NewOperatorTest.java

package org.dynjs.runtime;

import static org.fest.assertions.Assertions.*;

import org.dynjs.exception.ThrowException;
import org.junit.Test;

public class NewOperatorTest extends AbstractDynJSTestSupport {

    @Test(expected=ThrowException.class)
    public void testInvalidNew() {
        eval( "new new Boolean(true)" );
    }
    
    @Test
    public void testNew() {
        eval("var y;",
                "function Thing(){ y = this };",
                " var z = { ctor: Thing };",
                "var x = new z.ctor(42);");

        JSObject x = (JSObject) getContext().resolve("x").getValue(getContext());
        JSFunction thing = (JSFunction) getContext().resolve("Thing").getValue(getContext());

        JSObject y = (JSObject) getContext().resolve("y").getValue(getContext());

        assertThat(y).isSameAs(x);
    }

    @Test
    public void testNewWithoutParens() {
        eval("var y;",
                "function Thing(){ y = this };",
                "var x = new Thing;");

        JSObject x = (JSObject) getContext().resolve("x").getValue(getContext());
        JSFunction thing = (JSFunction) getContext().resolve("Thing").getValue(getContext());

        JSObject y = (JSObject) getContext().resolve("y").getValue(getContext());

        assertThat(y).isSameAs(x);
    }

    @Test
    public void testNewSettingThisProps() {
        eval("function Thing(){ this.taco='fish'; };",
                "var x = new Thing();");

        JSObject x = (JSObject) getContext().resolve("x").getValue(getContext());
        Object result = x.get(getContext(), "taco");
        assertThat(result).isEqualTo("fish");
    }
    
    

}