public void test() throws ResourceNotFoundException {
Context context = EngineManager.getTemplate("/functionExportTest.wit").merge(new DiscardOut());
//plus
Function plus = context.exportFunction("plus");
assertNotNull(plus);
assertEquals(1, plus.invoke(0, 1));
assertEquals(5, plus.invoke(2, 3));
assertEquals(1, plus.invoke(-2, 3));
//counter
Function counter = context.exportFunction("counter");
assertNotNull(counter);
assertEquals(0, counter.invoke());
assertEquals(1, counter.invoke());
assertEquals(2, counter.invoke());
//counter
Function counter2 = context.exportFunction("counter2");
assertNotNull(counter2);
assertEquals(0, counter2.invoke());
assertEquals(1, counter2.invoke());
assertEquals(2, counter2.invoke());
//str_len
Function str_len = context.exportFunction("str_len");
assertNotNull(str_len);
assertEquals(0, str_len.invoke(""));
assertEquals(1, str_len.invoke("a"));
assertEquals(4, str_len.invoke("abcd"));
//print
Function print = context.exportFunction("print");
StringWriter writer;
assertNotNull(print);
writer = new StringWriter();
print.invokeWithOut(writer, "");
assertEquals("", writer.toString());
writer = new StringWriter();
print.invokeWithOut(writer, "hello function");
assertEquals("hello function", writer.toString());
//Exception cases:
//
Exception exception = null;