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 package org.netbeans.html.boot.impl;

 import java.io.IOException;

 import java.lang.reflect.Field;

 import java.lang.reflect.Method;

 import static org.testng.Assert.assertEquals;

 import static org.testng.Assert.assertTrue;

 import org.testng.annotations.Test;

 /**

  *

  * @author Jaroslav Tulach <jtulach@netbeans.org>

  */

 public class JavaScriptProcesorTest {

     @Test public void detectCallbackToNonExistingClass() throws IOException {

         String code = "package x.y.z;\n"

             + "import net.java.html.js.JavaScriptBody;\n"

             + "class X {\n"

             + "  @JavaScriptBody(args={\"r\"}, javacall=true, body =\n"

             + "    \"r.@java.lang.Runable::run()();\"\n" // typo

             + "  )\n"

             + "  private static native void callback(Runnable r);\n"

             + "}\n";

         Compile c = Compile.create("", code);

         c.assertErrors();

         c.assertError("java.lang.Runable"); // typo

     }

     @Test public void detectCallbackToNonExistingMethod() throws IOException {

         String code = "package x.y.z;\n"

             + "import net.java.html.js.JavaScriptBody;\n"

             + "class X {\n"

             + "  @JavaScriptBody(args={\"r\"}, javacall=true, body =\n"

             + "    \"r.@java.lang.Runnable::cancel()();\"\n"

             + "  )\n"

             + "  private static native void callback(Runnable r);\n"

             + "}\n";

         Compile c = Compile.create("", code);

         c.assertErrors();

         c.assertError("method cancel");

     }

     @Test public void detectCallbackToNonExistingParams() throws IOException {

         String code = "package x.y.z;\n"

             + "import net.java.html.js.JavaScriptBody;\n"

             + "class X {\n"

             + "  @JavaScriptBody(args={\"r\"}, javacall=true, body =\n"

             + "    \"r.@java.lang.Runnable::run(I)(10);\"\n"

             + "  )\n"

             + "  private static native void callback(Runnable r);\n"

             + "}\n";

         Compile c = Compile.create("", code);

         c.assertErrors();

         c.assertError("wrong parameters: (I)");

     }

     @Test public void objectTypeParamsAreOK() throws IOException {

         String code = "package x.y.z;\n"

             + "import net.java.html.js.JavaScriptBody;\n"

             + "class X {\n"

             + "  @JavaScriptBody(args={\"r\"}, javacall=true, body =\n"

             + "    \"r.@java.lang.Object::equals(Ljava/lang/Object;)(null);\"\n"

             + "  )\n"

             + "  private static native void testEqual(Object r);\n"

             + "}\n";

         Compile c = Compile.create("", code);

         c.assertNoErrors();

     }

     @Test public void needJavaScriptBodyToUseResource() throws IOException {

         String code = "package x.y.z;\n"

             + "import net.java.html.js.JavaScriptResource;\n"

             + "@JavaScriptResource(\"x.html\")\n"

             + "class X {\n"

             + "  private static native void callback(Runnable r);\n"

             + "}\n";

         Compile c = Compile.create("", code);

         c.assertErrors();

         c.assertError("needs @JavaScriptBody");

     }

     @Test public void generatesCallbacksThatReturnObject() throws Exception {

         Class<?> callbacksForTestPkg = Class.forName("org.netbeans.html.boot.impl.$JsCallbacks$");

         Method m = callbacksForTestPkg.getDeclaredMethod("java_lang_Runnable$run$", Runnable.class);

         assertEquals(m.getReturnType(), Object.class, "All methods always return object");

     }

     @Test public void hasInstanceField() throws Exception {

         Class<?> callbacksForTestPkg = Class.forName("org.netbeans.html.boot.impl.$JsCallbacks$");

         Field f = callbacksForTestPkg.getDeclaredField("VM");

         f.setAccessible(true);

         assertTrue(callbacksForTestPkg.isInstance(f.get(null)), "Singleton field VM");

     }

 }