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());
}
