IDEA-87104 Code completion should remember and prefer chosen variants

java/java-tests/testData/codeInsight/completion/normalSorting/SameStatsForDifferentQualifiersJComponent.java

@@ -0,0 +1,9 @@
+import javax.swing.*;
+
+public class MyFirstTestClassFoo {
+
+  void foo(JComponent c) {
+    c.getCom<caret>x
+  }
+
+}

java/java-tests/testData/codeInsight/completion/normalSorting/SameStatsForDifferentQualifiersJLabel.java

@@ -0,0 +1,9 @@
+import javax.swing.*;
+
+public class MyFirstTestClassFoo {
+
+  void foo(JLabel l) {
+    l.getCompo<caret>x
+  }
+
+}

java/java-tests/testSrc/com/intellij/codeInsight/completion/NormalCompletionOrderingTest.groovy

@@ -13,6 +13,7 @@ import com.intellij.codeInsight.lookup.impl.LookupImpl
 import com.intellij.ide.ui.UISettings
 import com.intellij.psi.PsiClass
 import com.intellij.psi.PsiMethod
+import com.intellij.openapi.fileEditor.FileDocumentManager
 
 public class NormalCompletionOrderingTest extends CompletionSortingTestCase {
   private static final String BASE_PATH = "/codeInsight/completion/normalSorting";
@@ -148,6 +149,32 @@ public class NormalCompletionOrderingTest extends CompletionSortingTestCase {
     assertPreferredItems(0, "FooBee", "FooBar");
   }
 
+  public void testSameStatsForDifferentQualifiers() throws Throwable {
+    invokeCompletion("SameStatsForDifferentQualifiersJLabel.java");
+    assertPreferredItems(0, "getComponent");
+    incUseCount(getLookup(), myFixture.lookupElementStrings.indexOf('getComponents'));
+    FileDocumentManager.instance.saveAllDocuments()
+
+    invokeCompletion("SameStatsForDifferentQualifiersJLabel.java");
+    assertPreferredItems(1, "getComponent", "getComponents");
+
+    invokeCompletion("SameStatsForDifferentQualifiersJComponent.java");
+    assertPreferredItems(1, "getComponent", "getComponents");
+  }
+
+  public void testSameStatsForDifferentQualifiers2() throws Throwable {
+    invokeCompletion("SameStatsForDifferentQualifiersJComponent.java");
+    assertPreferredItems(0, "getComponent");
+    incUseCount(getLookup(), myFixture.lookupElementStrings.indexOf('getComponents'));
+    FileDocumentManager.instance.saveAllDocuments()
+
+    invokeCompletion("SameStatsForDifferentQualifiersJComponent.java");
+    assertPreferredItems(1, "getComponent", "getComponents");
+
+    invokeCompletion("SameStatsForDifferentQualifiersJLabel.java");
+    assertPreferredItems(1, "getComponent", "getComponents");
+  }
+
   public void testDispreferFinalize() throws Throwable {
     checkPreferredItems(0, "final", "finalize");
   }