add NotNull

plugins/coverage-common/src/com/intellij/coverage/CoverageProjectViewDirectoryNodeDecorator.java

@@ -54,8 +54,8 @@ final class CoverageProjectViewDirectoryNodeDecorator extends AbstractCoveragePr
     final CoverageDataManager manager = getCoverageDataManager();
     if (manager == null) return;
     final CoverageSuitesBundle currentSuite = manager.getCurrentSuitesBundle();
-    final CoverageAnnotator coverageAnnotator = currentSuite != null ? currentSuite.getAnnotator(node.getProject())
-                                                                     : null;
+    Project project = node.getProject();
+    final CoverageAnnotator coverageAnnotator = currentSuite == null || project == null ? null : currentSuite.getAnnotator(project);
     if (coverageAnnotator == null) {
       // N/A
       return;

plugins/coverage-common/src/com/intellij/coverage/CoverageSuitesBundle.java

@@ -1,3 +1,4 @@
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.coverage;
 
 import com.intellij.execution.configurations.ModuleBasedConfiguration;
@@ -130,7 +131,7 @@ public class CoverageSuitesBundle {
     return myEngine.getLineMarkerRenderer(lineNumber, className, lines, coverageByTestApplicable, coverageSuite, newToOldConverter, oldToNewConverter, subCoverageActive);
   }
 
-  public CoverageAnnotator getAnnotator(Project project) {
+  public CoverageAnnotator getAnnotator(@NotNull Project project) {
     return myEngine.getCoverageAnnotator(project);
   }
 
@@ -188,7 +189,7 @@ public class CoverageSuitesBundle {
         () -> new CachedValueProvider.Result<>(getSearchScopeInner(project), ProjectRootModificationTracker.getInstance(project)), false);
     }
     return myCachedValue.getValue();
-    
+
   }
 
   private GlobalSearchScope getSearchScopeInner(Project project) {

plugins/coverage/src/com/intellij/coverage/JavaCoverageEngine.java

@@ -1,4 +1,4 @@
-// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+// Copyright 2000-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
 package com.intellij.coverage;
 
 import com.intellij.CommonBundle;
@@ -253,7 +253,7 @@ public class JavaCoverageEngine extends CoverageEngine {
 
   @NotNull
   @Override
-  public CoverageAnnotator getCoverageAnnotator(Project project) {
+  public CoverageAnnotator getCoverageAnnotator(@NotNull Project project) {
     return JavaCoverageAnnotator.getInstance(project);
   }
 
@@ -614,7 +614,7 @@ public class JavaCoverageEngine extends CoverageEngine {
     TestFramework testFramework = TestFrameworks.detectFramework(psiClass);
     if (testFramework == null) return;
     Arrays.stream(psiClass.getAllMethods())
-      .filter(method -> testFramework.isTestMethod(method) && 
+      .filter(method -> testFramework.isTestMethod(method) &&
                         testName.equals(CoverageListener.sanitize(method.getName(), className.length())))
       .forEach(elements::add);
   }