lava-oushudb-dt-sql-parser/test/parser/spark/visitor.test.ts

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2020-10-28 21:34:13 +08:00
import SQLParser, { SqlBaseVisitor } from '../../../src/parser/spark';
describe('Spark SQL Visitor Tests', () => {
const expectTableName = 'user1';
const sql = `select id,name,sex from ${expectTableName};`;
const parser = new SQLParser();
const parserTree = parser.parse(sql, (error) => {
console.log('Parse error:', error);
});
console.log('Parser tree string:', parser.toString(parserTree));
test('Visitor visitTableName', () => {
let result = '';
class MyVisitor extends SqlBaseVisitor {
visitTableName(ctx): void {
result = ctx.getText().toLowerCase();
super.visitTableName(ctx);
}
}
const visitor: any = new MyVisitor();
visitor.visit(parserTree);
expect(result).toBe(expectTableName);
});
});