public void testBug128818() throws Exception {

    IPackageFragment pack1 = this.sourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("function foo() {\n");
    buf.append("  if (true) {\n");
    buf.append("  } // comment\n");
    buf.append("  else\n");
    buf.append("    return;\n");
    buf.append("}\n");
    IJavaScriptUnit cu = pack1.createCompilationUnit("E.js", buf.toString(), false, null);

    JavaScriptUnit astRoot = createAST3(cu);
    ASTRewrite rewrite = ASTRewrite.create(astRoot.getAST());

    AST ast = astRoot.getAST();

    assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
    FunctionDeclaration function = findMethodDeclaration(astRoot, "foo");
    IfStatement statement = (IfStatement) function.getBody().statements().get(0);

    rewrite.set(statement, IfStatement.ELSE_STATEMENT_PROPERTY, ast.newBlock(), null);

    String preview = evaluateRewrite(cu, rewrite);

    buf = new StringBuffer();
    buf.append("function foo() {\n");
    buf.append("  if (true) {\n");
    buf.append("  } // comment\n");
    buf.append(" else {\n");
    buf.append("}\n");
    buf.append("}\n");
    assertEqualString(preview, buf.toString());
  }
  public void testCatchClause() throws Exception {
    IPackageFragment pack1 = this.sourceFolder.createPackageFragment("test1", false, null);
    StringBuffer buf = new StringBuffer();
    buf.append("function foo() {\n");
    buf.append("    try {\n");
    buf.append("    } catch (e) {\n");
    buf.append("    }\n");
    buf.append("}\n");
    IJavaScriptUnit cu = pack1.createCompilationUnit("E.js", buf.toString(), false, null);

    JavaScriptUnit astRoot = createAST(cu);
    ASTRewrite rewrite = ASTRewrite.create(astRoot.getAST());

    AST ast = astRoot.getAST();

    assertTrue("Parse errors", (astRoot.getFlags() & ASTNode.MALFORMED) == 0);
    FunctionDeclaration methodDecl = findMethodDeclaration(astRoot, "foo");
    Block block = methodDecl.getBody();
    List statements = block.statements();
    assertTrue("Number of statements not 3", statements.size() == 1);
    List catchClauses = ((TryStatement) statements.get(0)).catchClauses();
    assertTrue("Number of catchClauses not 1", catchClauses.size() == 1);
    { // change exception type
      CatchClause clause = (CatchClause) catchClauses.get(0);

      SingleVariableDeclaration exception = clause.getException();

      SingleVariableDeclaration newException = ast.newSingleVariableDeclaration();

      newException.setName(ast.newSimpleName("ex"));

      rewrite.replace(exception, newException, null);
    }
    { // change body
      CatchClause clause = (CatchClause) catchClauses.get(0);
      Block body = clause.getBody();

      Block newBody = ast.newBlock();
      ReturnStatement returnStatement = ast.newReturnStatement();
      newBody.statements().add(returnStatement);

      rewrite.replace(body, newBody, null);
    }

    String preview = evaluateRewrite(cu, rewrite);

    buf = new StringBuffer();
    buf.append("function foo() {\n");
    buf.append("    try {\n");
    buf.append("    } catch (ex) {\n");
    buf.append("        return;\n");
    buf.append("    }\n");
    buf.append("}\n");
    assertEqualString(preview, buf.toString());
  }