NewFileExampleTest.java

/*
 * Copyright 2009 the original author or authors.
 *
 * 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 samples.powermockito.junit4.whennew;

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import samples.expectnew.NewFileExample;

import java.io.File;

import static org.junit.Assert.assertTrue;
import static org.powermock.api.mockito.PowerMockito.*;

@RunWith(PowerMockRunner.class)
@PrepareForTest(NewFileExample.class)
public class NewFileExampleTest {
    @Test
    public void assertThatMockingFileWorks() throws Exception {
        final String directoryPath = "mocked path";

        File directoryMock = mock(File.class);

        whenNew(File.class).withArguments(directoryPath).thenReturn(directoryMock);
        when(directoryMock.exists()).thenReturn(false);
        when(directoryMock.mkdirs()).thenReturn(true);

        assertTrue(new NewFileExample().createDirectoryStructure(directoryPath));

        verifyNew(File.class).withArguments(directoryPath);
    }
}