jaroslav@1433: package ${package};
jaroslav@1433: 
jaroslav@1433: import java.io.Closeable;
jaroslav@1433: import java.io.Reader;
jaroslav@1433: import java.net.URL;
jaroslav@1433: import java.util.ArrayList;
jaroslav@1433: import java.util.List;
jaroslav@1433: import javax.script.Invocable;
jaroslav@1433: import javax.script.ScriptEngine;
jaroslav@1433: import javax.script.ScriptEngineManager;
jaroslav@1433: import javax.script.ScriptException;
jaroslav@1433: import org.apidesign.html.boot.spi.Fn;
jaroslav@1433: import static org.testng.Assert.assertEquals;
jaroslav@1433: import org.testng.annotations.AfterMethod;
jaroslav@1433: import org.testng.annotations.BeforeMethod;
jaroslav@1433: import org.testng.annotations.Test;
jaroslav@1433: 
jaroslav@1433: /** Tests for behavior of @JavaScriptBody methods. Set your JavaScript 
jaroslav@1433:  * environment up (for example define <code>alert</code> or use some
jaroslav@1433:  * emulation library like <em>env.js</em>), register script presenter 
jaroslav@1433:  * and then you can call methods that deal with JavaScript in your tests.
jaroslav@1433:  */
jaroslav@1433: public class JsInteractionTest {
jaroslav@1433:     private Closeable jsEngine;
jaroslav@1433:     @BeforeMethod public void initializeJSEngine() throws Exception {
jaroslav@1433:         jsEngine = Fn.activate(new ScriptPresenter());
jaroslav@1433:     }
jaroslav@1433:     
jaroslav@1433:     @AfterMethod public void shutdownJSEngine() throws Exception {
jaroslav@1433:         jsEngine.close();
jaroslav@1433:     }
jaroslav@1433:     
jaroslav@1433:     @Test public void testCallbackFromJavaScript() throws Exception {
jaroslav@1433:         class R implements Runnable {
jaroslav@1433:             int called;
jaroslav@1433: 
jaroslav@1433:             @Override
jaroslav@1433:             public void run() {
jaroslav@1433:                 called++;
jaroslav@1433:             }
jaroslav@1433:         }
jaroslav@1433:         R callback = new R();
jaroslav@1433:         
jaroslav@1433:         DataModel.confirmByUser("Hello", callback);
jaroslav@1433:         
jaroslav@1433:         assertEquals(callback.called, 1, "One immediate callback");
jaroslav@1433:     }
jaroslav@1433: 
jaroslav@1433:     private static class ScriptPresenter implements Fn.Presenter {
jaroslav@1433:         private final ScriptEngine eng;
jaroslav@1433:         
jaroslav@1433:         public ScriptPresenter() throws ScriptException {
jaroslav@1433:             eng = new ScriptEngineManager().getEngineByName("javascript");
jaroslav@1433:             eng.eval("function alert(msg) { Packages.java.lang.System.out.println(msg); };");
jaroslav@1433:         }
jaroslav@1433: 
jaroslav@1433:         @Override
jaroslav@1433:         public Fn defineFn(String code, String... names) {
jaroslav@1433:             StringBuilder sb = new StringBuilder();
jaroslav@1433:             sb.append("(function() {");
jaroslav@1433:             sb.append("  return function(");
jaroslav@1433:             String sep = "";
jaroslav@1433:             for (String n : names) {
jaroslav@1433:                 sb.append(sep).append(n);
jaroslav@1433:                 sep = ",";
jaroslav@1433:             }
jaroslav@1433:             sb.append(") {\n");
jaroslav@1433:             sb.append(code);
jaroslav@1433:             sb.append("};");
jaroslav@1433:             sb.append("})()");
jaroslav@1433:             
jaroslav@1433:             final Object fn;
jaroslav@1433:             try {
jaroslav@1433:                 fn = eng.eval(sb.toString());
jaroslav@1433:             } catch (ScriptException ex) {
jaroslav@1433:                 throw new IllegalStateException(ex);
jaroslav@1433:             }
jaroslav@1433:             return new Fn(this) {
jaroslav@1433:                 @Override
jaroslav@1433:                 public Object invoke(Object thiz, Object... args) throws Exception {
jaroslav@1433:                     List<Object> all = new ArrayList<Object>(args.length + 1);
jaroslav@1433:                     all.add(thiz == null ? fn : thiz);
jaroslav@1433:                     for (int i = 0; i < args.length; i++) {
jaroslav@1433:                         all.add(args[i]);
jaroslav@1433:                     }
jaroslav@1433:                     Object ret = ((Invocable)eng).invokeMethod(fn, "call", all.toArray()); // NOI18N
jaroslav@1433:                     return fn.equals(ret) ? null : thiz;
jaroslav@1433:                 }
jaroslav@1433:             };
jaroslav@1433:         }
jaroslav@1433: 
jaroslav@1433:         @Override
jaroslav@1433:         public void displayPage(URL page, Runnable onPageLoad) {
jaroslav@1433:             // not really displaying anything
jaroslav@1433:             onPageLoad.run();
jaroslav@1433:         }
jaroslav@1433: 
jaroslav@1433:         @Override
jaroslav@1433:         public void loadScript(Reader code) throws Exception {
jaroslav@1433:             eng.eval(code);
jaroslav@1433:         }
jaroslav@1433:     }
jaroslav@1433: }