LexicalBindingTest.java 文件源码

/**
 * Make sure lexically defined variables are accessible in other scripts.
 */
@Test
public void lexicalScopeTest() throws ScriptException {
    final NashornScriptEngineFactory factory = new NashornScriptEngineFactory();
    final ScriptEngine e = factory.getScriptEngine(LANGUAGE_ES6);

    e.eval("let x; const y = 'world';");

    assertEquals(e.eval("x = 'hello'"), "hello");
    assertEquals(e.eval("typeof x"), "string");
    assertEquals(e.eval("typeof y"), "string");
    assertEquals(e.eval("x"), "hello");
    assertEquals(e.eval("y"), "world");
    assertEquals(e.eval("typeof this.x"), "undefined");
    assertEquals(e.eval("typeof this.y"), "undefined");
    assertEquals(e.eval("this.x"), null);
    assertEquals(e.eval("this.y"), null);
}