Support moving into "else" branch of conditional expression

#KT-3877 Fixed

idea/src/org/jetbrains/jet/plugin/codeInsight/upDownMover/JetExpressionMover.java

@@ -219,6 +219,13 @@ public class JetExpressionMover extends AbstractJetUpDownMover {
 
     @Nullable
     private static LineRange getExpressionTargetRange(@NotNull Editor editor, @NotNull PsiElement sibling, boolean down) {
+        if (sibling instanceof JetIfExpression && !down) {
+            JetExpression elseBranch = ((JetIfExpression) sibling).getElse();
+            if (elseBranch instanceof JetBlockExpression) {
+                sibling = elseBranch;
+            }
+        }
+
         PsiElement start = sibling;
         PsiElement end = sibling;
 

idea/testData/codeInsight/moveUpDown/expressions/intoElse1.kt

@@ -0,0 +1,10 @@
+// MOVE: down
+
+fun foo(x: Boolean) {
+    if (x) {
+        <caret>println(x)
+    }
+    else {
+
+    }
+}

idea/testData/codeInsight/moveUpDown/expressions/intoElse1.kt.after

@@ -0,0 +1,10 @@
+// MOVE: down
+
+fun foo(x: Boolean) {
+    if (x) {
+    }
+    else {
+        <caret>println(x)
+
+    }
+}

idea/testData/codeInsight/moveUpDown/expressions/intoElse2.kt

@@ -0,0 +1,11 @@
+// MOVE: up
+
+fun foo(x: Boolean) {
+    if (x) {
+
+    }
+    else {
+
+    }
+    <caret>println(x)
+}

idea/testData/codeInsight/moveUpDown/expressions/intoElse2.kt.after

@@ -0,0 +1,11 @@
+// MOVE: up
+
+fun foo(x: Boolean) {
+    if (x) {
+
+    }
+    else {
+
+        <caret>println(x)
+    }
+}

idea/testData/codeInsight/moveUpDown/expressions/outOfElse1.kt

@@ -0,0 +1,10 @@
+// MOVE: up
+
+fun foo(x: Boolean) {
+    if (x) {
+
+    }
+    else {
+        <caret>println(x)
+    }
+}

idea/testData/codeInsight/moveUpDown/expressions/outOfElse1.kt.after

@@ -0,0 +1,10 @@
+// MOVE: up
+
+fun foo(x: Boolean) {
+    if (x) {
+
+        <caret>println(x)
+    }
+    else {
+    }
+}

idea/testData/codeInsight/moveUpDown/expressions/outOfElse2.kt

@@ -0,0 +1,10 @@
+// MOVE: down
+
+fun foo(x: Boolean) {
+    if (x) {
+
+    }
+    else {
+        <caret>println(x)
+    }
+}

idea/testData/codeInsight/moveUpDown/expressions/outOfElse2.kt.after

@@ -0,0 +1,10 @@
+// MOVE: down
+
+fun foo(x: Boolean) {
+    if (x) {
+
+    }
+    else {
+    }
+    <caret>println(x)
+}

idea/tests/org/jetbrains/jet/plugin/codeInsight/moveUpDown/CodeMoverTestGenerated.java

@@ -932,6 +932,16 @@ public class CodeMoverTestGenerated extends AbstractCodeMoverTest {
             doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/intoClosureWithParams1.kt");
         }
         
+        @TestMetadata("intoElse1.kt")
+        public void testIntoElse1() throws Exception {
+            doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/intoElse1.kt");
+        }
+        
+        @TestMetadata("intoElse2.kt")
+        public void testIntoElse2() throws Exception {
+            doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/intoElse2.kt");
+        }
+        
         @TestMetadata("intoNestedClosure1.kt")
         public void testIntoNestedClosure1() throws Exception {
             doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/intoNestedClosure1.kt");
@@ -1007,6 +1017,16 @@ public class CodeMoverTestGenerated extends AbstractCodeMoverTest {
             doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/outOfClosureWithParams1.kt");
         }
         
+        @TestMetadata("outOfElse1.kt")
+        public void testOutOfElse1() throws Exception {
+            doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/outOfElse1.kt");
+        }
+        
+        @TestMetadata("outOfElse2.kt")
+        public void testOutOfElse2() throws Exception {
+            doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/outOfElse2.kt");
+        }
+        
         @TestMetadata("outOfNestedClosure1.kt")
         public void testOutOfNestedClosure1() throws Exception {
             doTestExpression("idea/testData/codeInsight/moveUpDown/expressions/outOfNestedClosure1.kt");