IDEA-161007 Add new inspection to make comparator lambdas use Comparator.comparing() combinators (Currently only simple comparators supported)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/comparatorCombinators/afterSimple.java

@@ -0,0 +1,14 @@
+// "Replace with Comparator.comparing" "true"
+
+import java.util.Comparator;
+import java.util.List;
+
+public class Main {
+  interface Person {
+    String getName();
+  }
+
+  void sort(List<Person> persons) {
+    persons.sort(Comparator.comparing(Person::getName));
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/comparatorCombinators/beforeInverted.java

@@ -0,0 +1,13 @@
+// "Replace with Comparator.comparing" "false"
+
+import java.util.List;
+
+public class Main {
+  interface Person {
+    String getName();
+  }
+
+  void sort(List<Person> persons) {
+    persons.sort((p1, p2) -> p2.getNam<caret>e().compareTo(p1.getName()));
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/comparatorCombinators/beforeSimple.java

@@ -0,0 +1,13 @@
+// "Replace with Comparator.comparing" "true"
+
+import java.util.List;
+
+public class Main {
+  interface Person {
+    String getName();
+  }
+
+  void sort(List<Person> persons) {
+    persons.sort((p1, p2) -> p1.getNam<caret>e().compareTo(p2.getName()));
+  }
+}

java/java-tests/testSrc/com/intellij/codeInsight/daemon/quickFix/ComparatorCombinatorsInspectionTest.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright 2000-2016 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.intellij.codeInsight.daemon.quickFix;
+
+import com.intellij.codeInspection.ComparatorCombinatorsInspection;
+import com.intellij.codeInspection.LocalInspectionTool;
+import org.jetbrains.annotations.NotNull;
+
+
+public class ComparatorCombinatorsInspectionTest extends LightQuickFixParameterizedTestCase {
+  @NotNull
+  @Override
+  protected LocalInspectionTool[] configureLocalInspectionTools() {
+    return new LocalInspectionTool[]{
+      new ComparatorCombinatorsInspection()
+    };
+  }
+
+  public void test() throws Exception { doAllTests(); }
+
+  @Override
+  protected String getBasePath() {
+    return "/codeInsight/daemonCodeAnalyzer/quickFix/comparatorCombinators";
+  }
+}