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/*
* Copyright 2014 Open Networking Laboratory
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.onlab.junit;
import static org.junit.Assert.assertArrayEquals;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNull;
import org.junit.Before;
import org.junit.Test;
import org.onlab.junit.TestUtils.TestUtilsException;
/**
* Test and usage examples for TestUtils.
*/
public class TestUtilsTest {
/**
* Test data.
*/
private static final class TestClass {
@SuppressWarnings("unused")
private int privateField = 42;
@SuppressWarnings("unused")
protected int protectedField = 2501; // CHECKSTYLE IGNORE THIS LINE
/**
* Protected method with multiple argument.
*
* @param x simply returns
* @param y not used
* @return x
*/
@SuppressWarnings("unused")
private int privateMethod(Number x, Long y) {
return x.intValue();
}
/**
* Protected method with no argument.
*
* @return int
*/
@SuppressWarnings("unused")
protected int protectedMethod() {
return 42;
}
/**
* Method returning array.
*
* @param ary random array
* @return ary
*/
@SuppressWarnings("unused")
private int[] arrayReturnMethod(int[] ary) {
return ary;
}
/**
* Method without return value.
*
* @param s ignored
*/
@SuppressWarnings("unused")
private void voidMethod(String s) {
System.out.println(s);
}
}
private TestClass test;
/**
* Sets up the test fixture.
*/
@Before
public void setUp() {
test = new TestClass();
}
/**
* Example to access private field.
*
* @throws TestUtilsException TestUtils error
*/
@Test
public void testSetGetPrivateField() throws TestUtilsException {
assertEquals(42, (int) TestUtils.getField(test, "privateField"));
TestUtils.setField(test, "privateField", 0xDEAD);
assertEquals(0xDEAD, (int) TestUtils.getField(test, "privateField"));
}
/**
* Example to access protected field.
*
* @throws TestUtilsException TestUtils error
*/
@Test
public void testSetGetProtectedField() throws TestUtilsException {
assertEquals(2501, (int) TestUtils.getField(test, "protectedField"));
TestUtils.setField(test, "protectedField", 0xBEEF);
assertEquals(0xBEEF, (int) TestUtils.getField(test, "protectedField"));
}
/**
* Example to call private method and multiple parameters.
* <p/>
* It also illustrates that paramTypes must match declared type,
* not the runtime types of arguments.
*
* @throws TestUtilsException TestUtils error
*/
@Test
public void testCallPrivateMethod() throws TestUtilsException {
int result = TestUtils.callMethod(test, "privateMethod",
new Class<?>[] {Number.class, Long.class},
Long.valueOf(42), Long.valueOf(32));
assertEquals(42, result);
}
/**
* Example to call protected method and no parameters.
*
* @throws TestUtilsException TestUtils error
*/
@Test
public void testCallProtectedMethod() throws TestUtilsException {
int result = TestUtils.callMethod(test, "protectedMethod",
new Class<?>[] {});
assertEquals(42, result);
}
/**
* Example to call method returning array.
* <p/>
* Note: It is not required to receive as Object.
* Following is just verifying it is not Boxed arrays.
*
* @throws TestUtilsException TestUtils error
*/
@Test
public void testCallArrayReturnMethod() throws TestUtilsException {
int[] array = {1, 2, 3};
Object aryResult = TestUtils.callMethod(test, "arrayReturnMethod",
new Class<?>[] {int[].class}, array);
assertEquals(int[].class, aryResult.getClass());
assertArrayEquals(array, (int[]) aryResult);
}
/**
* Example to call void returning method.
* <p/>
* Note: Return value will be null for void methods.
*
* @throws TestUtilsException TestUtils error
*/
@Test
public void testCallVoidReturnMethod() throws TestUtilsException {
Object voidResult = TestUtils.callMethod(test, "voidMethod",
String.class, "foobar");
assertNull(voidResult);
}
}
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