[java-inspections] IDEA-380307 "Fix all 'Code block contains single statement' problems in file" changes semantics

GitOrigin-RevId: 24a924d763405960425c35436372f57ab64a70e9

java/java-analysis-impl/src/com/siyeh/ig/style/SingleStatementInBlockInspection.java

@@ -22,6 +22,7 @@ import com.siyeh.InspectionGadgetsBundle;
 import com.siyeh.ig.BaseInspection;
 import com.siyeh.ig.BaseInspectionVisitor;
 import com.siyeh.ig.psiutils.CommentTracker;
+import com.siyeh.ig.psiutils.ControlFlowUtils;
 import org.jetbrains.annotations.*;
 
 import java.util.Arrays;
@@ -175,6 +176,7 @@ public class SingleStatementInBlockInspection extends BaseInspection implements
         return null;
       }
       if (!(body instanceof PsiBlockStatement block)) return null;
+      if (SingleStatementInBlockVisitor.isDanglingElseProblem(ControlFlowUtils.stripBraces(block), block)) return null;
       return new BlockData(statement, block);
     }
 

java/java-tests/testData/ig/com/siyeh/igfixes/single_statement_block/FixAll.after.java

@@ -0,0 +1,9 @@
+class X {
+  static int test(int[] a) {
+    if (a[0] == 0) <caret>{
+      if (a[1] == 0) return 1;
+      else if (a[1] == 1) return 2;
+    } else return 3;
+    return -1;
+  }
+}

java/java-tests/testData/ig/com/siyeh/igfixes/single_statement_block/FixAll.java

@@ -0,0 +1,11 @@
+class X {
+  static int test(int[] a) {
+    if (a[0] == 0) <caret>{
+      if (a[1] == 0) return 1;
+      else {
+        if (a[1] == 1) return 2;
+      }
+    } else return 3;
+    return -1;
+  }
+}

java/java-tests/testSrc/com/siyeh/ig/fixes/braces/SingleStatementInBlockFixTest.java

@@ -39,6 +39,7 @@ public class SingleStatementInBlockFixTest extends IGQuickFixesTestCase {
   public void testIncompleteIf() { assertQuickfixNotAvailable(getMessage("for")); }
   public void testNestedFor() { assertQuickfixNotAvailable(getMessage("for")); }
   public void testNestedFor2() { doTest("for"); }
+  public void testFixAll() { super.doTest("Fix all 'Code block contains single statement' problems in file");}
   public void testHighlighting() {
     myFixture.configureByText("Test.java", """
       class X {