src/test/java/net/pterodactylus/sone/test/TestUtil.java

   1 package net.pterodactylus.sone.test;
   2
   3 import java.lang.reflect.Constructor;
   4 import java.lang.reflect.Field;
   5 import java.lang.reflect.InvocationTargetException;
   6 import java.lang.reflect.Method;
   7 import java.lang.reflect.Modifier;
   8
   9 /**
  10  * Utilities for testing.
  11  */
  12 public class TestUtil {
  13
  14         public static void setFinalField(Object object, String fieldName, Object value) {
  15                 try {
  16                         Field clientCoreField = object.getClass().getField(fieldName);
  17                         clientCoreField.setAccessible(true);
  18                         Field modifiersField = Field.class.getDeclaredField("modifiers");
  19                         modifiersField.setAccessible(true);
  20                         modifiersField.setInt(clientCoreField, clientCoreField.getModifiers() & ~Modifier.FINAL);
  21                         clientCoreField.set(object, value);
  22                 } catch (NoSuchFieldException | IllegalAccessException e) {
  23                         throw new RuntimeException(e);
  24                 }
  25         }
  26
  27         public static <T> T getPrivateField(Object object, String fieldName) {
  28                 try {
  29                         Field field = object.getClass().getDeclaredField(fieldName);
  30                         field.setAccessible(true);
  31                         return (T) field.get(object);
  32                 } catch (NoSuchFieldException | IllegalAccessException e) {
  33                         throw new RuntimeException(e);
  34                 }
  35         }
  36
  37         public static <T> T callPrivateMethod(Object object, String methodName) {
  38                 try {
  39                         Method method = object.getClass().getDeclaredMethod(methodName, new Class[0]);
  40                         method.setAccessible(true);
  41                         return (T) method.invoke(object);
  42                 } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) {
  43                         throw new RuntimeException(e);
  44                 }
  45         }
  46
  47         public static <T> T createObject(Class<T> clazz, Class[] parameterTypes, Object... arguments) {
  48                 try {
  49                         Constructor<T> constructor = clazz.getDeclaredConstructor(parameterTypes);
  50                         constructor.setAccessible(true);
  51                         return constructor.newInstance(arguments);
  52                 } catch (NoSuchMethodException | InstantiationException | IllegalAccessException | InvocationTargetException e) {
  53                         throw new RuntimeException(e);
  54                 }
  55         }
  56
  57 }