IDEA-121138 Tab completion does not work in autopopup

java/java-tests/testData/codeInsight/template/postfix/completion/tabCompletionWithTemplatesInAutopopup.java

@@ -0,0 +1,9 @@
+public class Foo {
+    void m() {
+        new MyClass()<caret>
+    }
+  
+    private class MyClass {
+      public void parents() {}
+    }
+}

java/java-tests/testData/codeInsight/template/postfix/completion/tabCompletionWithTemplatesInAutopopup_after.java

@@ -0,0 +1,9 @@
+public class Foo {
+    void m() {
+        new MyClass().parents();<caret>
+    }
+  
+    private class MyClass {
+      public void parents() {}
+    }
+}

java/java-tests/testSrc/com/intellij/codeInsight/template/postfix/completion/TemplatesCompletionTest.java

@@ -143,6 +143,18 @@ public class TemplatesCompletionTest extends CompletionAutoPopupTestCase {
     type("r");
     myFixture.assertPreferredCompletionItems(selectedIndex, ".par", "parents");
   }
+  
+  public void testTabCompletionWithTemplatesInAutopopup() {
+    LiveTemplateCompletionContributor.ourShowTemplatesInTests = true;
+    
+    configureByFile();
+    type(".");
+    myFixture.assertPreferredCompletionItems(0, "parents");
+
+    type("\t");
+    assertNull(getLookup());
+    checkResultByFile();
+  }
 
   @Override
   protected String getBasePath() {