text: /*
   * Copyright 2002-2019 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
   *
   *      https://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 io.spring.nohttp.file;
  
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  import java.io.File;
  import java.io.IOException;
  
  import static org.assertj.core.api.Assertions.*;
  
  /**
   * @author Rob Winch
   */
  public class FileUtilsTest {
  
  	@Rule
  	public TemporaryFolder temp =  new TemporaryFolder();
  
  	private String text = "This is the text\nwith a newline";
  
  	@Test
  	public void readWrite() throws IOException {
  		File file = this.temp.newFile();
  
  		FileUtils.writeTextTo(this.text, file);
  
  		assertThat(FileUtils.readTextFrom(file)).isEqualTo(this.text);
  	}
  
  	@Test
  	public void readTextFromWhenNullThenIllegalArgumentException() {
  		assertThatCode(() -> FileUtils.readTextFrom(null))
  				.isInstanceOf(IllegalArgumentException.class)
  				.hasMessage("file cannot be null");
  	}
  
  	@Test
  	public void readTextFromWhenDirThenIllegalArgumentException() {
  		assertThatCode(() -> FileUtils.readTextFrom(this.temp.newFolder()))
  				.isInstanceOf(IllegalArgumentException.class)
  				.hasCauseInstanceOf(IOException.class);
  	}
  
  	@Test
  	public void writeTextToWhenNullThenIllegalArgumentException() {
  		assertThatCode(() -> FileUtils.writeTextTo(this.text, null))
  				.isInstanceOf(IllegalArgumentException.class)
  				.hasMessage("file cannot be null");
  	}
  
  	@Test
  	public void writeTextFromWhenDirThenIllegalArgumentException() {
  		assertThatCode(() -> FileUtils.writeTextTo(this.text, this.temp.newFolder()))
  				.isInstanceOf(IllegalArgumentException.class)
  				.hasCauseInstanceOf(IOException.class);
  	}
  
  	@Test
  	public void writeTextFromWhenTextNullIllegalArgumentException() {
  		assertThatCode(() -> FileUtils.writeTextTo(null, this.temp.newFile()))
  				.isInstanceOf(IllegalArgumentException.class)
  				.hasMessage("text cannot be null");
  	}
  }