IDEABKL-4394 Automatically remove redundant result variable when inlining the method

java/java-tests/testData/refactoring/inlineMethod/InlineWithTry.java.after

@@ -1,8 +1,6 @@
 class A {
     {
-        int result;
         try {
-            result = 0;
         } catch (Error e) {
             throw e;
         }

java/java-tests/testData/refactoring/inlineMethod/PreserveResultedVariableIfInitializerIsNotSideEffectsFree.java.after

@@ -19,8 +19,9 @@ class Main {
 
   public final void doSomething(Object obj) {
     try {
-        Object result;
-        result = null == null ? fooBar() : null;
+        if (null == null) {
+            fooBar();
+        }
     } catch (Exception e) {
       e.printStackTrace();
     }

java/java-tests/testData/refactoring/inlineMethod/RawSubstitution.java.after

@@ -4,12 +4,11 @@ public class NotRaw<T> {
 
 class Raw extends NotRaw {
     void foo() {
-        Object result;
+        Object o;
         Object tt = null;
         if ( null == null) {
-            result = null;
+            o = null;
         }           else
-            result = null;
-        Object o = result;
+            o = null;
     }
 }

java/java-tests/testData/refactoring/inlineMethod/ReuseResultVar.java

@@ -0,0 +1,16 @@
+import java.util.*;
+
+class Test {
+  void useTest() {
+    String color = <caret>makeColor(Math.random() > 0.5);
+    System.out.println("Color is " + color);
+  }
+
+  private String makeColor(boolean b) {
+    if (b) {
+      return "Foo";
+    } else {
+      return "Fie";
+    }
+  }
+}

java/java-tests/testData/refactoring/inlineMethod/ReuseResultVar.java.after

@@ -0,0 +1,12 @@
+class Test {
+  void useTest() {
+      String color;
+      if (Math.random() > 0.5) {
+          color = "Foo";
+      } else {
+          color = "Fie";
+      }
+      System.out.println("Color is " + color);
+  }
+
+}

java/java-tests/testData/refactoring/inlineMethod/SingleReturn1.java

@@ -8,7 +8,7 @@ class Tester {
     }
 
     void caller(String v) {
-        String g = <caret>callee(v);
+        final String g = <caret>callee(v);
         System.out.println(g);
     }
 }

java/java-tests/testData/refactoring/inlineMethod/SingleReturn1.java.after

@@ -1,11 +1,10 @@
 class Tester {
 
     void caller(String v) {
-        String result = null;
+        String g = null;
         if (v != null) {
-            result = v;
+            g = v;
         }
-        String g = result;
         System.out.println(g);
     }
 }

java/java-tests/testData/refactoring/inlineMethod/SingleReturn1NotFinal.java

@@ -0,0 +1,14 @@
+class Tester {
+    // IDEA-37432
+    String callee(String x) {
+        if (x == null) {
+            return null;
+        }
+        return x;
+    }
+
+    void caller(String v) {
+        String g = <caret>callee(v);
+        Runnable r = () -> System.out.println(g);
+    }
+}

java/java-tests/testData/refactoring/inlineMethod/SingleReturn1NotFinal.java.after

@@ -0,0 +1,11 @@
+class Tester {
+
+    void caller(String v) {
+        String result = null;
+        if (v != null) {
+            result = v;
+        }
+        String g = result;
+        Runnable r = () -> System.out.println(g);
+    }
+}