Add an example using an interface

Author: peter-lawrey

compiler/src/test/java/mytest/IntConsumer.java

@@ -0,0 +1,5 @@
+package mytest;
+
+public interface IntConsumer {
+    void accept(int num);
+}

compiler/src/test/java/mytest/RuntimeCompileTest.java

@@ -0,0 +1,34 @@
+package mytest;
+
+import net.openhft.compiler.CompilerUtils;
+import org.junit.Test;
+
+import java.net.URL;
+import java.net.URLClassLoader;
+
+import static org.junit.Assert.fail;
+
+public class RuntimeCompileTest {
+    static String code = "package mytest;\n" +
+            "public class Test implements IntConsumer {\n" +
+            "    public void accept(int num) {\n" +
+            "        if ((byte) num != num)\n" +
+            "            throw new IllegalArgumentException();\n" +
+            "    }\n" +
+            "}\n";
+
+    @Test
+    public void outOfBounds() throws ClassNotFoundException, IllegalAccessException, InstantiationException {
+        ClassLoader cl = new URLClassLoader(new URL[0]);
+        Class aClass = CompilerUtils.CACHED_COMPILER.
+                loadFromJava(cl, "mytest.Test", code);
+        IntConsumer consumer = (IntConsumer) aClass.newInstance();
+        consumer.accept(1); // ok
+        try {
+            consumer.accept(128); // no ok
+            fail();
+        } catch (IllegalArgumentException expected) {
+        }
+    }
+}
+