
-     * @param run the current run
+     * @param run the run
      * @return the result trend
      * 
      * @since 1.441

core/src/main/java/hudson/model/Run.java

@@ -1626,6 +1626,10 @@ public abstract class Run <JobT extends Job<JobT,RunT>,RunT extends Run<JobT,Run
      * (especially in comparison with the previous build.)
      */
     public Summary getBuildStatusSummary() {
+        if (isBuilding()) {
+            return new Summary(false, Messages.Run_Summary_Unknown());
+        }
+        
         ResultTrend trend = ResultTrend.getResultTrend(this);
         
         switch (trend) {

core/src/test/java/hudson/model/BuildStatusSummaryTest.java

@@ -36,6 +36,15 @@ public class BuildStatusSummaryTest {
         when(this.build.getBuildStatusSummary()).thenCallRealMethod();
     }
     
+    @Test
+    public void testStatusUnknownIfRunIsStillBuilding() {
+        when(this.build.getResult()).thenReturn(null);
+        when(this.build.isBuilding()).thenReturn(true);
+        
+        Summary summary = this.build.getBuildStatusSummary();
+        assertEquals(Messages.Run_Summary_Unknown(), summary.message);
+    }
+    
     @Test
     public void testSuccess() {
         when(this.build.getResult()).thenReturn(Result.SUCCESS);