/*
 * Copyright 2012-2019 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 org.springframework.boot.devtools.env;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Properties;

import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.TemporaryFolder;

import org.springframework.core.env.ConfigurableEnvironment;
import org.springframework.mock.env.MockEnvironment;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * Tests for {@link DevToolsHomePropertiesPostProcessor}.
 *
 * @author Phillip Webb
 * @author Andy Wilkinson
 */
public class DevToolsHomePropertiesPostProcessorTests {

	@Rule
	public TemporaryFolder temp = new TemporaryFolder();

	private File home;

	@Before
	public void setup() throws IOException {
		this.home = this.temp.newFolder();
	}

	@Test
	public void loadsHomeProperties() throws Exception {
		Properties properties = new Properties();
		properties.put("abc", "def");
		OutputStream out = new FileOutputStream(
				new File(this.home, ".spring-boot-devtools.properties"));
		properties.store(out, null);
		out.close();
		ConfigurableEnvironment environment = new MockEnvironment();
		MockDevToolHomePropertiesPostProcessor postProcessor = new MockDevToolHomePropertiesPostProcessor();
		runPostProcessor(() -> postProcessor.postProcessEnvironment(environment, null));
		assertThat(environment.getProperty("abc")).isEqualTo("def");
	}

	@Test
	public void ignoresMissingHomeProperties() throws Exception {
		ConfigurableEnvironment environment = new MockEnvironment();
		MockDevToolHomePropertiesPostProcessor postProcessor = new MockDevToolHomePropertiesPostProcessor();
		runPostProcessor(() -> postProcessor.postProcessEnvironment(environment, null));
		assertThat(environment.getProperty("abc")).isNull();
	}

	protected void runPostProcessor(Runnable runnable) throws Exception {
		Thread thread = new Thread(runnable);
		thread.start();
		thread.join();
	}

	private class MockDevToolHomePropertiesPostProcessor
			extends DevToolsHomePropertiesPostProcessor {

		@Override
		protected File getHomeFolder() {
			return DevToolsHomePropertiesPostProcessorTests.this.home;
		}

	}

}
